processing chromite ore flux material
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processing chromite ore flux material

v118n6a15 Fluxing of South African chromite ore with ...

2019-5-9  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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Fusion of Chromite Ore Using Sodium Phosphate Salt as

2021-4-5  In hydrometallurgy, fusion techniques are considered key in the processing of chromite ore. Salts containing easily ionized elements are often used as flux, which results in solutions with complicated matrices. A matrix correction approach was developed to remove sodium and phosphate ions from a solution obtained from the fusion of chromite using sodium phosphate salt as flux. The

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Fluxing of South African chromite ore with colemanite

2018-12-18  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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Identification and Description of Mineral Processing ...

2016-3-27  If the chromite mineral occurs in fine grains intermixed with host rock, crushing, gravity separation and magnetic separation may be used.9 Chromite ore is typically beneficiated before it is sold, hence many of these operations may not be conducted in the United States. 10 Exhibit 2 is a conceptual diagram of chromite ore processing.

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v117n11a9 SEM image processing as an alternative

2018-1-23  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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An Improved DC-Arc Process for Chromite Smelting

2012-2-7  preheated using the DC arc furnace. Chromite ore types 1 and 2 were preheated to 950°C by thermal treatment in a 4-stage cyclone preheater with an integrated calcining loop (Figure 2). The tests were carried out at a continuous feed rate of 37 kg/h. In order to reach and maintain material temperatures of ~950°C, hot

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Chromium steel from chromite ore processing residue — A ...

2011-5-7  As species we humans generate excessive amounts of waste and hence for sustainability we should explore innovative ways to recover them. The primary objective of this study is to demonstrate an efficient and optimum way to recover chromium and iron from chromite ore processing residues (COPR) for the production of chrome steel and stainless steel. In Hudson County, New Jersey, there are more ...

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Case Study: Chromite mining and processing

Chromium mining and processing In nature, chromium is found as chromite ore, composed of elemental iron, oxygen and chromium (FeOCr 2 O 3). 1,2 heavily in about a 700 m vicinity around the Countries with commercially significant chromite mines include Russia, South Africa, Zimbabwe, Turkey, the Philippines and India.2 Chromite ore is initially

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TheMelting Behaviour ofChromite Ores and the

2012-12-3  the chromite ore takes place mainly in the softening zone, and not in the slag layer. By the time the mixture of initial slag and charge material moves downwards to the slag layer, the chromjum reduction is nearly complete. There is a small difference in slag composition with time. The tendency of change in chemical composition is obvious.

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Detoxification and immobilization of chromite ore ...

2020-7-1  Reduction/immobilization of chromite ore processing residue using composite materials based geopolymer coupled with zero-valent iron Ceram. Int. , 44 ( 2018 ) , pp. 3454 - 3463 , 10.1016/j.ceramint.2017.11.148

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Fluxing of South African chromite ore with colemanite

2018-12-18  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).

Read More
Fusion of Chromite Ore Using Sodium Phosphate Salt as

In hydrometallurgy, fusion techniques are considered key in the processing of chromite ore. Salts containing easily ionized elements are often used as flux, which results in solutions with complicated matrices. A matrix correction approach was developed to remove sodium and phosphate ions from a solution obtained from the fusion of chromite using sodium phosphate salt as flux.

Read More
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

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Metso Chromite Ore Gravity Mining Processing Plant ...

2021-10-20  Metso Most of the chrome ores around the world are beneficiated by gravity concentration techniques. A conventional chromite ore beneficiation process plant (Figure 3) consist of two sections: Communition (for preparing the material for the subsequent unit operations) Concentration (classification and beneficiation). Author: Y. Rama Murthy, S.K. TripathyPublish Year: 2020Images for Chromite ...

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TheMelting Behaviour ofChromite Ores and the

2012-12-3  the chromite ore takes place mainly in the softening zone, and not in the slag layer. By the time the mixture of initial slag and charge material moves downwards to the slag layer, the chromjum reduction is nearly complete. There is a small difference in slag composition with time. The tendency of change in chemical composition is obvious.

Read More
Chromium steel from chromite ore processing residue — A ...

2011-5-7  As species we humans generate excessive amounts of waste and hence for sustainability we should explore innovative ways to recover them. The primary objective of this study is to demonstrate an efficient and optimum way to recover chromium and iron from chromite ore processing residues (COPR) for the production of chrome steel and stainless steel. In Hudson County, New Jersey, there are more ...

