Coal India Limited, together with its subsidiaries, produces and sells coal worldwide. It offers coking coal primarily for use in steel making and metallurgical industries, and for hard coke manufacturing; and semi coking coal that is used as blend-able coal in steel making, merchant coke manufacturing, and other metallurgical industries. The company also provides non-coking coal for use as thermal grade coal for power generation, as well as for cement, fertilizer, glass, ceramic, paper, chemical, and brick manufacturing, and other heating purposes. In addition, it offers beneficiated and washed non-coking coal for use in power generation; beneficiated non-coking coal, which is used in cement, sponge iron, and other industrial plants; and middling products for use in power generation, domestic fuel plants, brick manufacturing units, cement plants, industrial plants, etc. Further, the company provides rejects for use in fluidized bed combustion boilers for power generation, road repairs, briquette making, land filling, etc.; CIL/LTC coke that is used in furnaces and kilns of industrial units, as well as for use as domestic fuel by halwais, hotels, etc.; and coal/coke fines that are used in industrial furnaces, and for domestic purposes. Additionally, it offers tar/heavy oil/light oil/soft pitches, which are used in furnaces and boilers of industrial plants, as well as power houses, oil, dye, pharmaceutical industries, etc. The company was formerly known as Coal Mines Authority Limited and changed its name to Coal India Limited in November 1975. The company was incorporated in 1973 and is headquartered in Kolkata, India.