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Chromite Ores, Mining, Processing Britannica

1998.7.20  Category: Science Tech chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr 2 O 4) that is

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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

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Chromite - an overview ScienceDirect Topics

Chromite is an oxide mineral belonging to the spinel group, a complex mineral containing magnesium, iron, aluminum, and Cr in varying proportions, depending on the deposit,

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Chromium Ore - an overview ScienceDirect Topics

The main component of the chromium ore is chromite FeCr 2 O 4. The ores extensively dispersed in natural deposits and generally contaminated with Mg, Si, Al, and O. The

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Chromite: Mineral information, data and localities.

Chromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite

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Towards holistic technology solution to chromite ore ... - Springer

2021.1.4  Pilot scale treatment of chromite ore processing residue using sodium sulfide and comparative study of alkali roasting (Antonio et al. 2012) and leaching of

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Microstructural Analyses of Cr(VI) Speciation in Chromite Ore ...

Synchrotron microstructural analyses of chromite ore processing residue showed that up to 50% of the hexavalent chromium is bound in inaccessible, hard-to-dissolve minerals.

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Pyrolysis Treatment of Chromite Ore Processing Residue by

2016.2.10  The pyrolysis treatment with biomass is a promising technology for the remediation of chromite-ore-processing residue (COPR). However, the mechanism of

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Special Issue "Chromite Deposits: Mineralogy, Petrology and

2022.2.10  This Special Issue will focus on recent advances in the study of geology, mineralogy, and geochemistry of chromite deposits from different geological settings for

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Processes Free Full-Text Recycling of Chrome

2023.5.29  Prolonged development of ore deposits, ore beneficiation and metallurgical smelting of concentrates result in the accumulation of wastes, forming large-scale dumps and sludge ponds negatively

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What is chromite (chrome) ore and where is it found

Chrome ore is found in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or weathering. There are two main

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Chrome ore beneficiation challenges opportunities – A review

2011.4.1  Review of the research works. The critical issues related to the chromite process plants investigated by various researchers have been categorized as: 5.1. Reducing the tailing losses (9–20% Cr 2 O 3 ). 5.2. Beneficiation of low and sub-grade chromite ore (10–30% Cr 2 O 3 ). 5.3.

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Automated and Quantitative Mineralogy Applied to Chromite Ore

2023.2.16  A characterization study of chromite ore from South Africa was conducted using bulk assays, X-ray diffraction, optical, scanning electron microscopy (SEM), automated electron probe microanalysis (EPMA) and quantitative evaluation of mineral by scanning electron microscopy (QEMSCAN) mineralogical techniques, and quantitative EPMA. The

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Chromite Ores, Mining, Processing Britannica

chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr 2 O 4) that is the chief commercial source of chromium.It is the principal member of the spinel series of chromium oxides; the other naturally occurring member is magnesiochromite, oxide of magnesium and chromium (MgCr 2 O 4).Chromite is commonly found as brittle

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Selective Flocculation of Chromite Tailings Transactions of the ...

2021.1.23  Odisha state is the major reserve of the chromite ore. Due to the extensive applications, high-grade chromite ore is getting depleted day by day. Now it is a challenge for the industry to utilize these low-grade ores and tailings. Several attempts were taken to upgrade the low-grade chrome ores and tailings using different gravity

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Sufficient extraction of Cr from chromium ore processing residue

2022.8.1  DOI: 10.1016/j.jhazmat.2022.129754 Corpus ID: 251507844; Sufficient extraction of Cr from chromium ore processing residue (COPR) by selective Mg removal. @article{Zhang2022SufficientEO, title={Sufficient extraction of Cr from chromium ore processing residue (COPR) by selective Mg removal.}, author={Jing Zhang and Wenyu

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Chromite - an overview ScienceDirect Topics

Chromite mining in Turkey started in 1850; since then, Turkey has had an important role in the world chromite market. Turkey produces chromite ore and ferrochrome. It is estimated that Turkey has produced about 45 metric tons of chrome ore. Chromite production is mainly export-oriented. Turkey has one chrome and two ferrochrome chemical plants.

