crusher buy process

impact crusher working principle

impact crusher working principle

Starting from the base working principle that compression is the forcing of two surfaces towards one another to crush the material caught between them. Impact crushing can be of two variations: gravity and dynamic. An example of gravity impact would be dropping a rock onto a steel plate (similar to what goes on into an Autogenous Mill). Dynamic impact could be described as material dropping into a rapidly turning rotor where it receives a smashing blow from a hammer or impeller. Attrition crushing is the reduction of materials by rubbing; primarily a grinding method. Shear crushing is accomplished by breaking along or across lines of cleavage. It is possible, when required, for a crusherto use a combination of two or three of these principles.

Rapidly increasing operating costs for minerals beneficiating plants continue to be the biggest single problem in maximizing profitability from these operations. The average world inflation rate has been increasing over the last decade and shows little sign of easing. The threat of continued increases in the price of fuel oil will eventually increase the cost of electrical power, in direct proportion for most users. This will undoubtedly cause closure of some lower grade ore bodies unless energy utilization efficiencies, particularly in comminution, can be improved.

Most of the recent literature concerning comminution performance improvement has been directed at grinding mill performance. It can be expected that more refined control systems will improve the overall milling energy efficiency, which is normally the largest single cost component of production. However, published gains by such methods to date appear to be limited to something less than 10%.

The second largest cost for comminution processes is normally that for wear metal consumed in grinding operations. Allis-Chalmers has continuing -research programs into all forms of comminution processes involving crushing and grinding. Improved crushing technology shows the way to reducing both energy and wear metal consumption mainly by producing finer feed which will improve downstream grinding mill performance.

A new testing procedure for studying crushing phenomena, presently being perfected by Allis-Chalmers, is described for the first time. These bench scale laboratory tests will give more accurate prediction of both energy requirements and size distribution produced in commercial crushing processes. As a direct result, this machine will allow more accurate comparisons to be made in capital and operating cost expenditures for various combinations of crushing and milling processes.

These new testing procedures can be run on small samples including pieces of drill core material. They could be part of testing and feasibility studies for most new concentrators. The same methods can be used to determine likely yield of various sized crushed products and, therefore, benefit crushed stone producers.

The theoretical and practical phenomena concerning comminution processes have received considerable attention in the literature and are not discussed here in any detail. Instead, the breakage studies in this paper are based on an empirical treatment of the fundamental relationships between energy and the size distributions of processed particles that have been observed both in the laboratory and in large-scale, commercial cone-crushing operations.

Because of the bewildering number of variables encountered when studying comminution processes, most investigators have preferred to assume that the size distribution generated in milling and crushing processes bears some relatively fixed relationship such as those described by Gates-Gaudin-Schuhmann1 or Rosin-Rammler.

Fred Bond, in his Third Theory of Comminution, used the former, essentially assuming that size versus cumulative percent passing that size was represented by a straight line of assumed slope 0.5 below the 80% passing size. Based on this assumption, Bond derived his well-known relationship:

The Work Index for rod and ball mills can be determined from laboratory tests and, as demonstrated by Rowland, the relationship gives us a reasonably accurate tool for the design of rotary grinding mill circuits.

Bonds methods have been less successful in predicting fine crushing performance, however, primarily because the typical crusher feed and product distributions do not meet the assumed conditions necessary for the satisfactory application of his equation (see Fig. (1)).

It is most evident that the curved lines appearing on Fig. (1) do not represent a Gates-Gaudin-Schuhmann size distribution. It is therefore not surprising that Bonds procedures do not work well in this situation. The Rosin- Rammler distribution has also been found inadequate to generally describe crusher products.

Work during the early 60s led to the concept of comminution as a repetitive process, with each step consisting of two basic operations the selection of a particle for breakage and the subsequent breakage of this particle by the machine. In this approach, the process under investigation is modelled by combining the particle selection/breakage event with information on material flow in and out of the comminution device.

Most workers who have used this approach have considered size reduction to be the result of the mechanical operation of the comminution device. This mechanical operation consumes the energy, and size reduction is merely a result of this energy consumption. This viewpoint is reasonably valid for tumbling mills where energy input tends to be constant and the proportion of the energy that is usefully consumed in particle breakage is low (<10%). It does not appear to be valid in compression crushers, however, since breakage energy is a significant proportion (>50%) of the total energy input to the crusher and markedly different power rates (energy input per unit of crusher feed) can be obtained by varying ore feedrates and/or crusher parameters such as closed side setting. It will therefore be necessary to include energy information in any model of the crushing process before it will be possible to accurately predict crusher performance. The inclusion of this energy-size information will significantly increase the complexity of these models.

The single-particle breakage event has been the subject of several studies. Most of these have utilized only sufficient energy to break the particle and do not simulate commercial crushing operations where energy levels are such that catastrophic repetitive breakage usually takes place. This approach to the study of comminution processes does yield valuable information, however, and it is unfortunate that it has not received greater attention.

The Bond Impact Work Index method has been an industry standard for the determination of crusher power requirements but was originally developed to ensure, that sufficient power was connected to primary gyratory crushers. In this method, pieces of rock are fractured by trial and error in the test device shown in Fig. (2), until sufficient impact energy has been applied to break the rock.

Normally, the rock breaks in halves, and in most tests only two and seldom more than three large pieces are observed after fracture. No size distribution information is used in calculating the Bond Impact Work Index from the formula:

KWH/tonne). The procedure works quite well for this type of crusher but tends to understate power requirements in fine crushers where power rates are typically much higher (upwards from 0.25 KWH/tonne).

