马钢120t顶底复吹转炉底吹工艺优化  

Optimization practice of bottom blowing technology of 120t BOF of Masteel

作　　者：牛金印[1] 解文中 王勇[1] 吴发达[1] 宋健 戴雨翔 NIU Jinyin;XIE Wenzhong;WANG Yong;WU Fada;SONG Jian;DAI Yuxiang(Ma’anshan Iron and Steel Co.,Ltd.,Ma’anshan 243011,Anhui,China;Metallurgical Department of Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]马鞍山钢铁股份有限公司,安徽马鞍山243011 [2]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《江西冶金》2021年第5期43-47,共5页Jiangxi Metallurgy

摘　　要：马钢第一钢轧总厂通过对120 t转炉底吹工艺不断优化与改进,将供气强度逐步提高到0.09 m3/(t·min),瞬间高强度达0.15 m3/(t·min),保证了底吹的效果,促进终点碳氧反应,终点碳氧积从0.0040逐步降低至0.0025左右;降低了转炉冶炼渣中带铁,渣中TFe含量平均值为17.01%;Mn合金收得率明显高于2#和3#转炉,平均值为95.19%。脱磷率变化不明显,平均值为77.11%,脱磷效果满足要求,并未出现回磷情况,通过转炉底吹工艺的优化,降低转炉冶炼的成本,减少了钢液的过氧化。Through continuous optimization and improvement of the bottom blowing process of the 120 tons converter at Masteel one steel rolling,the gas blowing intensity was gradually increased to 0.09 m3/(t·min),and maximum intensity effectively reached 0.15 m3/(t·min).The high intensity bottom blowing can promote the reaction of carbon and oxygen at end-point,and the content of carbon and oxygen gradually reduce from 0.0040 to about 0.0025.The average TFe content of the slag is 17.01%.The average yield of Mn alloy is 95.19%which is significantly higher than that of other two converter.The dephosphorization rate did not change significantly,with an average of 77.11%.The dephosphorization effect met with the requirements.The cost of converter smelting and the peroxidation of liquid steel are reduced.

关 键 词：顶底复吹 碳氧积 洁净度 

分 类 号：TF713.1[冶金工程—钢铁冶金]