crushed ore dryer package

compressed air dryer brochure - donaldson - pdf catalogs | technical documentation | brochure

compressed air dryer brochure - donaldson - pdf catalogs | technical documentation | brochure

Frequency converter or suctionpressure control two ways to one objective: Energy-saving The multifunction display > Current pressure dewpointOperating mode normal/summer/automaticEnergy consumption in relation to the overall service life Error messagesMalfunction historyExpired maintenance intervalsCondensate drain operating statusOperating hoursRefrigerant compressor on/offCurrent energy consumption With the Boreas Variopulse DV 1800 AP to DV 2800 AP, the performance of the refrigerant circu-lation system is controlled in the partial load range bya suction pressure control. This closes the...

Compact electrical cabinet withall operating units at the front.Permanently illuminated display indicating all relevant information. > The frequency converter used to control the per- formance regulates the speed of the refrigerantcompressor (DV 3500 AP to 28500 WP).In the smaller refrigeration compressed air dryers,the performance is controlled by a solenoid valvein a suction pressure control system instead of a frequency converter (DV 1800 to 2800 AP). > All Boreas Variopulse refrig-eration compressed air dryersare equipped with the level-controlled condensate drainUFM-T100. This fully...

java (package)

java (package)

import import package java .java // : package vehicle; public class Car { // } ....\vehicle\ -> vehicle.Car -> vehicle\ ( windows ) . com.runoob com.runoob.test ....\com\runoob\test\ .class // : package com.runoob.test; public class Runoob { } class Google { } -d $javac -d . .\com\runoob\test\Runoob.class .\com\runoob\test\Google.class \com\runoob\test\ import com.runoob.test.*; .class .java .class .java \sources\com\runoob\test\ \classes\com\runoob\test\Google.class java JVM class path CLASSPATH java package class path .class \classes class pathpackage com.runoob.test, JVM \classes\com\runoob\test .class class path JVM JAR Java class path CLASSPATH CLASSPATH Windows DOS C:\> set CLASSPATH UNIX Bourne shell # echo $CLASSPATH CLASSPATH Windows DOS C:\> set CLASSPATH= UNIX Bourne shell # unset CLASSPATH; export CLASSPATH CLASSPATH: Windows DOS C:\> set CLASSPATH=C:\users\jack\java\classes UNIX Bourne shell # CLASSPATH=/home/jack/java/classes; export CLASSPATH

mineral drying

mineral drying

Drying is a critical aspect of mineral processing; throughout the journey from ore to end product, the ability to control moisture content helps to reduce shipping costs, streamline downstream processing, and produce a refined product.

While mineral dryers may appear the same as other industrial dryers, they are typically built to withstand more rigorous demands compared to many other industry; due to the nature of minerals, mineral dryers are subject to consistently harsh processing conditions, necessitating a dryer with heavy-duty components and materials of construction.

The diverse nature of minerals and associated processing techniques can demand drying at any and all stages of mineral processing, from raw ore to concentrate, all the way to finished product. Minerals that commonly require a drying step during processing include:

Extracted ore, no matter the mineral, is typically first crushed, and then must go through a beneficiation process to remove the unwanted impurities. Beneficiation can vary significantly from one ore type to the next. In most cases, however, beneficiation is carried out through a wet process that necessitates a subsequent drying step. Mineral drying at this stage offers several benefits:

Drying raw ore makes transportation much more economic by removing the bulk of the moisture from the material, so producers are not paying to transport water weight and can utilize fewer transportation units.

Moisture in raw material feedstock is problematic in downstream processing, because it increases the potential for buildup. Buildup in turn has the potential to clog equipment, stalling the operation, or even damaging equipment due to corrosion or abrasion. Depending on the mineral being processed, damage can be worsened by the materials unique properties. Such is the case with gypsum, which can harden in place because of its cementitious nature.

