武钢第二炼钢厂于1976年从日本新日铁株式会社引进了KR铁水脱硫设施。按专利要求,从1979年投产以来,一直是采用CaC_2作为脱硫剂进行脱硫。但是,用CaC_2作为脱硫剂进行脱硫存在以下问题:一是CaC_2在加工、运输、贮存和使用过程中难以保证安全和使用性能。因为细微粒度(0.1～1mm)的CaC_3极易同水发生反应,生成乙炔(C_2H_2)气体易燃易爆,很易导致质量劣化失去脱硫效果,因此,必须采用氮气保护。这 Wuhan Iron and Steel No. 2 Steel Works introduced the KR hot metal desulfurization facilities from Japan’s Nippon Steel Corporation in 1976. According to the patent requirements, since 1979 put into production, has been the use of CaC_2 desulfurization agent for desulfurization. However, the desulfurization with CaC_2 has the following problems: First, it is difficult to ensure the safety and performance of CaC_2 in the process of processing, transportation, storage and use. Because fine particle size (0.1 ~ 1mm) CaC_3 easily react with water, generating acetylene (C_2H_2) gas flammable and explosive, it is easy to lead to deterioration of the quality of the loss of desulfurization effect, therefore, must be protected by nitrogen. This