(1. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China;
2.Technology Center, Shanghai Meishan Iron and Steel Limited Corporation, Nanjing 210039, Jiangsu， China;
3. Department of Production and Safety, Anyang Iron and Steel Group Co., Ltd., Anyang 455000, Henan, China)
Abstract： In order to obtain theoretical fundamentals on w(MgO)/w(Al2O3) control for blast furnace (BF) slag and ironmaking operation, the proper w(MgO)/w(Al2O3) in BF slag was investigated. Firstly, the necessity of w(MgO) in BF slag was discussed. Under the modern BF smelting operations, with the increasing of the w(Al2O3) in the slag, w(MgO) in the slag is necessary to ensure good metallurgical properties of the slag. The w(MgO)/w(Al2O3) in slag should be sectionally controlled according to w(Al2O3) in slag. In the case of w(Al2O3)<14%, the proper w(MgO)should be added according to the operation requirement. In the case of w(Al2O3)=15%17%, the proper w(MgO)/w(Al2O3) should be controlled at 0.400.50. For this case, the hearth temperature should be paid attention. In the case of w(Al2O3)>18%, the proper w(MgO)/w(Al2O3) should be controlled at 0.450.55. Based on theoretical analysis and experiments, pilotscale tests were carried out. In the pilot tests, the w(MgO)/w(Al2O3) decreased from 0.51 to 0.47, the coke rate decreased from 363.39 to 357.82 kg/t, the fuel rate decreased from 495.23 to 494.18 kg/t, and better technical and economic indices were obtained. These proved the reasonability and applicability of sectional control on w(MgO)/w(Al2O3) in BF slag.
姜鑫，沈峰满，韩宏松，龙防，郑海燕，高强健. 高炉渣适宜镁铝比分段管控的分析与应用[J]. 钢铁, 2019, 54(10): 12-16.
JIANG Xin1,SHEN Fengman1,HAN Hongsong1,2,LONG Fang1,3,ZHENG Haiyan1,GAO Qiangjian1. Analysis and application of sectional control of #br#
w(MgO)/w(Al2O3) in blast furnace slag. Iron and Steel, 2019, 54(10): 12-16.
