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How is chromite processed?
When chromite and lime are melted in an open electric-arc furnace and then contacted with ferrochrome silicon, a low-carbon (0.05 percent) ferrochromium can be obtained. In an alternate process, high-carbon ferrochromium is oxidized and then blended with additional high-carbon ferrochromium.
How does chromite ore form?
Chromite is used as a refractory in the production of steel, copper, glass and cement. Chromite occurs as a primary accessory mineral in basic and ultrabasic igneous rocks. Economic deposits form by crystallisation of chromite from a cooling magma, resulting in large stratiform deposits or smaller pod-like deposits.
What type of ore deposit is chrome mined from?
Chromium can be found in many minerals, but the only economically significant chromium-bearing mineral is chromite. Chromite has been mined from four different deposit types: stratiform chromite, podiform chromite, placer chromite, and laterite deposits.
Which of the following is the most successful method for chrome ore beneficiation?
Experience indicates that chrome ores are concentrated to best advantage by gravity methods. Since recoveries are generally very poor in the fine sizes, the gravity flowsheet must be designed to remove the chrome as soon as liberated by crushing and grinding.
Is chromite a good conductor of electricity?
FUEL CELLS – SOLID OXIDE FUEL CELLS | Cell Interconnection For interconnect applications, chromite ceramics demonstrate certain advantages including excellent high-temperature stability, good CTE matching to ceramic cell components, and a satisfactory electronical conductivity.
What is the difference between chrome and chromite?
As nouns the difference between chromite and chrome is that chromite is (mineral) a dark brown mineral species with the formula fecr2o4 while chrome is chromium, when used to plate other metals.
Is chromite ore magnetic?
Conclusions. Chrome spinel and gangue of Kimpersarski chromite ores has a low and scarcely distinguishable magnetic susceptibility which does not alter after heating at temperatures from 400° to 1300°C.
How is chromite found in nature?
Chromite is found as orthocumulate lenses 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.
How can you tell chrome ore?
Properties of Chromite Hand specimen identification of chromite requires a consideration of: color, specific gravity, luster, and a characteristic brown streak. The most important clue to identifying chromite is its association with ultrabasic igneous rocks and metamorphic rocks such as serpentinite.
Where is chromite found?
Chromite is a cumulate mineral which is found in ultramafic portions of layered mafic intrusions or in serpentines and other metamorphic rocks derived from the alteration of ultrabasic rocks.