extraction of chromium from ore

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  3 Typical flow sheet for chromium chemical production.

  Adapted from Darrie, G., 2001. Commercial extraction technology and process waste disposal in the manufacture of chromium chemicals from ore.

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  Effective Extraction of Cr(VI) from Hazardous Gypsum Sludge …

  20181024 · Through controlling the phase transformation and chromium species under hydrothermal condition, the Cr(VI) was extracted fully from hazardous Cr(VI)-containing gypsum sludge, with a very high efficiency of more than 99.5%. Scanning transmission electron microscopy, X-ray absorption fine structure, and density functional …

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  Extraction of Cr(VI) from chromite ore processing residue via ...

  202071 · Semantic Scholar extracted view of "Extraction of Cr(VI) from chromite ore processing residue via hydrothermal-assisted phase transformation" by Xiaofeng Mo et al.

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  Extraction, phase transformation and kinetics of valuable …

  (NH 4) 2 SO 4 roasting followed by water leaching to process nickel- chromium mixed metal oxidized (MO) ore was investigated. The optimal operating parameters were obtained after determining the influences of the molar ratio of (NH 4) 2 SO 4 to mixed oxidized ore, roasting temperature and roasting time on metal extractions. The extraction efficiencies of Ni, Fe, …

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  Selective extraction of vanadium from chromium by pure [C

  2014627 · Due to their similar chemical characteristics, vanadium and chromium are normally associated in the ore, such as vanadium titano-magnetite ore. In industry, this ore is melted in the blast furnace or electric furnace to obtain iron-water containing V …

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  Oxidation decomposition of chromite ore in molten …

  200774 · Based on all the previous work, the kinetics of the reaction and the effects of reaction temperature, weight ratio of KOH-to-chromite ore, and chromite particle size on chromium extraction during the decomposition process of a Vietnamese chromite ore in lower amount of molten potassium hydroxide have been investigated.

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  A cleaner method for preparation of chromium oxide from chromite ore

  202221 · Unfortunately, the formation of a molten state between the chromate ore particles at 1200 °C roasting temperature reduces the mass transfer rate of the oxygen (Yan et al., 2021), resulting in the low chromium extraction efficiency (approximate 85%) of this process for chromium and the larger energy consumption (Matern et al., 2020).

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  A cleaner method for preparation of chromium oxide from chromite

  201711 · Furthermore, the extraction process of chromium from leachate was investigated. Results demonstrated that iron, magnesium and aluminum could be effectively removed via oxalic acid treatment and subsequent pH adjustment, with chromium oxide as the final product.

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  Commercial Extraction Technology and Process Waste …

  Download Citation | On Jan 9, 2001, Grant Darrie published Commercial Extraction Technology and Process Waste Disposal in the Manufacture of Chromium chemicals From Ore | Find, read and cite all ...

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