Research and application of blast furnace’s low[w(MgO)]slag in Ansteel
LIU Jie1,ZHAO Dong-ming2,LI Jian-jun2,ZHOU Ming-shun1,ZHANG Hui1,XU Li-bing1
(1. Iron and Steel Research Institute, Angang Group, Anshan 114009, Liaoning, China 2. Ironmaking Plant, Ansteel Company Limited, Anshan 114021, Liaoning, China)
Abstract:In order to improve technical and economic indexes of blast furnace, the metallurgical properties of low [w(MgO)] slag were studied and evaluated systematically by laboratorial and industrial test in Ansteel. The results show that under the low Al2O3 load in blast furnace, the[w(MgO)]in slag is 4%-7%,and the melting temperature of all the slag is less than 1 350 ℃. When the temperature of slag is 1 500 ℃, the viscosity of the slag can satisfy the need of blast furnace in theory with[w(MgO)]over 3%. The best basicity of slag is about 1.245. Under the production condition in industry, the[w(MgO)]of slag is controlled in 4.5%-5.0%, and the viscosity of slag is about 0.16-0.20 Pa·s. The desulfurization capacity of the slag may not fall down when[w(MgO)]in slag decreases by optimizing basicity of slag. The production cost from BF operation decreases obviously and 17 kg/t(Fe) of the slag ratio is almost reduced by adopting new technology. So, it helps to implement green sustainable development.
刘 杰,赵东明,李建军,周明顺,张 辉,徐礼兵. 鞍钢高炉低镁渣冶炼技术研究与应用[J]. , 2018, 53(3): 22-26.
LIU Jie,ZHAO Dong-ming,LI Jian-jun,ZHOU Ming-shun,ZHANG Hui,XU Li-bing. Research and application of blast furnace’s low[w(MgO)]slag in Ansteel. Iron and Steel, 2018, 53(3): 22-26.
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