100 t半钢钢包复吹脱磷工艺研究

摘要

通过水模拟实验，对100 t半钢钢包流动特性及冲击凹坑变化规律进行了研究，并根据结果进行工业试验，确定了半钢钢包的操作工艺。水模研究表明：当氧枪枪位600 mm、侧吹角度43°、顶吹流量3000(标准)m3/h及底吹流量100 L/min时，缩短了混匀时间，对熔池搅拌效果最好，以此确定工业试验方案。工业试验结果表明在半钢钢包复吹脱磷工艺下，脱磷渣化渣效果好，泡沫化程度高，渣中的FeO含量适中，炉渣具有很强的脱磷能力，脱磷效果好，脱磷率达到65%；半钢包内脱碳及脱磷同时进行，且脱碳量与脱磷量平均比例为2.85。%The process of combined-blowing dephosphorization for 100t semi-steel ladle furnace was studied with water model, and determined the operation technology of semi-steel ladle furnace according to the results of industrial test. The water model studies show that in order to shorten the mixing time and achieve the best effect of stirring, the optimum industrial test scheme is: lance height of 600 mm, side-blowing angle 43° , top blowing rate of 3000 m3/h and bottom blowing rate of 100 L/min. Industrial test results show that dephosphorization slag had a good performance in slag melting and high degree of foaming under the process of combined-blowing dephosphorization, the slag had moderate content of FeO and a well dephosphorization rate which could reach to 65%; decarburization and dephosphorization occurred simultaneously, and the average proportion of decarburization quantity and dephosphorization quantity was 2.85.