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    Other important uses include alloy steel, heating elements, pigments, leather processing, catalysts, and refractories. Of the chromite ore imported into the USA, the metallurgical industry consumed about 59 pct, the chemical industry consumed 21 pct, and the refractory industry consumed 20 pct.

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    Metallurgical & Materials Engineering Yudong Xue1,2, Shili Zheng 1*, Hao Du1,2, Shaona Wang 1, Yi Zhang and Wei Jin 1National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

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    Nov 19, 2004· In addition, aluminum in chromite ore can be extracted and recovered in the green process as aluminum hydroxide [Al(OH) 3]. Thus, the comprehensive use of all valuable elements (Cr–Al–Mg–Fe) in chromite ore and the zero emission of chromium‐containing toxic waste are achieved in the green process.

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    Aug 01, 2006· Green metallurgical processing of chromite In the new process, the oxidation of chromite ore is carried out in sub-molten potassium hydroxide at 300 °C. Compared with the traditional roasting process in a rotary kiln at 1200 °C, the oxidation and mass transfer are greatly intensified in the new process.

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  • Chromite - Wikipedia

    Chromite is found as orthocumulate lenses of chromitite in peridotite from the Earth's mantle.It also occurs in layered ultramafic intrusive rocks. In addition, it is found in metamorphic rocks such as some serpentinites. Ore deposits of chromite form as early magmatic differentiates. It is commonly associated with olivine, magnetite, serpentine, and corundum.

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    A new green metallurgical process for chromite ore has been proposed and developed to solve the serious environmental problem in the traditional production process of chromate. In the new process, the oxidation of chromite ore is carried out in sub-molten potassium hydroxide at 300 °C.

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    Chromite today is mined particularly to make stainless steel through the production of ferrochrome (FeCr), which is an iron-chromium alloy. Chromite grains are commonly found in large mafic igneous intrusions such as the Bushveld in South Africa and Travancore in India.

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  • Chromite (Cr2FeO4) | CrFeO4 - PubChem

    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 banned in several countries, its legacy still exists at numerous contaminated sites. For instance, New Jersey alone has over 2 million tons of waste COPR.

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    Green metallurgical processing of chromite - ScienceDirect. A new green metallurgical process for chromite ore has been proposed and developed to solve the serious environmental problem in the traditional production process of chromate. In the new process, the oxidation of chromite ore is carried out in sub-molten potassium hydroxide at 300 °C.

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    Integrating the proprietary green metallurgical process from chromite ore to potassium chromate of this laboratory, more than 99 wt % Cr(VI) could be conversed to Cr(III) compounds and about 99 wt % KOH could be recycled to use. The whole green process, ranging from chromite ore to chromic oxide green pigment, eventually not only provided the ...

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    Apr 16, 2004· Hirokazu Sugiyama and Masahiko Hirao, Development of process design methodology based on life cycle assessment, Process Systems Engineering 2003, 8th International Symposium on Process Systems Engineering, 10.1016/S1570-7946(03)80614-4, (624-629), (2003).

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