Because of this, a research program was instituted by Allis-Chalmers Comminution Task Force Committee to break rock in a manner more analogous to that observed within commercial fine crushers. A pendulum type test device similar in most respects to that developed by the United States Bureau of Mines and shown diagrammatically in Fig. (3), was built and has been used in an extensive test program to determine whether it would be possible to predict cone crusher performance.

The rock samples selected for crushing in this device are usually minus 38mm (1-), plus 19mm () in size. The sample rock is weighed and then placed between the platens. The end of the rebound platen is placed in contact with the rebound pendulum and the crushing pendulum is raised to a predetermined vertical height which depends on the size of the sample. The crushing pendulum is then released after striking the crushing platen and breaking the rock, the remaining energy is transferred via the rebound platen to the rebound pendulum. The horizontal distance that the rebound pendulum travels is recorded by displacement of a marker and is subsequently converted to a vertical height.

where Ec = crushing energy E1 = crushing pendulum potential energy (before release) KE = kinetic energy of the two platens E2 = rebound pendulum maximum potential energy (after crushing) EL = system energy loss (sound, heat, vibration)

The system energy loss, EL, is determined by plotting EL as a function of the initial height of the crushing pendulum with no rock present. The major portion of this loss is by vibration. It is felt that the difference between system energy losses with and without rock present in the system is minimal as long as enough initial energy is supplied to result in a small elevation of the rebound pendulum.

The fragments from several rock samples broken under identical conditions were combined for each of the size analyses reported in this paper. Bond Work Indices were also backcalculated from the data using the standard formula, i.e.

Confirmation of the ability of the procedure to provide information suitable for the prediction of crusher performance was obtained by taking feed samples from 31 commercial operations treating a wide range of rocks and ores. At the time of taking a feed sample for laboratory testing in the pendulum device, relevant performance data such as power, feed rate and size distributions for feed and product were taken on the operating crusher. Several thousand rocks have been broken during tests with the device over the past 3 years.

The first thing to notice from these graphs is that there is an extremely good family relationship within each set of size distribution curves. This is somewhat coincidental, since the pendulum curve is the product of a single particle-single impact breakage event and the typical crusher product curve results from multiple particle-multiple impact breakage, but is probably due to two facts:

In order to show that the pendulum product size distribution is sensitive to power rate, several tests have been run on the same feed material at different levels of pendulum input energy. Typical results are shown in Fig. (7) as Schuhmann size distribution (log-log) plots. It can be seen that increasing amounts of fine material are produced with increasing energy input. The same effect was previously demonstrated for an operating crusher in Fig. (1). We can, therefore, conclude from this

that net power rates will be the same in the pendulum and the crusher when the two distributions coincide (as they do in Figs. (4) thru (6). This permits us to determine the efficiency of power utilization in crushers and to predict the product size distribution which will arise from operating crushers at different power rates.

The Bond Work Index figures obtained by backcalculation from the pendulum data are compared with the Net Work Index values obtained from the plants in Fig. (8). The agreement is surprisingly good especially in view of the fact that the 80% passing values do not completely describe the total feed arid product size distributions. This agreement is probably due to the fact that the use of comparable energy levels in both machines gives rise to similar reduction ratios and product size distributions. Because of this, the pendulum test provides a good estimate of the Net Work Index when this is required for current design procedures.

The pendulum product distribution is a breakage function and can be used in models of the process to predict crusher product distributions for different operating conditions. As an example of this approach, Whitens model of the cone crusher, Fig. (9), has been used to simulate the situation given in Fig. (4). The result of this simulation is given in Fig. (10) where it can be seen that very good approximations of crusher performance can be obtained.

The writers are firmly of the opinion that results to date prove that the use of this pendulum device can give more energy-size reduction information in a form readily useable for crusher application. The data can be generated in less time and from a much smaller sample than is required for pilot plant testing. Our present pendulum tester is a research tool and is currently being modified for use in commercial testing of minerals and rocks. More details of this device will be given at a later date.

primary crusher selection & design

primary crusher selection & design

The crusher capacities given by manufacturers are typically in tons of 2,000 lbs. and are based on crushing limestone weighing loose about 2,700 lbs. per yard3 and having a specific gravity of 2.6. Wet, sticky and extremely hard or tough feeds will tend to reduce crusher capacities.

Selectiingwhat size a crusher needs to be is based on factors such as the F80 size of the rocks to be crushed, the production rate, and the P80 desired product output size. Primary crushers with crush run-of-mine rock from blast product size to what can be carried by the discharge conveyor or fit/math the downstream process.A typical example of primary crushing is reducing top-size from 900 to 200 mm.

Ultimately, the mining sequence will certainly impact the primary crusher selection. Where you will mine ore and where from, is a deciding factor not so much for picking between a jaw or gyratory crusher but its mobility level.

The mom and dad of primary crushers are jaw and gyratory crushers. In open-pit mines where high tonnage is required, thegyratory crushers are typically the choice as jaw crushers will not crush over 500 TPH with great ease. There are exceptions like MPI Mineral Park in AZ where 50,000 TPD was processed via 2 early century vintage jaw crushers of a:

The rated capacity at 5 closed-side setting was 490 stph based on standard 100lbs/ft3 feed material. These crushers were fed a very fine ore over a 4 grizzly which allowed the 1000 TPH the SAG mills needed.

In under-ground crushing plants where the diameter of the mine-shaft a skip forces limits on rock size, a jaw crusher will be the machine of choice. Again, if crushing on surface, both styles of stone crushing machines should be evaluated.

the best aluminum can crushers of 2021 - reviews by your best digs

the best aluminum can crushers of 2021 - reviews by your best digs

After spending over 40 hours and crushing over 1,000 soda cans we determined that Easy Pulls auto-dispensing can crusher is the best can crusher. The Easy Pull proved to be quick, simple to use and very affordable. Additionally, its design for crushing cans virtually eliminates the risk of cutting your fingers on a ragged edge. Although it doesnt crush cans as quickly as our top pick, our runner-up Basic Industries International Multi Crush offers the ability to load up six cans at a time.