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The salt extraction process: a novel route for metal ...

2018-6-11  The present paper focuses on the recovery of metal values, primarily Cr and Fe, from electric arc furnace slag and chromite ore. The impact of different factors to the dissolution of slag, such as temperature, holding time, flux content and weight ratio of flux/slag was studied.

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Chromium—A National Mineral Commodity Perspective

2007-7-17  90% of chromite ore consumption. Ferrochromium production is an electrical-energy intensive process that requires chromite ore, fluxes (quartzite), and carbon (e.g., coal, coke, charcoal). Ferrochromium production, like chromite ore production, is geographically concentrated in the Eastern hemisphere; however, it is more

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Solidification/stabilization of chromite ore processing ...

2017-2-1  In the process of chromium salt production, large amount of chromite ore processing residues (COPR) are generated (Zhang et al., 2009, Brose and James, 2013, Kameswari et al., 2015). COPR comprises of water and acid soluble hexavalent chromium ions, which is highly mobile and its toxicity is far greater than relative stability of Cr 3+ ions.

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Chromite: The only mineral ore of chromium metal

Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4 ). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite

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Solidification/stabilization of chromite ore processing ...

2017-2-1  In the process of chromium salt production, large amount of chromite ore processing residues (COPR) are generated (Zhang et al., 2009, Brose and James, 2013, Kameswari et al., 2015). COPR comprises of water and acid soluble hexavalent chromium ions, which is highly mobile and its toxicity is far greater than relative stability of Cr 3+ ions.

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Chromium Ore Processing Residue - Maryland

2021-7-31  area in the floodplain into which harbor dredge material was staged and dewatered. Included in the permit for wetlands construction MPA was allowed to accept clean granular inorganic fill material into these cells. It is suspected that “clean granular inorganic fill material” was used as a euphemism for “chromite ore processing residual.”

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Chromite Ore Processing Residue in Hudson County,

Chromite ore processing residue is an industrial waste material generated by the manufacturing of chromates for chromite ore. Chromium is present in the trivalent state in the ore as chromium iron oxide (FeCr204). In this state, the chromium is inert and is not soluble in either acid or water. To produce the hexavalent, water-soluble

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Solidification/stabilization of chromite ore processing ...

Chromite Ore Processing Residue (COPR) produced in chromium salt production process causes a great ... cementitious material was compared with that of alkali-activated BFS-FA binder. X-ray ...

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Chromite Beneficiation Process

2016-4-12  Chromite Grinding. The 36″x 8′ Adjustable Stroke Ore Feeder is used to accurately control feed of crushed ore to the grinding section. Before it is fed to the 4’x 8′ Peripheral Discharge Rod Mill, the minus ¼” chrome ore is removed from the grinding

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Characterization and Beneficiation of Anka Chromite Ore ...

2013-12-24  particle size to facilitate further processes.[7]. Chromite ore is beneficiated for processing using several methods, depending on the ore source and the end use requirements. Coarse clean ore is hand sorted, while the fine clean ore is gravity separated. Lumpy ore mixed with host rock may require heavy medium separation.

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Case Study: Chromite mining and processing

Chromium mining and processing In nature, chromium is found as chromite ore, composed of elemental iron, oxygen and chromium (FeOCr 2 O 3). 1,2 heavily in about a 700 m vicinity around the Countries with commercially significant chromite mines include Russia, South Africa, Zimbabwe, Turkey, the Philippines and India.2 Chromite ore is initially

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(PDF) A Review of Chromite Ore Processing Residue (COPR ...

Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium (Cr[VI]). Although the high temperature chromite process was ...

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Leaching of hexavalent chromium from young chromite

2020-3-18  The material is a hazardous waste derived from the extraction of chromate (CrO 4 2−) from ground and roasted chromite ores. In the roasting process, insoluble trivalent chromium [Cr(III)] present in the ores oxidizes to soluble hexavalent Cr [Cr(VI)], which is then recovered by aqueous leaching for further processing (Burke et al., 1991).

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11.5 Refractory Manufacturing

2015-9-10  from the ore crushing, grinding, material drying and storage, and brick firing and finishing processes used in producing these types of refractories. Tables 11.5-4 and 11.5-5 present emission factors for emissions of filterable PM, filterable PM-10, hexavalent chromium, and total chromium from the drying and firing of chromite-magnesite ore.

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