CaC2-CaF2渣系对铁水脱砷的研究

采用CaC₂-CaF₂渣系作为脱砷剂,在实验室范围内进行了铁水还原脱砷的研究。
实验是在钼丝炉内,Ar气氛下,石墨坩埚中进行的。研究了温度、渣成份、渣量、初砷含量和铁水含si量等因素对脱神效率的影响。
通过热力学分析说明了在钢铁溶液中,只能还原脱砷而不能氧化脱砷;用CaO-CaF₂、CaC₂-CaF₂渣系对铁水同时脱硫脱磷脱砷是不可能的。

Dearsenification of Hot Metal with CaC2-CaF2 Slag

Dearsenification of hot metal was studied on the bench scale with CaC₂-CaF₂ slag. Experiments were carried out in the Molybdenum-wound furnace under Ar atmosphere in the graphite crucible. Effects of temperature,composition and amount of slag,the initial As content and the Si content of hot metal on the degree of dearsenification were investigated.
Thermodynamic analysis has shown that dearsenification in iron and steel melts is only accomplished under reducing conditions. It has been ascertained that it is impossible to carry out desulfurization,dephosphorization and dearsenifieation of hot metal with CaC₂-CaF₂ or CaO-CaF₂ slag simultaneously.