After spending over 40 hours and crushing over 1,000 soda cans we determined that Easy Pulls auto-dispensing can crusher is the best can crusher. The Easy Pull proved to be quick, simple to use and very affordable. Additionally, its design for crushing cans virtually eliminates the risk of cutting your fingers on a ragged edge. Although it doesnt crush cans as quickly as our top pick, our runner-up Basic Industries International Multi Crush offers the ability to load up six cans at a time.

When we first analyzed our finalists, we did not expect the Dial Industries Easy Pullcan crusher to top the list. At first glance, we werent particularly impressed with the appearance of the product itself more specifically, the plastic didnt strike us as particularly sturdy. However, after mounting and testing the Easy Pull can crusher, we were blown away by its ergonomic and innovative design.

The Easy Pull makes it incredibly easy to crush cans. The handle operation is smooth, and the automatic removal of the crushed cans into a container (or the optional collection bin available with the Easy Pull) places this can crusher far ahead of the other finalists when comparing average cans crushed per minute.

In actual use, the design of the Easy Pull can crusher stood out as well. The automatic disposal of the crushed can into the bin below made operation significantly easier and faster. More importantly, since we didnt need to touch the crushed can, the risk for cutting a finger on one of the cans jagged edges was virtually eliminated.

Along with the automatic dispensing of each crushed can, the Easy Pull has a rotating grip. This is particularly useful for quickly crushing cans without straining the palm of your hand and was a significant contribution to the 19-can average.

Overall, the Easy Pull Auto Dispensing can crusher provides excellent value at a sub-$30 price point (however you do need to add between $10 to $20 if you want the fitted collection bin as well). Its fast, surprisingly sturdy and shouldnt rust even if left in the garage or backyard.

The first (and most important for some) is the fact that the Easy Pull can only crush cans in the 12-ounce size or smaller. Fortunately, the vast majority of cans are the standard 12-ounce size, but if youre looking for a can crusher that handles cans up to 32 ounces, youll want to look at the MasterCrush can crusher instead.

The other metric we werent thrilled about was the size of the crushed cans. During testing, we averaged a crushed size of 2.75 by 2.75 by 1.375 inches, or 10.398 cubic inches. While this is certainly sufficient, it is notably larger than the 5.66 cubic inches of our #2 best pick, the Basic Industries International Multi Crush.

The other can crusher that stood out to us was the Basic Industries Multi Crush. Unlike most other wall-mounted can crushers, the handle of the Multi Crush leverages a large 180 arc to make cans particularly easy to crush.

The design is functional as well. Since the Multi Crush can hold as many as six pre-crushed cans at a time, the large arc of the handle make crushing six cans in succession easy for anyone including children and the elderly.

This design contributed to the rate of cans we could crush per minute, which averaged 12 cans during our testing. Interestingly, we tested the Multi Crush starting from a fully loaded position (with six cans loaded before starting the timer) and a one at a time process yielded the same rate of crushed cans per minute.

While this is slower than the 19 per minute of our top pick, the Easy Pull can crusher, it is still faster than every other can crusher we tested, and suggests that a Multi Crush with six cans loaded into it can be fully crushed in about half a minute.

The Multi Crush really stood out to us with its ability to crush cans smaller than any of other finalists we tested. In our measurements, we calculated the average size of a 12-ounce crushed can to be 2.875 by 2.25 by 0.875 inches, for a volume of 5.66 cubic inches almost half of the Easy Pull and slightly smaller than our Honorable Mention, the MasterCrush.

One element that surprised us on this otherwise-impressive can crusher was the lack of grip on the handle. When we first set up the Multi Crush, we were concerned that the lack of a grip would cause problems from an ergonomic perspective.

However, when we were actually using the can crusher, we found that the handle worked perfectly fine, and didnt prevent us from crushing 12 cans per minute into the smallest volume of all the finalists that we tested.

The first problem we noticed was that the paint chipped off fairly easily. Just during our testing period alone, we noticed that several areas were already losing some of the white paint, particularly in the areas that moved while we were crushing cans.

While chipping paint is primarily a problem of aesthetics, there is reason for concern if you have pets or young children who might accidentally eat paint from the floor. Keep this in mind before choosing this particular can crusher.

Another potential downside is the fact that the Multi Crush is only designed to work with the standard 12-ounce cans. While we were able to squeeze a 16-ounce can into the Multi Crush, it is not designed for that purpose.

One minor problem we had during testing was that cans would occasionally slip out of the sides. This was only really a problem when the can crusher was empty, and even then it only happened a couple of times.

Overall, the Basic Industries Multi Crush is a worthwhile investment if youre looking to crush lots of cans into as small a size as possible. It is easy to use, the six-can storage capability is convenient, and you can quickly crush lots of 12-ounce aluminum cans.

If you are looking to crush 32-ounce aluminum cans, this is the can crusher for you. This is one of the most popular can crushers on the Internet, which is evident if you happen to check out Amazon reviews or recycling forum threads where can crushers are discussed.

The MasterCrush is a well-built piece of equipment, in large part due to its powder-coated steel framework. Based on our testing, the MasterCrush shows essentially zero wear and tear, and we expect that it should easily last for years under typical conditions in a residential and perhaps even commercial setting.

The MasterCrush is also the only can crusher we tested which can crush aluminum cans up to 32 ounces. While many potential buyers of a can crusher wont actually need to crush cans of this size, for those who do expect to have 32-ounce cans, we think the MasterCrush is the best option on the market.