In general, the less moisture content a material has, the easier it is to handle (this is only true up to a point, as material then becomes dusty and presents new handling challenges). A moisture-rich material can wreak havoc on the flow of operation as material moves through hoppers, bins, transfer points, conveyors, and more. Drying greatly improves material flowability, avoiding such issues.

The extent to which a mineral must be dried is highly variable, differing based on the type of mineral, characteristics found at the specific deposit, subsequent processing techniques, and the desired end product.

Drying is also essential in ensuring product integrity is maintained. Every product has a unique range (or even exact percentage) at which it will maintain its form; too dry and the material is more likely to degrade and cause dust issues (attrition); too wet and the material could foster caking or harbor mold growth. Reaching the precise moisture content for a given material ensures that the product will stay in its intended form throughout its lifecycle.

Rotary dryers are the industrial dryer of choice for mineral drying applications. Mineral drum dryer design varies based on the unique characteristics of the mineral to be processed. In general, however, one can assume that a dryer intended for mineral processing will meet certain objectives required by the industry:

Outside of these considerations, the characteristics of the mineral to be processed will largely dictate the dryer design, influencing factors such as retention time, length and diameter, air flow configuration (co-current or counter-current flow), and more. When processing potash, for example, a co-current air flow is used to avoid excess attrition and discoloring of the product that could occur with a counter-current configuration.

The variation in mineral types and characteristics often merits a mineral dryer testing program to assess how the material will respond to drying and subsequently, how the dryer must be designed to work best with the material.

In this setting, batch- and pilot-scale testing are conducted to gather initial process data and scale up the process to aid in the design of a commercial-scale mineral dryer. Various particle characteristics can be targeted during testing to refine the product and ensure an optimal drying solution.

The ability to control the moisture content of a mineral whether raw ore or end product is essential to the mineral processing industry, providing economic, handling, and processing benefits and allowing a premium product to be produced.

Rotary dryers have proven to be an ideal industrial dryer for meeting the demanding processing conditions required by the industry. Providing mineral processing solutions since 1951, FEECO is the global leader in custom rotary dryers for the diverse needs of the mineral processing industry. In addition to our custom dryers, we also offer a wide array of mineral processing equipment, as well as batch and pilot testing capabilities for process and product design. For more information on our mineral processing capabilities, contact us today!

major mines & projects | montepuez project

major mines & projects | montepuez project

The Montepuez Graphite Project is located within the Xixano Complex and traverses the tectonic contacts between the Nairoto, Xixano and Montepuez Complexes. The Xixano Complex includes a variety of metasupracrustal rocks enveloping predominantly mafic igneous rocks and granulites that form the core of a regional north-northeast to south-southwest trending synform. Graphite-bearing mica schist and gneiss are found in the Xixano Complex. Locally, graphitic schists occur with dolerites, meta-sediments, amphibolites and minor intrusions of cross-cutting pegmatite veins. Graphite forms as a result of high-grade metamorphism of organic carbonaceous matter and vanadiumbearing minerals such as roscoelite occur as secondary minerals.The 8770C license occurs on the Xixano Complex and traverse the tectonic contacts between the Nairoto, Xixano and Montepuez Complexes. The Xixano Complex includes a variety of metasupracrustal rocks enveloping predominantly mafic igneous rocks and granulites that form the core of a regional north-northeast to south-southwest-trending synform. The paragneisses include mica gneiss and schist, quartzfeldspar gneiss, metasandstone, quartzite and marble.The metamorphic grade in the paragneiss is dominantly amphibolite facies, although granulitefacies rocks occur locally in the region. The oldest dated rock in the Xixano Complex is a weakly deformed meta-rhyolite which is interlayed in the meta-supracrustal rocks and which gives a reliable extrusion age of 818 +/-10 Ma.Graphite-bearing mica schist and gneiss are found in different tectonic complexes in the Cabo Delgado Province of Mozambique. Local geology comprises dolerite, meta-sediments, amphibolites, psammite with graphitic metasediments and graphitic schists.At Elephant deposit the metamorphic banding and foliation strike about 005 and the GSQF dips moderately steep west. At Buffalo the deformation strained zone of GSQF, psammite and amphibolite exhibit brittle and brittle-ductile structures that intersect eachother, the deformation zone is where graphite mineralisation is located and part of a regional metamorphic and deformation event.The Montepuez deposits are disseminated with graphite dispersed within gneiss. The graphite forms as a result of high grade metamorphism of organic carbonaceous matter, the protolith in which the graphite has formed may have been globular carbon, composite flakes, homogenous flakes or crystalline graphite.The geology at Buffalo is complex and comprises a syncline, with the majority of the graphitic schist package occurring on the eastern limb; bound by amphibolite. The drilling is angled toward the east and is likely to be 70 to 90% of true width.The geology at Elephant is less structurally complex than Buffalo and comprises a moderately steep westerly graphitic schist package bound by amphibolite and notable psammite in the southern portion of the orebody.The Buffalo Mineral Resource area extends over a north-south strike length of 900m (from 8,585,065mN 8,585,965mN), has a maximum width of 295m (470,855mE 471,150mE) and includes the 280m vertical interval from 410mRL to 130mRL.The Elephant Mineral Resource area extends over a south southwest-north northeast strike length of 2.4km (from 8,583,970mN 8,586,330mN), has a maximum width of 255m (469,055mE 469,310mE) and includes the 180m vertical interval from 400mRL to 220mRL.

