Introduction of low iron silicon calcium

Low iron silicon-calcium alloy , referred to as silicon-calcium alloy, belongs to the category of ferroalloy, its main components are silicon and calcium, but also contains different amounts of iron, aluminum, carbon, sulfur, and other impurities. Other impurities are specified according to different uses. In addition, other elements are added based on the silica-calcium alloy to form ternary or multivariate composite alloy. Such as Si - Ca - Al; Si - Ca - Mn; Si-Ca-Ba, used as steel metallurgy deoxidizer, desulfurizer, denitrification agent, and alloy agent.

Because calcium has a strong affinity with oxygen, sulfur, hydrogen, nitrogen, and carbon in molten steel, silica-calcium alloy is mainly used for deoxidation, degassing, and sulfur fixation in molten steel. The addition of calcium and silicon to molten steel produces a strong exothermic effect. Calcium changes into calcium vapor in molten steel, which can stir the molten steel and facilitate the floating of non-metallic inclusions. After deoxidization of silica-calcium alloy, large and easy-to-float non-metallic inclusions are produced, and the shape and properties of non-metallic inclusions are changed. Therefore, silica-calcium alloy is used to produce clean steel,  steel with low oxygen and sulfur content, and special performance steel with extremely low oxygen and sulfur content. Add the calcium silicon alloy can eliminate as final deoxidizer in aluminum steel in the ladle nozzle nodules, and continuous cast steel | ironmaking of tundish nozzle clogging and so on. In the out-of-furnace refining technology of steel, deoxidation and desulfurization are carried out with silicon-calcium powder or core wire, so that the content of oxygen and sulfur in steel is reduced to very low. It can also control the form of sulfide in steel and improve the utilization rate of calcium. In cast iron production, silicon-calcium alloy in addition to deoxidization and purification, but also play a role in inoculation, contribute to the formation of fine or spherical graphite; The distribution of graphite in gray cast iron is uniform and the tendency of white mouth is reduced. And can increase silicon, desulfurization, improve the quality of cast iron.