鞍钢转炉双渣深脱磷工艺研究与实践

 在100t顶吹、180t复吹及260t复吹转炉上研究了双渣法深脱磷规律。通过工业性试验，研究不同吹炼时期冶炼特点，分析吹炼过程需要控制的原料及工艺制度等关键措施，研究结果表明：控制倒炉温度、碱度、渣中w（(FeO)）及熔渣流动性等因素均是取得良好脱磷效果的重要保证。应用双渣法深脱磷生产试验取得了100t顶吹转炉出钢w（［P］）平均达到63×10-6，180t复吹转炉w（［P］）达到51×10-6，260t复吹转炉w（［P］）达到62×10-6的实绩。

Technical Study and Practice on Deep Dephosphorization With Double Slags in Converter in Ansteel

Research of deep dephosphorization with double slags in the 100t top blowing converter and 180t combined converter and 260t combined converter were carried on. Different characters during the total blowing time were studied through the industrial experiments. Some key measures of the raw materials and operating system during the blowing process were analyzed also. The results show that: the temperature of molten steel, bacisity, w（(FeO)） and fluidity of slag at turning down are the important guarantees to ensure dephosphrization effect. The average result of w（［P］） at tapping can reach 63×10-6 in 100t top blowing converter and 51×10-6 in 180t combined converter and 62×10-6 in 260t combined converter with double slags in industrial test.