Showing 01 - 12 of 139 Results

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Chromium processing Britannica

Chromium processing, preparation of the ore for use in various products. Chromium (Cr) is a brilliant, hard, refractory metal that melts at 1,857 °C (3,375 °F) and boils at 2,672 °C (4,842 °F). In the pure state it is resistant to ordinary corrosion, resulting in its application as an electroplated

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Chromite ScienceDirect

Ferrochrome is made by smelting chromite ore in an electric arc furnace with flux materials (quartz, dolomite, limestone, and aluminosilicates) and a carbonaceous reductant (wood chips, coke, or charcoal) (Kleynhans et al., 2012, USEPA,). The solid products obtained

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Fluxing of South African chromite ore with colemanite

chromite smelting, while the UG2 seam is mined as a source of platinum group metals (PGMs). The ‘discard’ streams from UG2 ore processing have become a valuable raw material for ferrochromium producers, as predicted some 14 years ago (Cramer, Basson, & Nelson, 2004).

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v117n11a9 SEM image processing as an alternative method to

that mainly utilize coarse chromite, flux, and carbonaceous reductant feed materials. This process requires the lowest capital input, since minimal pre-processing of the feed materials is necessary. However, it is the least environmentally friendly and the least efficient in terms of Cr recovery and specific energy consumption (SEC), i.e.

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SOME ASPECTS OF THE PRODUCTION OF FERROCHROME

are buried in the burden of lumpy materials comprised of chromite ores or pellets, reductants and fluxes. Mintek has developed and patented the smelting of chromite ores in DC electric open-arc furnaces; principally for the processing of ore fines of sizes less than 1 mm without the need for agglomeration.

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An Improved DC-Arc Process for Chromite Smelting

The test results proved to be very promising, as all materials could be heated up to ~950°C individually as well as in mixtures with low decrepitation and fines formation. Agglomeration of the fines did not occur. Table 1. Chemical analysis of test materials. Test Material Chromite ore 1 Chromite ore 2 Chromite ore 3 Anthracite Coal 1 Coal 2 Lime

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chromite mining processing flow diagram

Identification and Description of Mineral Processing Sectors and Generalized Process Flow Diagram. Ferrochromium. Ferrochromium is made by smelting chromite ore in an electric arc furnace with flux materials (quartz,.

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v118n6a15 Fluxing of South African chromite ore with

The chromite feed material is often pelletized and then either prereduced or sintered before it is charged to a SAF. A broad outline of process operations for ferrochrome production in South Africa is given in Figure 1. Note, that it is no longer common for most producers to use lumpy ore as primary feed material

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v118n6a15 Fluxing of South African chromite ore with

The chromite feed material is often pelletized and then either prereduced or sintered before it is charged to a SAF. A broad outline of process operations for ferrochrome production in South Africa is given in Figure 1. Note, that it is no longer common for most producers to use lumpy ore as primary feed material

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flow sheet of processing chromite BINQ Mining

The principal flow sheet of the green metallurgical process for chromite ore. 160. S. A new flowsheet for processing chromite fines by column flotation and the collector adsorption mechanism. Ferrochromium is made by smelting chromite ore in an electric arc furnace with flux materials

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Chromite Wikipedia

Chromite ore can be mined to produce chromite concentrate. It can also be crushed and processed. Chromite concentrate, when combined with a reductant such as coal or coke and a high temperature furnace can produce ferrochrome. Ferrochrome is a type of ferroalloy that is an alloy in between chromium and iron.

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Identification and Description of Mineral Processing

Ferrochromium is made by smelting chromite ore in an electric arc furnace with flux materials (quartz, dolomite, limestone, and aluminosilicates) and a carbonaceo us reductant (wood chips, coke, or charcoal.) Lumpy ore may be fed directly to the furnace, while finer ore must be agglomerated before it is added to the furnace. In efficiently

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Chromium Cleanup Partnership

Chromite ore processing in Hudson County ends. During its lifetime, Hudson County's chrome industry generated approximately 2 million tons of residue, which was later determined to be a hazardous material. 1982 Jersey City and New Jersey Department of Environmental Protection begin identifying chromite ore processing residue sites. 1982-89

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chromite processing and recovery ferrochrome

Case Study: Chromite mining and processing oahpp.ca. chromium.17,18 Ferrochromium is the leading end use of chromite ore.19 Smelting occurs with flux materials (quartz, dolomite, or limestone) and a carbonbased reductant (coke, wood chips, or charcoal).

