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Chromium is mined as chromite ore. Either as minerals with iron or magnesium. Chromite can be found mostly in South Africa, while Kazakhstan, India, Russia, and Turkey are also sizeable producers.

Chromite deposits are mined by both underground and surface techniques. After excavation, the minerals are smelted in a furnace. Finely divided ores do not smelt efficiently, so a number of processes are used to counteract. Fines can be blended with fluxes and coke (the principal source of carbon) and then preheated before being charged into an electric smelting furnace.

After smelting the ore is refined at 2,080° C (3,775° F) temperatures with100 kilopascals pressure in a pressure chamber.

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12y ago

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