Improvement: Shallow groove, the stator lower than the impeller, large slurry circulation volume, low energy consumption; the stator is a cylinder with an elliptical hole which is conducive to the dispersion and mixing of pulp and air. Umbrella shaped dispersion cover with hole keeps the pulp surface stable.
JJF flotation machine(floatation cell) is a new type of flotation equipment advanced in China. It can be widely used in the selection of non-ferrous metals, ferrous metals and non-metallic minerals. It is suitable for rough selection and sweeping of large and medium-sized flotation plants.
Large clearance between impeller and stator, the stator is a cylinder with elliptic hole, and it is good for mixing and dispersing the gas and pulp. The height of stator is lower than the impeller, pulp circulation volume is large, and it can be reached at 2.5 times of others.
When the impeller rotates, eddy current is generated in the vertical cylinder and the draft tube. The eddy current forms a negative pressure, and the air is sucked from the intake pipe and sucked in the impeller and stator regions and through the draft tube. Mix the pulp. The slurry gas mixing flow is moved by the impeller in a tangential direction, and then converted into a radial motion by the action of the stator, and uniformly distributed in the flotation tank. The mineralized bubbles rise to the foam layer, and the unilateral or bilateral scraping is the foam product.
In small plants, it is common practice to include conditioners following the last stage of grinding. Additional conditioners are normally required between flotation operations which produce individual mineral concentrates. Each conditioner stage should consist of a minimum of two separate agitated tanks. Provision must be made to drain and clean conditioner tanks to appropriate flowsheet locations. This is particularly important in the case of conditioners which follow the grinding circuit since these tanks tend to accumulate oversize material produced during grinding circuit upsets.
Conditioners provide positions in the plant flowsheet wherein changes to the ore slurry are brought about by the addition of reagents and pH modifiers. Conditioners must always be designed to provide adequate time for chemical or physical changes induced by reagent additions to proceed to completion. Conditioners also serve a useful function in that swings in ore grade, particle size distribution, or other flotation variable tend to be partially homogenized and dampened during the conditioning unit operation. For example, in small installations it is not unusual to experience wide swings in feed grade. The conditioning unit operation provides the operator an opportunity to modify reagent additions in order to maximize recovery during periods of process instability. If possible, conditioner tanks should be arranged in tiers so that slurry overflows between sequential tanks under the influence of gravity.
The selection of flotation cell size and configuration can have a substantial influence upon installed cost and can contribute to operational efficiency. Two possible flotation configurations for a 500 metric ton per day installation are presented in Figure 5. The computational basis assumes 30 percent solids in rougher flotation, 20 percent solids in cleaner, recleaner and cleaner-scavenger flotation, a ratio of concentration in rougher flotation of 3.07 an overall ratio of concentration of 5.0, and an ore specific gravity of 2.9. This representation indicates that the flotation bay layout employing the larger flotation cells, in this case 2.83 cubic meter (100 cubic feet) machines, occupies less area and reduces installed capital cost by about 25 percent. However, there are instances when the first illustration (selection of small flotation cells) would be chosen for reasons of compactness and symmetry.
Complex multiple product flotation installations usually require a high degree of sophistication regarding operational control. Many times, in small flotation concentrators this level of sophistication is not available. If the facility is located in a remote area, experienced operational personnel may be impossible to acquire. Consequently, the flotation circuits should be as simple as possible. For an installation producing a single mineral product, the flotation scheme illustrated in Figure 6 is recommended. This system, which is compatible with configuration 2 on Figure 5, is simple to operate and eliminates the build-up of a large circulating load of scavenger concentrate. This system is also flexible in that various produced concentrates can be subjected to regrinding should changes in mineralogy or primary grind so dictate.
It must be recalled that the weight of rougher and cleaner concentrates produced from high-grade ores can be substantial. Provision to remove froth by the use of froth paddles on all flotation cells should be included in the original design. The additional capital cost required for froth paddles is a reasonable investment since these devices tend to negate errors in flotation pulp level or frother addition. The open circuit flotation system presented can be operated by individuals having minimal training. The advice of Taggart regarding the inclusion of a small pilot table as a visual sample on rougher tailings is still legitimate.
