While many minerals contain chromium, chromite (FeCr 2O4) is the only
commercial ore mineral. Chromite has several industrial end uses, primarily
based on its Cr: Fe content. High chromium ores (defined by having high Cr: Fe
ratios) are used for producing ferro-chromium for metallurgical applications
such as stainless steel (the most important application by volume (85%) and
special uses (superalloys, special steels, plating). High iron chromitites are
being used for the production of low quality ferro chromium, foundry sands,
chromium salts (used in the leather tanning industry, as a pigment and in
chromium plating) and refractory purposes (production of magnesite-chromite and
chromite-magnesite bricks). South Africa, Kazakhstan and Turkey are the
worlds largest producers of chromite ore.
There are no economical substitutes for chromite ore in the production of
ferrochromium (i.e. stainless steel), chromium chemicals, or chromite
refractories at present. Currently, chromium free substitutes either compromise
product quality and/or increase costs.