Produce practice of cleanliness control for IF steel during steel making process
XIE Jian-fu1， ZHAO Zhi-min2
1. 210 t Converter Plant，LY Steel Co.， Ltd.， Loudi 417009， Hunan， China 2. New Metallurgy Hi-tech Group Co.， Ltd.， China Iron and Steel Research Institute Group， Beijing 100081， China
Abstract：By optimizing converter bottom blowing， slag control， top slag modification technology， shortening processing cycle of RH refining， strictly controlling oxygen blowing during RH refining process， stabilizing oxygen content at decarburization endpoint， improving hit rate of Al adding， and ensuring the sedation time from RH vacuum break to casting being longer than 20 min which promising sufficient time for inclusions to float， the ratio that the total oxygen is below 2.5×10-5 in tundish molten steel is larger than 90%， the IF steel inclusions dropped from 1.41% in the year of 2011 down to 0.15% at present， and aluminum consumption dropped from1.86 kg/t in 2011 down to current 1.05 kg/t. The cleanliness of molten steel has been further improved.
谢建府，赵志民. IF钢炼钢过程洁净度控制生产实践[J]. 中国钢铁期刊网, 2016, 35(1): 44-47.
XIE Jian-fu， ZHAO Zhi-min. Produce practice of cleanliness control for IF steel during steel making process. Chinese Journal of Iron and Steel, 2016, 35(1): 44-47.
2016, Vol. 35 