The MasterCrush also lived up to its name, crushing 12-ounce cans to an average of 2.75 by 2.75 by 0.75 inches, for a total volume of 5.67 cubic inches just slightly larger than the Basic Industries Multi Crush (5.66 square inches).

Despite the positive attributes just described, we were somewhat disappointed with the operation of the MasterCrush. While mounting the can crusher was simple enough, we found that actually operating the MasterCrush wasnt as smooth or ergonomic as we had hoped. One metric that illustrated this was that we were only able to average eight crushed cans per minute.

The Crusher by Pacific Precision Metalsis a sturdy can crusher with a comfortable rubber grip. During our testing, this can crusher was able to crush cans to an average of 8.859 cubic inches at a rate of 10 cans per minute.

The most distinguishing feature of The Crusher is the fact that it is the only can crusher we tested, other than the MasterCrush, that is rated to crush 16-ounce cans. If you are looking for a can crusher that can handle 16-ounce cans, and want something sturdier and less expensive than the Multi Crush, The Crusher is worth consideration.

We tested both the Kitchen Craft Can Crusher and the Can Pactor, because we found several sources during our research that spoke highly of them. However, during our testing we found both underwhelming and difficult to use. Unless you have a specific reason for buying one, we strongly recommend steering clear and sticking with one of our other finalists.

While conducting our research on can crushers, we found that there was a notable lack of high-quality articles and reviews on this particular product category. Of the few sources we could find, the majority lacked detail, and many were written by people who hadnt actually tested the can crushers themselves.

In addition to reading through many of the articles, reviews, forum threads and subreddits we could find on the subject, we conducted testing on six can crushers that we determined were the best on the market.

Before we could begin testing, we needed to source around 1,000 uncrushed cans. To find all of those cans, we used a couple different methods: The first was to buy lots of soda for our office, which we drank over the course of about a month.

The other method was to go to recycling centers and ask people if they would be willing to sell their uncrushed soda cans to us. While we did get more than a few sideways glances, ultimately we were able to get the cans we needed.

In order to narrow down our list of can crushers to test, we first searched for expert articles written on the subject. Unfortunately, there wasnt much of this content to be found, so we turned to recycling forums and subreddits, such as r/recycling and r/frugal, to find out which products seemed to be the most popular.

If you buy aluminum cans of soda, beer or other beverages and keep them icy cold on a hot day in one of our recommended beer koozies you will benefit from a can crusher. This is particularly the case for anyone who wants to recycle those aluminum cans instead of throwing them away, which, given the immense recyclability of aluminum cans, should be just about everyone.

Put another way, can crushers can reduce a can from about 23.3 cubic inches to an average of either 10.398 cubic inches (for the Easy Pull) or an average of 5.66 cubic inches (for the Basic Industries Multi Crush). This means you can store more than double the number of cans in the same amount of space.

Even if youre just putting the crushed cans into a curbside recycling bin, recycling trucks will have space for more cans (and other recyclables), making them more efficient and compounding the environmental benefits of recycling.

However, you dont have to be an environmentalist to benefit from a can crusher. The simple fact that aluminum cans will take up less space is reason enough to consider a can crusher for your home or office.

Theres a good reason why so much emphasis is put onto the recycling of aluminum cans namely, the lifespan of recycled aluminum is essentially endless. In other words, there is no limit to the number of times an aluminum can is able to be recycled, and the energy and capital equipment required to recycle is significantly lower than it is for the production of new aluminum.

In fact, according to the U.S. Energy Information Administration, recycled aluminum requires about 90% less energy and capital equipment than newly-process aluminum. This efficiency explains why about 75% of the 800 million metric tons of aluminum produced since the late 19th century are still in use today.

Today, around 35% of global demand for aluminum is supplied from recycled material. However, by increasing the number of people who make a point of recycling their aluminum cans, this number can grow much higher in the foreseeable future.

First off, youll want to make sure that the can crusher is made from materials that will last for many years, and that the crusher has a build quality that will ensure its reliability for the duration of its lifespan.

Its also important that the can crusher is easy to use. This means that operation is straightforward, and also that the mechanics of the crusher are designed to make it easy for everyone including children and the elderly to use the device. Remember, if the can crusher is hard to use, it probably wont be used at all.

Another important, but often overlooked, consideration is how much the can crusher actually reduces the volume of the can itself. Ultimately, the purpose of a can crusher is to compact cans so that more can be stored in less space. This particular metric can be hard to measure, which is why we calculated the volume of cans after being crushed during our testing.

Believe it or not, there is actually a lot that goes into making an effective can crusher, and the best products on the market are notable improvements on their competition. Even amongst our six finalists, our best picks were significantly easier to use, and able to crush considerably more cans per minute.

After receiving our can crushers, the first step in assessing them was to inspect their build quality. Specifically, we were interested to see how durable the materials were, and how smooth the crushing action was when there was nothing in the crusher itself. We also looked at the hand grip on each can crusher particularly its usefulness in extended can crushing sessions.

Next, we mounted each of the can crushers to a plank of wood to see if any were particularly easy or difficult to set up. Fortunately, all six finalists were simple and straightforward, which means that we were able to judge each of the finalists based on metrics outside of the initial setup.

For most people, the Easy Pull Auto Dispensing can crusher is the best option on the market. It is easy to use, affordable, durable and prevents hazardous cuts from crushed cans by automatically dispensing the can into a bin below.

Remember, essentially all of the aluminum used in aluminum cans is fully recyclable. Any products that make it easier for existing aluminum to be recycled will help reduce our dependence on producing newly processed aluminum, which is both costly and (in many cases) unnecessary.