A mining schedule was developed based on mining of the pit designs for the Elephant and Buffalo deposits. The mining rate was determined based on the processing plant target production of 100 ktpa at 96% TGC. A commissioning and ramp-up period of 12 months is included in the mine schedule. Over the life of the project, the throughput rate is expected to vary between 1.5Mtpa (weathered) and 1.34Mtpa (fresh). Ore Resource to Reserve conversion is 86% for Buffalo and 77% for Elephant calculated by contained graphite. Mining will commence at the Buffalo pit for the first 4 years. A nine month pre-strip period is scheduled to provide sufficient waste to construct the ROM pad. After mining the shallow ore from Buffalo, the mining fleet will move to Elephant to mine the shallow ore in year 5. Over the first 7 years of production the strip ratio will be extremely low, approximately 0.2 (waste to ore ratio), and the mining rate will be approximately 1.7Mtpa (including ore and waste). After 7 years, an additional mining fleet will need to be mobilised to enable mining cutbacks at both Buffalo and Elephant pits simultaneously. At this time the mining rate will increase to approximately 3.2Mtpa. Overall, the strip ratio for the life of mine is estimated to be 0.6 (waste to ore ratio) and the life of mining (including pre-strip) is 27 years of the current Ore Reserve, which remains open along strike. Following the cessation of mining the remaining long-term stockpiles will be treated over a period of 4 years.Mining of Buffalo and Elephant deposits will be by conventional open pit mining methods, using 90t excavators and 40t articulated dump trucks. The upper Saprolite layer is expected to be freely dug down to an estimated 5-15m for Buffalo and 10-20m for Elephant. The fresh deposit will require blasting. The orebody is wide and continuous above the cut-off grade, leading to a reasonably low level of dilution and ore loss, which were estimated to be approximately 4% and 2% TGC respectively. The cut-off grade was determined through the application of project unit operating costs and recoveries. The recoveries were determined by deposit scale geometallurgical assessment of samples representative of the variable lithology types, weathering and TGC% grade ranges. The Ore Reserve cut-off grades were calculated to range between 2.9% TGC and 3.6% TGC depending on deposit and weathering classification. An elevated cut-off grade of 4% TGC was applied to the Ore Reserve for various technical and economic reasons.Pit designs were based on Whittle pit optimisations for each deposit considering final project unit costs, prices, recoveries and geotechnical inputs. The pit optimisations were constrained within thelimits of the Indicated Resource for each deposit. The final Buffalo pit will be approximately 90m deep, and the designed Elephant pit will be approximately 150m deep.Each pit will have a single waste dump, located to the east of each pit. Pit ramps will be orientated to ensure that both ore and waste haulage distances are minimised. Long-term stockpiles will be located between each deposit and the ROM pad. The ROM is located mid-way between the pits to balance haulage costs.