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KPMG commodity insights bulletin chromite

of chrome ore that is produced in South Africa is exported for smelting into ferrochrome which is then processed into stainless steel8. Zimbabwe Zimbabwe is historically the second largest location for chromite reserves, accounting for approximately 12 percent of the global chromite reserves. Zimbabwe chrome ore production

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Characterisation and Pre-concentration of Chromite Values

Generally for processing chromite ores, different types of gravity The Tata Steel Chrome Ore Beneficiation (COB) plant is generating 50 tph of tailings assaying 17% Cr2O3. A critical review on practice of the plant operating personnel is concerned in the grade-recovery FDS is an efficient hydraulic classifier for classify the material

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US3336102A Process of roasting chromite ore to produce

US3336102A US602425A US60242566A US3336102A US 3336102 A US3336102 A US 3336102A US 602425 A US602425 A US 602425A US 60242566 A US60242566 A US 60242566A US 3336102 A US3336102 A US 3336102A Authority US United States Prior art keywords ore chromium percent roasting layer Prior art date 1966-12-16 Legal status (The legal status is an assumption and is not a

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Chromite an overview ScienceDirect Topics

In Mineral Processing Design and Operations (Second Edition), 2016. 17.4.5 Chrome Spinels Chromites [FeCr 2 O 4]. Chromite is an end member of a complete solid solution series between naturally occurring chromites contain iron and magnesium as substituting impurities with chromium oxide. The other end member is magnesiochromite (MgCr 2 O 4).Chromite ore is usually a combination of spinels with

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Optimization of Process Parameter for Smelting and

3.3 Smelting of Chromite ore pellets having Cr/ Fe ratio 2.8 ratio 2.8 was carried out in a 100 KVA SAF. Furnace was pre-heated and charged with the charge mix which contains 40 kg of Chromite ore pellets and 13 kg of the nut coke for reduction of the Chromite ore pellets and 1.4 kg of the lime stone and

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chromite Smelter Process Solution For Ore Mining

Mining Equipments Solution Stone Crushing Sand Making Ore Processing Grinding Plant Construction Building Material. Home > Mine > chromite smelter process. chromite smelter process. Chromite Wikipedia, the free encyclopedia. Chromite is an iron chromium oxide: FeCr 2 O 4. It is an oxide mineral belonging to the spinel group.

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Chromite Ore Processing Plants Chromite Ore Processing

Chromite Ore Processing Plant. Star Trace offers turnkey solutions for Chromite Ore Processing Plants. We are one of the leading project suppliers for chromite ore processing plants and we work closely with our customers to fulfill their specific needs for a customized packaged solution.

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Effect of additions of aluminosilicate and silicate

The temperatures of the beginning and end of softening and the temperature range of softening of the fines of the rich chromite ore of the Donskoy Ore Mining & Processing Effect of additions of aluminosilicate and silicate materials on the softening temperature of chromite ore Chromite Kazakhstan RUSSIAN Metallurgy Silicate Material

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Characterisation and Pre-concentration of Chromite Values

Generally for processing chromite ores, different types of gravity The Tata Steel Chrome Ore Beneficiation (COB) plant is generating 50 tph of tailings assaying 17% Cr2O3. A critical review on practice of the plant operating personnel is concerned in the grade-recovery FDS is an efficient hydraulic classifier for classify the material

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US3336102A Process of roasting chromite ore to produce

US3336102A US602425A US60242566A US3336102A US 3336102 A US3336102 A US 3336102A US 602425 A US602425 A US 602425A US 60242566 A US60242566 A US 60242566A US 3336102 A US3336102 A US 3336102A Authority US United States Prior art keywords ore chromium percent roasting layer Prior art date 1966-12-16 Legal status (The legal status is an assumption and is not a

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Optimization of Process Parameter for Smelting and

