含铌钢水使用Al-Ca合金还原脱磷的试验研究
孙勇，徐掌印，魏延
（内蒙古科技大学,内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,省部共建国家重点实验室培养基地,内蒙古 包头 014010）
关键词：还原脱磷；含铌钢水；铝钙合金
中图分类号：TF704.4文献标识码：A
摘要：在20Kg真空感应电炉内用铝钙合金对含铌钢水进行了还原脱磷试验，脱磷温度为1823K，充入氩气保护，炉内压力66kPa，采用插入法加入脱磷剂，研究了脱磷剂加入量对脱磷率和钢水成分的变化的影响。试验结果表明：可使含铌钢水中的磷含量降低到0.022%，脱磷率为79.4%，硫降低到14×10-6，脱磷过程中铌含量不变。
Study on reductive dephosphorization of hot moltensteel containing Nb by addition of Al-Ca alloy
SUN Yong,XU Zhang-yin,WEI Yan
(InnerMongolia Key Laboratory for Utilization of Bayan Obo Multi-Metallic Resources,StateKey Laboratory,Inner Mongolia University of Science and Technology,Baotou014010,Inner Mongolia,China)
Keywords:reducing dephosphorization,niobium-bearinghot metal,Al-Ca alloy
Abstract:At thetemperature of 1 823K, the test of reductive dephosphorizationwas carried out on the hot molten steel containing Nb with Al-Ca alloy in a 20 kg vacuuminduction furnace ,whichwas filled with Ar to keep a furnace pressure of 66 kPa. Inserting method was adoptedto add the dephosphorization agent into the molten steel. The influence of theadding amount of dephosphorization agent on the dephosphorization rate and the compositionof molten steel was investigated . The test results show that in the moltensteel containing Nb, phosphorus content can be reduced to 0.022%,dephosphorization rate is 79.4%, and the sulphur content can be reduced to14×10-6; Nb content remains the same during the dephosphorizationprocess.