The Montepuez process flowsheet comprises: ROM pad, with designated stockpile areas and ability to blend ore on pad or in ROM bin. Primary jaw crusher and crushed ore stockpile (COS) Primary closed circuit SAG mill. Rougher flotation. Three stages of concentrate regrinding and four stages of concentrate cleaning. Concentrate filtration. Concentrate drying, screening, and bagging. Tails thickening and disposal. Water and Air services. Reagents

Projected Production: Test work has been conducted to demonstrate that V2O5 can be extracted as a by-product of graphite processing at the Project. Tailings from the graphite plant will undergo a secondary process that involves further grinding to liberate Vanadium minerals (predominantly roscoelite) and a two stage magnetic separation process with stage 1 removing high iron gangue and stage 2 recovering the Vanadiumto the magnetic fraction. The Vanadium rich magnetic fraction recovered from the magnetic recovery circuit contains approximately 75% of the Vanadiumin the graphite plant tailings. This material, upgraded to approximately 1.3% V2O5, will form the feed to a standard roast and leach process to recover the Vanadium content as a V2O5 product.

products in laundry packages on us appliance

products in laundry packages on us appliance

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case studies bradken

case studies bradken

With the installation of Bradken shoes on the sites shovels the site has improved production rates, efficiency and safety by eliminating unplanned downtime due to shoe failure and maintenance. They can now typically achieve 25k hours at this site, where the OEM tracks rarely achieve more than 15k hours.

Bradken Eclipse Solid points resulted in a longer service life with an average of 298,700 BCM per set of points. The average life span of Bradkens Eclipse Solid points was 14-20 days, depending on digging conditions. This was a dramatic improvement compared to the previous competitors points that lasted only 4-8 days on average.

The Vulcabrix ZTA ceramic liners have been installed in the Flash Float Floor for 50 weeks and have more than 50% of their initial service life remaining. These preliminary results estimate the service life of the Vulcabrix ZTA ceramic liners to be 100 weeks, or an increase of 285% in service life compared to the 92% Alumina ceramic liners, enough to last at least 7 shut cycles.

The OEM crawler shoes achieved only 17,000 hours with 46 broken shoes during operation. Comparably the new Bradken crawler shoes achieved 23,000 hours with no broken shoes. This 35% improvement in shoe life provided direct benefits to the customer in cost reductions, machine uptime and safety.

The customer was pleased with the Bradken PPS30PLB Eclipse Solid points and the trial showed they are ideal for use on large excavators working in varied and extreme digging conditions such as double benching and digging un-shot coal. Effective penetration was maintained throughout the duration of the trial.

The liner package redesign resulted in lower costs, with a 1600% (6 weeks to 104 weeks) improvement in liner life and 24 months plus potential operational life continual service. The package processed 26 million tons of screened primary crushed ore for the sites six Ball Mills mills during its campaign.

The new liner design improved reline safety for the operation by removing a total of 60 loose steel corners liners and reducing the overall liner set mass by 19,644kgs. The reduction in parts saved 12 hours per mill reline, resulting in increased equipment availability.

Bradken collaborated with a large gold mine in West Africa and leveraged its expertise to provide a solution that increased the customers machine availability by 560hrs and reduced GET change-out by 50% on their 6060 Face Shovel and 6060 Backhoe machines.

Bradken has engineered a revolutionary weld overlay material that provides superior wear performance and impact resistance. Unlike traditional chromium carbide overlays, our proprietary weld chemistry creates an incredibly fine microstructure which results in substantial performance improvements when compared to existing products.

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