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Optimization of stirred mill parameters for fine grinding of PGE ...

2020.7.23  Optimization of stirred mill parameters for fine grinding of PGE bearing chromite ore, Particulate Science and Technology, DOI: 10.1080/02726351.2020.1795016 To link to this article: doi ...

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A Process Mineralogical Evaluation of Chromite at the Nkomati

2020.8.12  A process mineralogical study based on three texturally and mineralogically different chromite-bearing ore types at the Nkomati nickel mine was undertaken, with focus on chromite. Chromite is a by-product of the Ni-Cu-Co-PGE ore at Nkomati Nickel mine. These being the PCMZ_MG (medium-grade Ni-Cu sulphide silicate

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Preparation of Oxidized Pellets with Chrome Ore SpringerLink

2018.1.19  Compared with the traditional iron ore pellets, the required temperature for roasting chromite pellets is higher. When the calcination temperature ranges from 1200 to 1350 °C, strength of pellets rises from 1431.33 to 1452.96 N/P. (2) (Fe,Mg) (Cr,Fe,Al) 2 O 4 and ferrochromide complex oxides (Cr,Fe,Al) 2 O 3 were formed by the oxidation of (Fe ...

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Chromium (Cr) Ore Minerals, Formation, Deposits

Modified date: 23/04/2023. Chromium (Cr) ore refers to a natural mineral deposit that contains chromium in its raw form. Chromium is a chemical element with the symbol Cr and atomic number 24. It is a hard, lustrous,

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Automated and Quantitative Mineralogy Applied to Chromite Ore

2023.2.16  A characterization study of chromite ore from South Africa was conducted using bulk assays, X-ray diffraction, optical, scanning electron microscopy (SEM), automated electron probe microanalysis (EPMA) and quantitative evaluation of mineral by scanning electron microscopy (QEMSCAN) mineralogical techniques, and quantitative EPMA. The

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The Use of Hydrogen as a Potential Reductant in the Chromite

2022.4.25  The chromium (Cr) content of stainless steel originates from recycled scrap and/or ferrochrome (FeCr), which is mainly produced by the carbothermic reduction of chromite ore. Ever-increasing pressure on FeCr producers to curtail carbon emissions justifies migration from traditional FeCr production routes. The interaction between

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Journal of Environmental Analytical Chemistry

Chromite ore sample: Low grade disseminated chromite ore was collected from different interval locations through the lenses body in Umm Saqata. The samples were lumpy with a total collection weight about 100 kg, then were thoroughly mixed to be homogenous. Finally, thin and polish sections were made for mineralogical analysis from the lumpy ...

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Ore Characterization and Beneficiation - MDPI

2023.3.20  chromite ore to produce chromite for refractory, chemical, and metallurgical markets usually involves crushing and grinding, as well as size sorting. Most chromite ores also require some degree of further beneficiation; this is mainly associated with gravity separation, but can also include magnetic separation or, in some cases,

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Chromite Request PDF - ResearchGate

2016.12.31  Chromite ore (FeOCr 2 O 3) is the most important mineral occurrence of chromium, and some deposits are reported in Anka Local Government Area of Zamfara State.

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Quantitative mineralogical characterization of chrome ore

2015.4.11  A chromite concentrate with 45.29wt% Cr2O3 and a Cr:Fe mass ratio of 1.85 can be produced from these low-grade chromite ore beneficiation plant rejects. Mineralogical characterization and liberation of valuable minerals are primary concerns in mineral processing industries. The present investigation focuses.

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Table 1 . Size wise chemical analysis of the chromite ore

The ore of the study area is low grade contains 21.5% Cr 2 O 3 with the liberation size of chromite mineral in the range (0.30-0.05) mm. The main gangue of the ore is mineral silicates as the ...

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