Low Coke Rate Operation of Blast Furnace by Controlling Size of Coke Mized Into Ore Layer

摘要：

In Kobe Steel, the blast furnace operation with low coke rate by coal injection has been carried out in order to reduce coke consumption. The problem of the operation is the increase of furnace pressure drop. The lump coke plays an irreplaceable role on keeping gas permeability in furnace. The present paper focused on two separate roles of coke as a reducing agent and as a bed spacer, and found that controlling the size of mixed coke in ore layer enabled the nut coke to be mainly consumed to regenerate CO gas, while the lump coke to form less degraded permeable bed. As a result of application to Kakogawa No.3 blast furnace, the permeability in furnace was improved and the coke rate was reduced.

关键词： blast furnace low coke rate operation mized coke nut coke coke quality

作者: Muneyoshi Sawayama Kazuya Miyagawa Kentaro Nozawa Yoshiyuki Matsui Ko-ichiro Shibata

作者单位: R&D Lab., Kakogawa works, Kobe Steel, Kakogawa, Japan Headquarters, Kobe Steel,Kobe, Japan Iron making Dep., Kakogawa works, Kobe Steel, Kakogawa, Japan

会议类型: 国际会议

会议名称: The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)

会议地点: 上海

会议语种:英文

页码: 663-667

在线出版日期: 2009-10-20（万方平台首次上网日期，不代表论文的发表时间）