摘要
分析了转炉冶炼过程中磷收入量和支出量、入炉辅料加入量、留渣操作以及冶炼终点温度和碳含量对深脱磷的影响。通过工艺因素分析,确定了脱磷的影响。试验结果表明：转炉中的磷主要来源于铁液,比例达到96%,其次是废钢和返矿;磷支出以炉渣支出为主,比例达到97.42%,转炉的脱磷率随渣量的增大而增大,按渣钢比控制在120～130kg/t左右,留渣操作可使前期渣更佳利于脱磷,提高脱磷率,冶炼终点出钢温度应控制在1 620～1 640℃,终点碳含量控制0.03%～0.05%,磷含量达到0.004%以下,可以实现极低磷钢的生产。
The effects of the volume of phosphorus incoming and expenses, the amount of accessories feed to the converter, the remaining slag operation, the end temperature of smelting and carbon content on dephosphorization in the process of converter smelting were analyzed, and the effects of dephosphorization were determined by the analysis of dephosphorization technology factors. The results show that the phosphorization in converter is derived from liquid iron primarily with the ratio of 96%, followed by steel scrap and return mine. The phosphorus expenses is major in slag expenses, the ratio achieves 97.42%. The rate of dephosphorization considerably grows with the increase of slag quantity in converter. The remaining slag operation can make early slag more conducive to dephosphorization to improve dephosphorization rate. The temperature of smelting steel end should control between 1 620-1 640 ℃, and the end carbon content controls between 0.03%-0.05%. Thus .phosphorus content can achieve lower than 0.004%.
出处
《铸造技术》
CAS
北大核心
2015年第4期980-984,共5页
Foundry Technology
关键词
转炉脱磷
磷收入
留渣操作
终点温度
dephosphorization in converter
phosphorus income
remaining slag operation
end temperature
