Chromium processing
Chromium processing
Most of the world's production of chromite (95%) is used in the metallurgical industry in the form of ferrochromium alloys. The alloys are produced by high temperature reduction (smelting) of chromite. They are essentially alloys of iron and chromium with much lesser amounts of carbon and silicon, the amounts depending upon the grade or type of alloy, and impurities such as sulphur, phosphorous and titanium. The conversion of chromite to ferrochromium alloys is dominated by electric submerged arc furnace smelting with carbonaceous reductants, predominantly coke, and fluxes to form the correct slag composition. The electric current is 3-phase Alternating Current (AC) and the furnaces have three equally spaced consumable graphite electrodes in a cylindrical, refractory-lined container with a bottom tap-hole.
Chromium Ore Concentrate
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Chromium Ore Flotation
A more advanced attempt to overcome the problem of ore fines was the introduction of DC arc, or plasma, furnace technology. The DC arc furnace uses a single, central hollow graphite electrode as the cathode, with an electrically conducting refractory furnace hearth as the anode. The furnace operates with an open bath, so there is no problem with overburden, and the chromite fines, together with coal and fluxes, are fed directly into the bath through the hollow electrode. The furnace has a closed top. Some of the advantages of DC arc furnace operation are: use of fine ores without agglomeration, use of cheaper reductants and greater choice of reductants, higher chromium ore flotation recoveries, deliberate changes in the charge composition are reflected rapidly in the slag or metal, and closed top operation allows furnace off-gas energy to be used. .
Crushing equipment in mining industry
In chrome ore beneficiation plant, chromite is crushed into small pieces, then go through further processing. Jaw crusher for chrome ore: Jaw crusher is used for coarse crushing chrome ore into small pieces. Jaw Crusher has the features of great crushing ratio, uniform sizes of promance. It can be used to crush material its compressive resistance not more than 320 MPa. It is widely used in various industries, such as mining, smelting, road and railway construction and chemical industry etc.
Mobile Jaw crusher for chrome ore beneficiation: Mobile Jaw crusher is the chrome ore crushing machine used in chrome processing plant. Other mobile crusher is also widely used. Jc Jaw crusher gets to world advanced level, which is designed and made through absorbing world advanced crushing technology. It is widely used in metallurgical, aggregate, building material industries. It is suitable for crushing varies of hard and above mid hard ores and rocks.