Bryan is our cooking and kitchen expert, with more than 15 years of experience of cooking and testing kitchen products. When outside of the kitchen, he enjoys woodworking, photography, videography and figuring out how to live a more eco-friendly lifestyle. He thoroughly enjoys discovering the best, whether its ingredients or equipment, and finding products that can stand the rigors of daily use.

Your Best Digs saves you time and money with reviews of the products you need. We do extensive research and hands-on testing, so you can trust the products we recommend. All of our reviews are unsponsored, so we earn money by using affiliate links.

jaw crushers | mclanahan

jaw crushers | mclanahan

Jaw Crushers are used to reduce the sizeof many different types of materials in many applications. The Jaw Crusher was first introduced by Eli Whitney Blake in 1858 as a double-toggle Jaw Crusher. Introduced in 1906, McLanahans Universal Jaw Crusher was one of the first modern era overhead eccentric Jaw Crushers. On the overhead eccentric style Jaw Crusher, the moving swing jaw is suspended on the eccentric shaft with heavy-duty double roll spherical roller bearings.

The swing jaw undergoes two types of motion: one is a swing motion toward the opposite chamber side (called a stationary jaw die due to theaction of a toggle plate), and the second is a vertical movement due to the rotation of the eccentric. These combined motions compress and push the material through the crushing chamber at a predetermined size.

More than 110 years of engineering and customer service experience keep customers running to McLanahan tomeet their production goals. McLanahan Jaw Crushers are proudly made in the USA and have imperial designs. With our grass roots design coupled with listening to customer needs for product enhancement over the years, McLanahan offers traditional hydraulic-shim adjustment Jaw Crushers as well asH-Series Jaw Crushers that featurehydraulic discharge setting adjustment, adjust-on-the-fly chamber clearing in the event the site loses power (once power is restored) and hydraulic relief for overload events with auto-reset.

Whether the traditional hydraulic-shim adjustment or the H-Series Jaw Crushers, both machines have an aggressive nip angle that providesconsistent crushing throughout the entire crushing chamber, which leads to increased production and less downtime on maintenance.

A Jaw Crusher uses compressive force for breaking material. This mechanical pressure is achieved by the crusher'stwo jaws dies, one of which is stationary and the other is movable. These two vertical manganese jaw dies create a V-shaped cavity called the crushing chamber, where the top of the crushing chamber is larger than the bottom. Jaw Crushers are sized by the top opening of the crushing chamber. For example, a 32 x 54 Jaw Crusher measures 32" from jaw die to jaw dieat the top opening or gape opening and54 across the width of the two jaw dies.

The narrower bottom opening of the crushing chamber is used to size the discharge material. A toggle plate and tension rods hold the pitman tight near the bottom of the moving swing jaw. The toggle plate is designed to perform like a fuse and protect the crusher in the event that an uncrushable materialenters the crushing chamber. As a rule, Jaw Crushers have a 6:1 or 8:1 ratio for crushing material. Still using the 32 x 54 Jaw Crusher example, the top size of thefeed entering the crushing chamber has to follow the F80 rule that 80% of the top size feed material is smaller than the gape opening. Using the F80 rule with the 32 x 54 Jaw Crusher, the32 gape opening equals a26 top sized feed, and with the 6:1 ratio of reduction, the discharge setting would be around 4.

Since the crushing of the material is not performed in one stroke of the eccentric shaft, massive weighted flywheels are attached to the eccentric shaft andpowered by a motor. The flywheels transfer the inertia required to crush thematerial until it passes the discharge opening.

While Jaw Crushers are mostly used as the first stage of material reduction in systems that may use several crushers to complete the circuit, the Jaw Crusher has also been used as a second-stage crushing unit. Depending on the application requirements, Jaw Crushers can be used in stationary, wheeled portable and track-mounted locations. The Jaw Crusher is well suited for a variety of applications, including rock quarries, sand and gravel, mining, construction and demolitionrecycling, construction aggregates, road and railway construction, metallurgy, water conservancy and chemical industry.

F100 is the maximum gape opening on a Jaw Crusher. F80 is the feed size to the Jaw Crusher, calculated by taking 80 times the gape opening divided by 100. P80 is the percent passing the closed side setting in tph.

A best practice, if possible, is to blend the material arriving from the source. This will ensure a constant and well-graded feed to the crushing chamber. In turn, this will produce a steady rate of tph andpromote inter-particle crushing that helps break any flat or elongated material. It also aids in equal work hardening the manganese jaw dies and prolonging the life of the jaw dies.

Usually a Jaw Crusher is in an open circuit, but it can be used in a close circuit if the return load is not greater than 20% of the total feed and the raw feed is free of fines smaller than the closed side setting.

Efficiency can be defined by the ratio of the work done by a machine to the energy supplied to it. To apply what this means to your crusher, in your reduction process you are producing exactly the sizes your market is demanding. In the past, quarries produced a range of single-size aggregate products up to 40 mm in size. However, the trend for highly specified aggregate has meant that products have become increasingly finer. Currently, many quarries do not produce significant quantities of aggregate coarser than 20 mm; it is not unusual for material coarser than 10 mm to be stockpiled for further crushing.

rock crushing & sand making machine for sale - eastman rock crusher

rock crushing & sand making machine for sale - eastman rock crusher

In the past 30 years, we have focused on the research, development and manufacture of mining crushing equipment, sand making equipment, industrial milling equipment, and keep improving them to build more environmentally friendly equipment.

Ganzhou Eastman Technology Co., Ltd. has for the target market in selling mineral processing equipment for rock crushing/grinding and sand making/washing operations. We provide those machines directly from our owned manufacturing workshop located in Shangyou factory or Shicheng factory based in Ganzhou, Jiangxi, China. So, as a customer you can properly get the most reasonable price equipment, also with promised good quality.Except saling our rock crushing & sand making equipment, we have Mining & Mineral Processing Engineer helping you make the right choice in crushing process and sand making processing. Also, our experienced exports are willing to help you design the perfect product line for your aggregate plant or sand making plant.

