The prefix fero means iron, and the difference between chromium and ferrochrome is the iron contained in ferrochrome. The main use of chrome is in stainless steel. To produce chrome, the metal mineral chromite is placed in metal melting furnaces to make ferrochrome. Chromium iron alloy, which is obtained by removing oxygen from chromite, is a stainless iron alloy. A piece of stainless steel can replace ferrochrome as a source of chromium.
Stainless steel, having 12 to 36% chromium, occupies 80% of the global consumption of chromium. Chromium is used in the preparation of all kinds of alloys due to its resistance to corrosion, heat, wear, wear and oxidation. Ferrochrome increases hardness and density, as well as increases resistance to corrosion and rusting of steel. A variety of ferrochrome chromite with a low Cr:Fe ratio is used to produce low chromium, high carbon ferrochrome.
75% of steel with high formability and excellent anti-rust property available in the market have 16-25% chromium, more than 15% carbon and 7-20% nickel in their composition, which are used in chemical processes, oil refining, paper making and food processing. is used Another 20% of the market is ferritic stainless steel, which has 11-17% chromium (art structures, cookware, kitchen sinks, exhaust systems). Super ferritic alloys contain up to 25% chromium and are used in seawater cooling systems, acids, alkalis, double stainless steel, 26-22% chromium, chemical designs and pipes.
Type C alloy has 50-55% chromium, obtained from chromite with high iron, Cr:Fe ratio less than 1:8, type B has 56 to 64% chromium, Cr:Fe ratio less than 1:8, and type A has More than 64% of chromium is obtained from high-chromium chromite with a Cr:Fe ratio greater than 2.5. Recent advances in chromium extraction technology have had a significant impact on the production of chromium ferroalloys and stainless steels, the use of argon-adjacent decarburization (AOD) has resulted in ingots with lower chromium grades and lower Cr/Fe ratios. (about 1.5), which have more reserves and lower prices than higher-grade chromium, should be used in the production of ferrochrome used in steel industries, it should be noted that the consumption of kermit ore in Different industries in each country do not necessarily reflect the total chromium consumption in that country.