Industrial Experiment on Desulphurization in RH Process by Using CaO+Al2O3 Based Fluxes with Low Fluoride
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摘要: 采用低氟型CaO+Al2O3复合基熔剂替代传统CaO-CaF2系脱硫剂,利用RH投入法进行钢液深脱硫工业试验。20个试验炉次的结果表明,RH平均脱硫率ηS可达到53.44%,脱硫后钢液中[S]≤24×10-6。分析了钢包顶渣的改性处理以及RH脱硫终渣组成对RH脱硫的影响。在此基础上,确定了RH脱硫剂的优化组成为:CaO+BaO (60%~65%)-Al2O3(20%~25%)-MgO (5%~7%)-CaF2(<5%)。Abstract: The industrial experiments on deep desulphurization by using (CaO+Al2O3) complex based fluxes instead of conventional CaO-CaF2 fluxes were carried out through flux addition in RH process.The results show that the average De-S rate of 53.44% has been achieved and the sulphur content in molten steel after RH refining is cut down to less than 24×10-6.The influence of modification treatment of the ladle top slag and final slag composition at the end of RH treatment on De-S is analyzed.The optimum composition of De-S agent is determined to be CaO+BaO (60%~65%) -Al2O3 (20%~25%) -MgO (5%~7%) -CaF2 (<5%).
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Key words:
- RH /
- modification treatment of ladle top slag /
- desulphurizing agent /
- CaO+Al2O3
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