You can buy from us almost every material crushing processing equipment starting from crushing, grinding, sand washing & making, classification. And there are many customers cases you can find in our site.

Sand making production line consists of vibrating feeder, Jaw Crusher, Cone Crusher, Impact Crusher (sand-maker), Vibrating Screen, Sand Washer (sand classifier), Belt Conveyor, water treatment system and centralized electronic control system.

rock crushing rule of thumb

rock crushing rule of thumb

Gyratory crusher: feed diameter 0.75 to 1.5m; reduction ratio 5:1 to 10:1, usually 8:1; capacity 140 to 1000 kg/s; Mohs hardness <9. More suitable for slabby feeds than jaw crusher. [reduction by compression].

rock & stone crushers | rock crushing machines | williams crusher

rock & stone crushers | rock crushing machines | williams crusher

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Williams Patent Crusher is proud to offer a line of rock crushing machines that provide a wide range of available options. We understand that every crushing and grinding job is different, and we strive to make sure every machine we construct is a custom solution that gets a specific job done right. Thats why weve been an industry leader in rock crushing for over 150 years.

Our engineers have designed a whole catalog of rock and stone crusher equipment capable of completing a wide range of medium to large-sized applications. Although most of our crushers and mills are constructed for heavy-duty, industrial projects, we do offer machines for smaller stone crusher applications as well. Learn more below.

Blasting, drill, and scaling out limestone requires the right equipmentand when it comes to limestone material size reduction, its no different. Williams Crusher has designed and manufactured the most durable and efficient limestone crusher machines on the market for over 150 years. Browse our catalog of limestone mills & crushers.

Williams Crusher designs and manufactures innovative diatomaceous earth grinding mills for grinding, drying, and classifying the material to a powdery, dust-like form. Our industrial diatomaceous earth grinders can be manufactured to produce a size-reduced product needed for your application. Learn more about our diatomaceous earth grinding mills.

The Williams Crusher engineers design and manufacture rugged barite grinding mills and crushers that can accomplish the appropriate size reduction needed for your application. Each grinding project is unique, and the Williams team can help create a barite grinding or crushing solution to fit your needs. Learn more about our barite grinding mills & crushers.

Williams Crusher offers a variety of gypsum mills and pulverizers that can process both synthetic gypsum as well as natural gypsum rock to the appropriate size you need for your application. Each pulverizing and grinding project is unique, which is why our gypsum mills are designed to fit your needs. Learn more about our gypsum mills & pulverizers

Exhibiting powerful design and rugged durability, the Willpactor is perfect for primary rock crushing applications. Willpactors thrive in high-capacity applications crushing large run-of-mine rock, with machines available in sizes to accommodate 44 to 72 rock. External product size adjustment and solid impact block adjustment are just some of the features of these rock crushing machines.

The Willpactor II handles feed sizes beyond the range of conventional secondary and tertiary crushers. A large feed opening, contoured hi-chrome rotor, and easy maintenance are just a few of the features that make the Willpactor II impact rock crusher machine a great asset for any rock crushing application.

The Williams Reversible Impactor reduces maintenance and operating costs with few tolerances between crushing surfaces and no cage bars. Horsepower requirements per ton are generally low, making the Williams Reversible Impactor rock crushing machine a cost-efficient option.

The Williams Traveling Breaker Plate Mill is more suitable for clay and muddy rock crushing. The breaker plates on this hammer mill continually travel while in use with all slack on the away side. This design lengthens the life of the plates and eliminates clogging when refining wet, sticky material.

We manufacture a large variety of hammer mills and hammer rock crushers to handle virtually any size reduction job. From our large High-Tonnage Hammer Mills to smaller Type GP Hammer Mills, we have a stone crusher solution thats suitable for your project.

Our Vertical Roller Mill Pulverizers utilize centrifugal force to grind material while maintaining low operating costs. Featuring easily replaceable wear parts, automated process controls and nearly infinite turndown thanks to VFAC drives. These machines are great for pulverizing rock in fine-grind applications.

how to buy a metal crusher, metal crusher for sale

how to buy a metal crusher, metal crusher for sale

1. Choose the model Before starting to make a purchase, you should have your capacity in mind. Based on your raw materials and capacity, we could recommend the proper model for you. After the model is chosen, we have the proper ancillary equipment for your option, such as conveyor, dust collector, etc. The voltage can be customized accordingly. Furthermore, we could customize according to your special requirement. 2. Choose proper company. When comparing the suppliers, learning about the reputation, after-sale service and the quality of the machine except for the price. 1) It is important to make sure the picture is the same with the machine, and also try to get the pictures which shows the interior of the machine. We confirm that the pictures we offer conform with the actual machine, meanwhile the operation of the machine could be showed through pictures and videos.

2)The price of metal crusher is in proportion to its weight. The material of the crusher, the thickness of its steel plate and the manufacturing process all have relations to the price. When there is a big difference between the prices of crushers with the same exterior, check the interior of the machine. 3) A good metal crusher can significantly increase the capacity and work efficiency of the metal crushing line. The machine casing of our metal crusher adopts high quality steel plate. The lining plate inside the crusher adopts manganese steel, while reinforcing ribs are added on the casing, making the machine high production efficiency, high safety, and durable in use. 4) We can send our engineers for on site installation, commissioning and training after your receipt of our machines, who will instruct with care for the operation and maintenance of the machine. If there is any requirement with regard of our machine during operation, please feel free to let us know, and we will help you to solve the problem in time. 3. Visit the factory. Visit the factory if possible to learn about the company and the equipment. We will arrange a test-run when you come to visit our factory so that you can learn about the quality and operation of the machine.

