Effect of Al2O3 Content in Slag on Blast Furnace Permeability and Drainage of Tapping

摘要：

　　Permeability and drainage of tapping are affected by slag fluidity in blast furnace operations.Increasing Al2O3 content in the slag tend to cause troubles in operation such as excess accumulation of molten slag in the furnace hearth and increase of pressure drop at the lower part of the furnace.In this study,in order to clarify the effect of the fluidity of the high Al2O3 slag on blast furnace operations.,high Al2O3 slag (20 %) test operations of the experimental blast furnace have been carried out.Investigation results of the test operations are as follows.1) Permeability of the cohesive zone is improved by increasing MgO and decreasing CaO/SiO2 of iron-ore at high Al2O3 iron-ore.2) Permeability of the dripping zone is improved by decreasing CaO/SiO2 of slag at high Al2O3 slag operation of the blast furnace.3) MgO in slag improves the hearth drainage rate at high Al2O3 slag operation.

关键词： experimental blast furnace slag Al2O3 viscosity drainage dripping permeability

作者: Kohei Sunahara Kaoru Nakano Masahiko Hoshi Yutaka Ujisawa Takanobu Inada

作者单位: Corporate Research & Development Laboratories.Sumitomo Metal Industries,Ltd.16-1 Sunayama Kamisu-cit Environment control section Wakayama steel works Sumitomo Metal Industries,Ltd.1850 Minato Wakayama-

会议类型: 国际会议

会议名称: Asia Steel International conference 2012(第五届亚洲钢铁大会)

会议地点: 北京

会议语种:英文

页码: 1-6

在线出版日期: 2012-09-23（万方平台首次上网日期，不代表论文的发表时间）