From which ore does Chromium come?
Chromium countries producing the rest of about 18% of the world production. The two main products of chromium ore refining are ferrochromium and metallic chromium. For those products the ore smelter process differs considerably. For the production of ferrochromium, the chromite ore (FeCrO) is reduced in large scale in electric arc furnace or in smaller smelters with either aluminium or silicon in an aluminothermic reaction. For the production of pure chromium, the iron must be separated from the chromium in a two step roasting and leaching process. The chromite ore is heated with a mixture of calcium carbonate and sodium carbonate
Chromium rapidly throughout the region. In 1794, Louis Nicolas Vauquelin received samples of crocoite ore. He produced chromium trioxide (CrO) by mixing crocoite with hydrochloric acid. In 1797, Vauquelin discovered that he could isolate metallic chromium by heating the oxide in a charcoal oven, for which he is credited as the one who truly discovered the element. Vauquelin was also able to detect traces of chromium in precious gemstones, such as ruby or emerald. During the 19th century, chromium was primarily used not only as a component of paints, but in tanning salts as well. For quite some time, the crocoite