4. Maintenance The machine shall be maintained routinely to ensure its normal running and further prolong its service life. Our metal crusher is equiped with hydraulic system, which is convenient for the maintenance of the machine. One person can maintain the machine easily. To ensure normal production, it is better to have some wearing parts when buying the machines. Now you know how to buy a metal crusher, its time to start to buy the machine. We endeavor to provide you with the most approiate model to promoto your business, please reply on us.

crusher, crushing plant - all industrial manufacturers - videos

crusher, crushing plant - all industrial manufacturers - videos

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RETSCH jaw crushers are used for the rapid, gentle crushing and pre-crushing of medium-hard, hard, brittle and tough materials. They are primarily used in laboratories and pilot plants under rough conditions but are also ...

RETSCH jaw crushers are used for the rapid, gentle crushing and pre-crushing of medium-hard, hard, brittle and tough materials. They are primarily used in laboratories and pilot plants under rough conditions but are also ...

RETSCH jaw crushers are used for the rapid, gentle crushing and pre-crushing of medium-hard, hard, brittle and tough materials. They are primarily used in laboratories and pilot plants under rough conditions but are also ...

STONE CRUSHER FOR EARTH MOVING FIELD The smallest dimensions for the highest performances. They represent a real revolution for small yards with lack of space. The stone crushers of the Caesar series, ...

STONE CRUSHER FOR EARTH MOVING FIELD The smallest dimensions for the highest performances. They represent a real revolution for small yards with lack of space. The stone crushers of the Caesar series, ...

The extra powerful premium pre-crusher The extra powerful FRITSCH Jaw Crusher PULVERISETTE 1 premium line with its up to 3 kW drive power ensures an exceptionally high throughput and is the ideal instrument ...

The compact pre-crusher The compact FRITSCH Jaw Crusher PULVERISETTE 1 classic line is the ideal instrument for fast and effective pre-crushing of hard and very hard brittle materials - batchwise or ...

The compact pre-crusher The compact FRITSCH Jaw Crusher PULVERISETTE 1 classic line is the ideal instrument for fast and effective pre-crushing of hard and very hard brittle materials - batchwise ...

Sanvik's QJ341 is a mobile jaw crusher which is applicable for the industries of quarrying and construction. With its compactness, it involves a hydraulic adjustment, reversible jaw and automatic central lubrication. ...

The Sandvik UJ310 wheel-mounted crushing plant is a comprehensive system comprised of all the process steps needed in crushing operations. The system is designed for easy transport between sites, and can be easily set ...

This is a mobile crushing plant of model UJ440i from Sandvik that offers operations without trouble and in an exceptionally smart way due to the presence of an intelligence system in it. The intelligent - control system ...

Liming Mobile Primary Jaw Crusher KE750-1 is a mobile crushing equipment for coarse crushing. The whole machine includes four systems: feeding, screening, conveying and crushing. The crushing ability is strong, and the ...

PE600900 jaw crusher is used in the first process of coarse and medium crushing various minerals and rocks. The advantages of high efficiency, strong crushing capacity and low investment cost make jaw crusher ...

PE7501060 jaw crusher is used in the first process of coarse and medium crushing various minerals and rocks. The advantages of high efficiency, strong crushing capacity and low investment cost make jaw crusher ...

FABO PRO 150 is a mobile type & closed circuit crushing plant model that is suitable for almost all types of stones except those which's hardness level is too high. Technical Specifications : Production Capacity ...

... blowbars and grinding plates MSIH series crushers are the economical alternative to cone crushers. HIGH QUALITY FINES PRODUCTION High Percentage of Cubical Shape and Close Grain Distribution CRUSHER ...

Hammer Crushers Hammer crushers of the type MHC are employed for the fine crushing of medium-hard to soft materials, like quicklime, dolomite, gypsum, limestone, diatomite, chalk. MODE OF OPERATION The ...

Jaw crushers reduce large rocks or ore by means of compression. Mechanical pressure is applied using the crushers two jaws; one is fixed while the other reciprocates. There are also primary and secondary ...

Characteristics Smallest jaw crusher in the MOBICAT model range, the design of which is heavily based on the MC 110 R and its appearance is also very similar. It also impresses with its familiar diesel-direct drive ...

Characteristics Mobile jaw crusher from the new EVO generation with diverse possibilities of use, ideal for requirements in the Contractor area. The jaw crusher has an inlet opening measuring 1,100 ...

Characteristics Mobile jaw crusher from the new EVO generation with diverse possibilities of use, ideal for requirements in the Contractor area. The jaw crusher has an inlet opening measuring 1,100 ...

Bean crusher BIC The Bhler Barth bean crusher BIC efficiently crushes raw, pretreated, or roasted cocoa beans or reduces cocoa shells. Beyond its application in the cocoa processing industry, it is also ...

Impact machine Matador The impact machine Matador type MJZH is an entirely new impact machine designed for mechanical destruction of insects and their eggs in flour or semolina. Thanks to the machines particularly effective cross-current ...

The Jaw Crusher reduces the size of stones and ores by squeezing, it is able to accept large size raw materials and is usually used for primary crushing. Typical features of a jaw crusher are its two ...

The impact crusher uses horizontal and high-speed moving rotors to crush materials, which can help the producer to obtain a fine-grained and evenly distributed product. Impact crushers are widely used ...

The vertical shaft impact crusher is one of the most common manufactured sand equipment. GEP Ecotech's vertical shaft impact crusher is popular in the market for its significant advantages such as large ...

GE Series Economy Crusher This series can provide different rotor designs. The rotor width covers 500mm to 1400mm. The rotor adopts high-efficiency double-scissor cutting technology. The welded cavity of the entire steel ...

