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采用CaC2-CaF2渣系对涟钢含砷较低铁水进行了一系列碳管炉和感应炉脱砷实验研究.研究表明,较高的铁水温度和良好的熔池搅拌有利于获得更好的脱砷效果,而铁水中的硫会对CaC2脱砷产生较大的不利影响.在本实验条件下,CaC2脱砷为固液反应,其限制性环节为砷通过铁水一侧的边界层向CaC2颗粒表面的扩散.同时感应炉实验结果表明,铁水中砷含量随反应时间的增加呈现一直降低的趋势,且采用60%CaC2+40%CaF2渣进行脱砷处理,反应时间15~20min时,砷含量最低可降至0.019%,即最大脱砷率为34.5%.
A series of carbon removal furnace and induction furnace arsenic removal experiments were carried out using the CaC2-CaF2 slag system for the lower arsenic-containing hot metal in Lianyuan Iron and Steel Co. The results show that the higher hot metal temperature and the good bath mixing help to get better off Arsenic effect, while the sulfur in molten iron will have a greater adverse effect on the arsenic removal of CaC 2. Under this experimental condition, the arsenic removal from CaC2 is a solid-liquid reaction, the limiting part of which is that the arsenic passes through the molten iron side boundary layer to CaC2 particles The results of induction furnace showed that the content of arsenic in molten iron decreased with the increase of reaction time, and the arsenic removal was carried out with 60% CaC2 + 40% CaF2 slag. When the reaction time was 15-20 min, the arsenic content The minimum can be reduced to 0.019%, that is, the maximum removal of arsenic was 34.5%.