3.3 Smelting of Chromite ore pellets having Cr/ Fe ratio 2.8 ratio 2.8 was carried out in a 100 KVA SAF. Furnace was pre-heated and charged with the charge mix which contains 40 kg of Chromite ore pellets and 13 kg of the nut coke for reduction of the Chromite ore pellets and 1.4 kg of the lime stone and

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chromite Smelter Process Solution For Ore Mining

Mining Equipments Solution Stone Crushing Sand Making Ore Processing Grinding Plant Construction Building Material. Home > Mine > chromite smelter process. chromite smelter process. Chromite Wikipedia, the free encyclopedia. Chromite is an iron chromium oxide: FeCr 2 O 4. It is an oxide mineral belonging to the spinel group.

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Chromite Ore Processing Plants Chromite Ore Processing

Chromite Ore Processing Plant. Star Trace offers turnkey solutions for Chromite Ore Processing Plants. We are one of the leading project suppliers for chromite ore processing plants and we work closely with our customers to fulfill their specific needs for a customized packaged solution.

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US4295881A Process for extraction of platinum group

A process for treating chromite-bearing ores to obtain useful mineral values, especially platinum group metal, therefrom wherein the ore is separated into magnetic and non-magnetic fractions; the non-magnetic fraction, containing a substantial portion of the platinum group metals, is concentrated and smelted to produce a metal layer containing platinum group metals; and the platinum group

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chromite smelting slag processing to get ferrochrome YouTube

May 21, 2016· Chromite smelting slag processing line is mainly to recover the chromite alloy from the chrome smelting slag. For this processing line, not only the smelting alloy can be recovered, but also the

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Effect of additions of aluminosilicate and silicate

The temperatures of the beginning and end of softening and the temperature range of softening of the fines of the rich chromite ore of the Donskoy Ore Mining & Processing Effect of additions of aluminosilicate and silicate materials on the softening temperature of chromite ore Chromite Kazakhstan RUSSIAN Metallurgy Silicate Material

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Case Study: 1.2TPH Chromite Ore Beneficiation Process Flow

Mineral Processing Cases study: 1.2TPH Chromite ore beneficiation process flow for Italy customer, how processing plant configurated and what equipments were used? Read more You may also interest in the Chrome ore property and processing methods.

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Chromite an overview ScienceDirect Topics

In Mineral Processing Design and Operations (Second Edition), 2016. 17.4.5 Chrome Spinels Chromites [FeCr 2 O 4]. Chromite is an end member of a complete solid solution series between naturally occurring chromites contain iron and magnesium as substituting impurities with chromium oxide. The other end member is magnesiochromite (MgCr 2 O 4).Chromite ore is usually a combination of spinels with

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Smelting of high-carbon ferrochrome from chromium

Apr 28, 2017· In a test melts, high-carbon ferrochrome is produced from chrome sinter and chrome-ore fines in an arc electrofurnace. Two types of sinter with the best performance—the best sintering rate, strength, and product yield—are studied. It is demonstrated by experimental melts that high-carbon ferrochrome can be produced from proposed agglomerates.

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Chrome ore beneficiation challenges & opportunities A review

The low chromium‐to‐iron ratio of chromite ores is an important issue in some chromite deposits. The value of the chromite ore is indeed dictated in the market by its iron, as well as its

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Ferrochrome Wikipedia

Ferrochrome, or Ferrochromium (FeCr) is a type of ferroalloy, that is, an alloy between chromium and iron, generally containing 50% to 70% chromium by weight.. Ferrochrome is produced by electric arc carbothermic reduction of chromite.Most of the world's ferrochrome is produced in South Africa, Kazakhstan and India, which have large domestic chromite resources.

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11.5 Refractory Manufacturing US EPA

Refractory manufacturing involves four processes: raw material processing, forming, firing, and final processing. Figure 11.5-1 illustrates the refractory manufacturing process. Raw material processing consists of crushing and grinding raw materials, followed if necessary by size classification and raw materials calcining and drying.