In almost all new flotation installations, the use of launders fabricated from sheet rubber is recommended. Care must be taken to insure that all launders are sloped properly. In addition, launders must be provided with appropriate sprays and sluice lines to facilitate concentrate transport. The launder water system must be carefully designed to insure functionality without excessive concentrate dilution.
In recent years it has become popular to use vertical pumps for both concentrate and tailing transport in smaller circuits. It is usually possible to employ only one, or at the most two, pump sizes for all of the required flotation pumping installations. The same size vertical pump may also be used in various locations about the plant for cleanup duty. The usage of vertical pumps reduces seal water requirements, and eliminates concrete pump bases, fabricated sumps, and the valving associated with horizontal pumps.
For the past 35 years Sub-A Flotation Machines have been serving faithfully in all parts of the world. Anniversaries of progress such as this make reminiscing very interesting and we thought you would enjoy seeing some of the Firsts in the flotation machine industry as pioneered by the Sub-A.
1928was a pioneer in the use of V-belt drives in the flotation industry. This high-head machine also had wide-spaced greaseless lower bearings. At one time this was the largest flotation machine in the world.
1930 First steel tank flotation machine. Earlier machines had wood tanks. Steel tanks met great opposition at first, later became standard. This high-head, all-steel Sub-A marked the introduction of anti-friction lower bearings.
1932 First low-head flotation machine marked a radical departure from the then accepted principle that the space between bearings must be greater than the distance beyond the lower bearing. This machine was of the cell-to-cell pulp flow design and used a quarter-turn flat belt line-shaft drive.
1933 First steel tank low-head, low-level flotation machine. It had an individual motor and a V-belt drive. This design became very popular with mill operators and thousands of cells were sold similar to those pictured above.
Laboratory Flotation Machines have made progress, too. In our early days the cast-iron tank machine with its round-belt mule drive was the latest word. Contrast it with todays modern Sub-A Laboratory Flotation Machine with its heavy glass tank and stainless steel parts.
1961 Todays demands for Sub- A Flotation Machines keep our modern factory busy. Today more Sub- A Flotation Machines are specified than all competitive makes and is the unquestioned First Choice in Flotation.
Flotation is the most widely used beneficiation method for fine materials, and almost all ores can be separated by flotation. Another important application is to reduce ash in fine coal and to remove fine pyrite from coal. The flotation machine is mechanical equipment for realizing the froth flotation process and separating target minerals from ore. At present nearly 2 billion tons of ore in the world are treated by the froth flotation process. According to rough statistics, about 90% of non-ferrous minerals are recovered by the flotation method, accounting for 50% proportion in the field of ferrous metal mineral separation.
Suitable material Sulfide minerals, oxide minerals, non-metallic minerals, silicate minerals, nonmetallic salt minerals, soluble salt minerals, rare earth minerals, etc., including gold, silver, copper, lead, zinc, galena, zinc blende, chalcopyrite, pyroxene, molybdenite, nickel pyrite, malachite, cerussite, smithsonite, hematite, cassiterite, wolframite, Ilmenite, beryl, spodumene, brimstone, graphite, diamond, quartz, mica, feldspar, fluorite, apatite, barite, and so on.
The flotation machine is composed of single or multiple flotation cells, by agitating and inflating the chemical reagent treated slurry, some mineral ore particles are adhered to the foam and float up, and then be scraped out, while the rest remains in the slurry.
Industrial flotation machines can be divided into 5 classes, mechanical agitation flotation machine, pneumatic flotation machines, flotation column, airlift flotation machine, froth separation flotation machines. At present, the mechanical flotation machine is the most commonly used in industry, followed by the column flotation which has recently set off hot spot, the pneumatic type and froth separation are not common.
