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Blast Furnace Iron Desulfurizers |
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Calcium carbide is a powerful and effective chemical reducing agent. Nowhere is this more evident than in the field of metallurgy, where it is added to liquid iron and steel through subsurface pneumatic powder injection in order to remove sulfur impurities prior to the final steelmaking process.
In modern steelmaking operations, the need for lower sulfur steels demanded by modern continuous casting operations, and certain specialty applications have increased calcium carbide's appeal as a hot metal desulfurizer. The powdered carbide used for this application is manufactured by ball milling selected sizes of carbide to less than 140 US-mesh (<105 microns). The milled carbide can then be custom blended with a wide range of other powder additives, such as lime, limestone, and fluorspar to meet customer specified formulations. The milled carbide is treated with special additives to significantly improve flow characteristics. Because of their reactivity, calcium carbide powders are manufactured, mixed, loaded, and transported in either 20 ton pressure differential trailers or 100 ton railcars, under an inerting atmosphere of dry nitrogen. |