... Plastic Grinder Product Description GH heavy-duty crushers are designed for size reduction of tough materials and to meet high grinding requirements with overall steel welded structure. GH crushers ...

a jaw crusher that crush and directly pack light demolition remains (debris, tuff, bricks, tiles, pieces of marble and concrete). 100% made in Italy, is a machine designed to be used in small places and apartments because ...

SEIM Plus is the high capacity, non-portable, version of the SEIM Compact . Principle of operation: Jaw Crusher Power supply: 400 V- 50Hz single-phase Motor power: 4 kW Hopper inlet dimensions: 620 x 510 mm Entrance ...

Principle of operation: Jaw crusher bucket Hydraulic power supply required requirements: Oil flow 40 l / min and oil pressure 180 bar Entrance dimensions crushing chamber: 400 x 300 mm Dimensions (p x l x h): 1500 ...

Tertiary impact crushers are used for soft and medium-hard materials crushing, with close grain distribution and cubical products. Tertiary impact crushers are preferred because of they are being an ...

... stretching and belt stretching - - Spare parts and service books - - User and maintenance books Vertical Shaft Impact Crushers secondary, tertiary or quaternary stage crushing Two layers of anti-corrosion Acrylic Tungsten ...

Jaw crusher is a unique machinery applicable for all types of stones starting from the softest one and ending with the hardest one. This type of crusher can be used as in the first stage of crushing, ...

... types of crusher are applicable to obtain the aggregate at the sizes suitable for production of asphalt and concrete. For these purposes cubic aggregate is preferred since the angular and rough surface has high binding ...

... Vertical Shaft Impact Crushers are known as also SAND MAKING MACHINES and used as a tertiary stage crusher to get high ratio of fine material and to give cubical shape to the products that are coming ...

CONSTMACH JAW CRUSHERS are designed to be able to handle initial crushing process of any type of material from the softest limestone to the hardest granite. CONSTMACH Jaw Crushers are used as the first ...

CONSTMACH Primary Impact Crushers are excellent solutions for crushing soft & middle hard materials with high production capacity and cubical shaped products. High reduction ratio of our Primary Impact Crushers ...

... samples and a light alloy body which can easily be clamped to the edge of a table with the built-in clamping screw. This crusher is approved by several government agencies, including Japan for official use in moisture measurement.

Product Introduction: 1. Although the jaw crusher appeared in early times, it has been still widely used in metallurgy, chemistry, building materials, electricity and transportation industries. Because it has features ...

Hydraulic jaw crusher Product Introduction: PEY series jaw crusher has the overload protection, and the rated load can be set casually. It can choose the suitable material to crash and do not deal ...

Product introduction The PYY series single-cylinder hydraulic cone crusher is suitable for large and medium-sized sand and ore processing enterprises .It's used as a secondary, tertiary or fourth-grade fracture of ore, ...

Product introduction The PYD-series multi-cylinder hydraulic cone crusher is a new generation crusher introduced by our company with lower production cost, longer service life, and better granular shape. ...

... output . 4. Easy to achieve automation Automatic control can be realized when the crusher is upgraded to hydraulic adjustment. 5. An enlarged bearing The new crusher uses four bearings of the same ...

XQJ rotary cutter is widely used in agricultural farms,as corn stalk, alfalfa, wheat straw, rice straw ect. The crushing range of rotary cutter is wide,set chipping and crushing sections into one machine.It can cut wood branch and stem ...

The crushing range of rotary cutter is wide,set chipping and crushing sections into one machine.It can cut wood branch and stem with 1-20cm diameter,also can sue for bamboo,grass,corn stalk,sorghum stalk,etc. It is wideyl used in the ...

Cone Crusher Bowl Liner Suit for Nordberg HP400 Spare Parts from China Manufacturer Hyton produce High manganese casting liners mainly include Mantle, Bowl Liner, Feed Cone , jaw plate, check plate, Arm Liner , Steel ...

Sawdust Making Machine For Mdf Board DESCRIPTION The wood crusher can produce 5-20mm Wood chips and sawdust. The finished product can be used to be animal bed, making incense, making pellets and others. Wood crushing ...

... of wood powder equipment developed by our factory that has integrated the crushing principles of various traditional wood crushers at home and abroad for many years. It can process raw materials such as wood, branches ...

DESCRIPTION Sawdust crusher, also known as sawdust maker, sawdust hammer mill,is a special series of wood crusher equipment. Oreco Sawdust Making Machine improves the service life of the crusher. ...

The can and carton crusher is a compactor designed for: - Reducing tin and metal tank volume. (Lower access) - Loads cardboard and paper. (Upper access) Designed to solve residue storage and disposal problems ...

The vertical hammer crusher is used for medium crushing and fine crushing of various hardness and brittle materials like rock, refractory material, cement, quartzite, and concrete aggregates. The content of water in the ...

... gyratory crushers have new advancements that bring increased speeds, higher installed power and mechanical improvements. All of these combine to bring up to a 30% additonal throughput for your primary gyratory crusher. ...

A crusher uses mechanical energy to break stone blocks into smaller pieces of a desired size. Maximum input size is limited by the machine's design. Several crushing stages may be necessary to obtain the desired final product. Primary and secondary crushers handle large pieces, while tertiary and quaternary models produce finer particles.

Crushers are used in mining to reduce the size of ore blocks, facilitating subsequent treatment. In quarries, they transform rock into a finished construction product (gravel, sand, etc.) or a raw material for industrial use. They are also used to recycle concrete, road surfacing and other materials.

Choice of crusher model will depend on: - material to be crushed and its resistance to compression - the maximum size of the initial pieces - desired output size - treatment capacity in tons per hour

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