Commonly used flotation models TankCell series, Wemco series, Agitair series, SuperCells, RCS(reactor cell system), Denver laboratory flotation, KYF, and XCF series flotation devices, laboratory flotation machine. Well-known flotation machine manufacturers have Outotec, Flsmidth, Metso, BGRIMM, JXSC flotation machine china; column flotation manufacturers or models have Jameson, CPT, Counter-flow inflatable flotation column.
Main parts: slurry tank, agitator device, mineralized froth discharging system, electromotor, etc. 1. Slurry tank: mainly consist of a slurry inlet, slurry tank and a gate device for controlling the slurry volume, welded with steel plate. 2. Agitator: slurry tank have a series of the mechanically driven impeller that disperses the air into the agitated pulp. 3. Mineralized forth discharging: the useful minerals are enriched in the foam, scraped out, dehydrated, and dried into concentrate products.
Whatever flotation machines design is selected, it must accomplish a series of complicated industrial requirements. 1. Good mixing function. a qualified flotation machine should mix the slurry uniformly and maintain the particles especially the target mineral particle in suspension with the pulp, maximum the froth-mineral probability. 2. Adequate ventilation and distribution of fine bubbles. Except for the flotation machine performance, the frother type and dosage also matter to the distribution of the bubbles. 3. Appropriate agitation control in the froth beds. It is should pay importance to keep froth zones smoothly, which ensures the suspension of collector coated particle.
1. The throughput capabilities of various cell designs will vary with the ore property (beneficiability, size, density, grade, pulp, PH, etc.). In the case of ore easy separated, and a small amount of air inflation required, may choose a mechanical flotation machine; if the minerals with coarse size, proper to choose the KYF, BS-F, ore CLF type; what's more, when in case of ore easy separated, fine particles, high grade, low PH, flotation column is the best, especially in the concentrating process. 2. There is a difference between the process of concentrating, rough selecting. Thin froth layer is better for separate mineral particles, thus may not choose a large air inflation flotation machine.
Mining Equipment Manufacturers, Our Main Products: Gold Trommel, Gold Wash Plant, Dense Media Separation System, CIP, CIL, Ball Mill, Trommel Scrubber, Shaker Table, Jig Concentrator, Spiral Separator, Slurry Pump, Trommel Screen.
[Ken Conrad] didnt like spiderbot projects he saw on the Internet: they mostly had 2 degrees of freedom per legif not fewer. He set out to make a hexapod robot with 18 DOF and the ability to move in any direction. Measuring around 20 from tip to tip, the custom, 3D-printed chassis was designed around eighteen SG90 9g micro servos. Each leg has 3 servos, one to move the tip, one for the middle, and one to move the entire leg back and forth, crab-style.
Perhaps the most intriguing notion of the project are the big paddle-like legs. [Ken] hopes get the robot to achieve some degree of flotation by laying its lower legs flat, staying afloat either due to surface tension, or maybe with the help of some buoyant material added to the legs.
This week, were switching off the Tube and taking a field trip to Emporium, Pennsylvania, home of the Sylvania vacuum tube manufacturing plant. Now, alot of companies will tell you that they test every single one of their products, ensuring that only the best product makes it into the hands ofJohn Q. Public. We suspect that few of them actually do this, especiallythese days. After all, the more reliable the product, the longer it will be before they can sell you a new one.
For Sylvania, one of the largest tube manufacturers of the golden age, this meant producing a lot of duds. A mountain of them, in fact, as you can see in the picture above.Thisarticlefrom the January 1957 issue ofPopular Electronicsvilifies forgers who used all kinds of methods to obtain defective tubes. They would then re-brand them and pass them off as new, which was damaging toSylvanias good name and reputation.
In addition to offering a reward for turning in knowntube forgers, Sylvania did the most reasonable thing they could think of to quash thegray market, which was building a tube-crushing machine. Pulverizing the substandard tubes made surethat there were no factory seconds available to those fraudsters. After crushing shovelful after shovelful of tubes, the glass splinters were removed through a flotation separation process, and the heavy metals were recovered.