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Chrome ore beneficiation challenges & opportunities A review

The low chromium‐to‐iron ratio of chromite ores is an important issue in some chromite deposits. The value of the chromite ore is indeed dictated in the market by its iron, as well as its

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Ferrochrome Wikipedia

Ferrochrome, or Ferrochromium (FeCr) is a type of ferroalloy, that is, an alloy between chromium and iron, generally containing 50% to 70% chromium by weight.. Ferrochrome is produced by electric arc carbothermic reduction of chromite.Most of the world's ferrochrome is produced in South Africa, Kazakhstan and India, which have large domestic chromite resources.

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COAL BASED DIRECT REDUCTION OF PREOXIDIZED

3.1 Preoxidation of Chromite Ore The raw chromite ore is oxidized in air for 2h duration at 900 0C using the chamber furnace. This pre-oxidized chromite ore is used as base material for the reduction studies. As the iron is present in the form of FeO in Indian chrome spinel, during oxidation reaction, the FeO present in spinel gets

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High-Intensity Magnetic Separation Processing of

Processing of Ferruginous Chromite Ore by Dry High-Intensity Magnetic Separation Sunil Kumar Tripathy, Y. Rama Murthy, Veerendra Singh, and Nikkam Suresh*

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Podiform Chromite Deposits—Database and Grade and

chromite mines have produced 57.4 percent of the world’s total chromite production (Stowe, 1987b). In 2010, about 25 percent of the world’s chromite production came from podi-form chromite deposits, and this percentage has held for the past 50 years (Papp, 2011; Leblanc, 1987). Podiform chro-

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Characterization and Beneficiation of Anka Chromite Ore

CHARACTERIZATION AND BENEFICIATION OF ANKA CHROMITE ORE USING MAGNETIC SEPARATION PROCESS Chromite ore is beneficiated for processing using several methods, depending on the ore source and the end use requirements. All materials are affected in some way when placed in a magnetic .

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A comparative study for smelting of chromite ore, pellets

For this purpose, in the present study, the smelting of chromite pellets, briquettes, sinter and lump ore has been carried out in an electric arc furnace of 50 kVA. The energy consumption, yield, Cr recovery and quality of Fe–Cr produced have been compared for different Cr bearing materials.

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Stratiform Chromite Deposit Model USGS

Fine and coarse materials, which have been crushed and ground, are separated either by gravity or electromagnetic methods. The concentrate is then sent to one of three types of beneficiation plants for processing. Chromite ore-processing facilities commonly are near or at the mine sites although some plants are fed by several mines.

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Reducing energy consumption by alternative processing

The carbothermic reduction of chromite ore to produce high carbon ferrochromium is among the most energy intensive metal extraction processes performed, due not only to the highly endothermic nature of the reduction reactions but also the very high operating temperatures required for the smelting operation to separate the chrome-containing alloy from the discard slag.

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11.5 Refractory Manufacturing US EPA

Refractory manufacturing involves four processes: raw material processing, forming, firing, and final processing. Figure 11.5-1 illustrates the refractory manufacturing process. Raw material processing consists of crushing and grinding raw materials, followed if necessary by size classification and raw materials calcining and drying.

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Iron Chromite Material Safety Data Sheet

This ore and the un-reacted ore component of the chromite ore processing residue are exempt from the reporting requirements under Section 313 of the Emergency Planning and Community Right-To-Know Act of 1986 (EPCRA) and Section 6607 of the Pollution Prevention Act of 1990 (PPA). Iron Chromite Material Safety Data Sheet Keywords: MSDS

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Baxodwala Managing assets, unlocking value.

We connect the logistics chain by subsequently processing the chromite ore into ferrochrome and trading this product on the global market. Long term job creation Working closely with public bodies, we offer the local population training opportunities and qualification measures in the field of raw material

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Chromite ore processing using STEINERT XSS YouTube

Nov 30, 2014· pouring a smelt a gold bar from ore material Duration: TATA STEEL SUKINDA CHROMITE MINES JOURNEY TO EXCELLENCE Amazing Homemade Log Splitter Wood Processing Machines

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The salt extraction process: a novel route for metal

AbstractThe present work is part of an investigation towards the development of a process route for the extraction of metal values from slag, low grade ores and other oxidic materials such as spent refractories using molten salts in the temperature range 800–950°C. The present paper focuses on the recovery of metal values, primarily Cr and Fe, from electric arc furnace slag and chromite ore.