（1. Metallurgical Technology Institute, Central Iron and Steel Research Institute, Beijing 100081, China 2. Thermal Equipment and Material Department, New Metallurgy Hi- Tech Group Co., Ltd., Beijing 100081, China 3. National Engineering Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081, China）
Abstract：In order to improve the service life of multiple hole plug （MHP） and the metallurgical effect for combined blowing converter, the asymmetric alternating gas supplying technology for large flow capillary MHP was investigated. For the water model experiment, the gas flow ratio of the two branches was 3.3∶1 and alternated each other heat. The results illustrated that the corrosion rate of the MHP was proportional to the gas flow of each capillary when the bottom gas supply intensity was 0.2 nm3/(t·min). The quantity of capillary increased 1 time, and then the gas supply ability of MHP rised 1 time. The corrosion rate of MHP can be reduced by 50% and the life of MHP can be doubled through the application of the large flow capillary MHP with big size and asymmetric alternating gas supplying technology at bottom. The mixing time of the converter molten steel bath and the hot metal dephosphorization pretreatment bath can be reduced by 19.6% and 63%, respectively, by using the asymmetric alternating gas supplying technology, therefore the metallurgical effect of the converter were improved remarkably. The asymmetric alternating gas supplying technology of large flow capillary MHP can significantly improve the combined blowing furnace campaign and metallurgical effect compared with the method of pre- embedded MHP and replacing the MHP in combined blowing converter.
杨文远 李林 彭小艳 王明林 高飞 史晓强. 提高复吹转炉透气砖寿命和冶金效果的新技术[J]. 中国冶金, 2017, 27(12): 14-21.
YANG Wen- yuan,LI Lin,PENG Xiao- yan,WANG Ming- lin,GAO Fei,SHI Xiao- qiang. New technology for improving service life of multiple hole plug and metallurgical effect for combined blowing converter. China Metallurgy, 2017, 27(12): 14-21.
2017, Vol. 27 
