·The international market for chromite ore synthetic formula 2 O 3 the only commercially viable source of new chromium Cr units is predominantly driven by the global demand for ferrochrome FeCr Secondary FeCr markets comprise of the Cr chemicals abrasives refractories and foundry sand industries and account for a relatively small share
·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 and corrosion resistant metal that is widely used in various industrial applications due to its unique properties
·Table 2 and Fig 2 show that chromite particles are in the crystal form whose the monomer dissociation is % the remaining part of chromite particles are associated with other minerals Figure 3 shows that particle shapes are very angular after grinding Some chromite particles are wrapped by chlorite part of the chlorite exists along the edge of the
·Since chromite ore also contains iron alumina and gangue minerals including silicates reaction of alkali with these elements will yield new complexes which are likely to alter the chemical composition of the liquid phase Thermodynamic analysis of the possible reactions of sodium/potassium hydroxides with the different elements of the ore
The fusion of chromite ore F e C r 2 O 4 with N a 2 C O 3 in air gives a yellow solution upon addition of water Subsequent treatment with H 2 S O 4 produces an orange solution The yellow and orange colours respectively are due to the formation of N a 2 C r O 4 and N a 2 C r 2 O 7; C r 2 C O 3 3 and F e 2 S O 4 3; C r O H 3 and N a
What is Chromite 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 bearing rocks are altered by heat or weathering
·Ferrochromium alloys are principally prepared in a conventional open/semi closed submerged arc furnace SAF mainly fed with lumpy chromite ore b closed SAF fed with oxidized chromite ore sinter/pellets and lumpy chromite ore c closed SAF charged with pre reduced pellets of chromite ore which are usually produced by pre reduction of carbon
·Chromite ore processing residue COPR is a kind of hazardous industrial solid waste produced in the chromium salt industry that needs to be disposed of properly and safely
·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
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