%A LIU Jie,ZHAO Dong-ming,LI Jian-jun,ZHOU Ming-shun,ZHANG Hui,XU Li-bing %T Research and application of blast furnace’s low[w(MgO)]slag in Ansteel %0 Journal Article %D 2018 %J Iron and Steel %R 10.13228/j.boyuan.issn0449-749x.20170323 %P 22-26 %V 53 %N 3 %U {http://www.chinamet.cn/Jweb_gt/CN/abstract/article_150293.shtml} %8 2018-03-15 %X 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.