用后镁碳砖基转炉终渣改质剂的配料优化  

Burdening optimization of wasted MgO-C brick-based converter final slag modifier

作　　者：郑万[1,2] 任金琴 温正勇 许威威[2] 冯学龙 郑永飞[2] 刘磊[2] 

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081

出　　处：《武汉科技大学学报》2015年第1期23-26,共4页Journal of Wuhan University of Science and Technology

基　　金：武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室开放基金资助项目(EMRU201201)

摘　　要：以用后镁碳砖为原料制备转炉冶炼终渣改质剂,分析不同粒度回收料的化学成分,研究改质剂配料组成选择以及物料配比对改质剂强度的影响,优化用后镁碳砖基改质剂的配料组成。结果表明,用后镁碳砖回收料粒度不同,其氧化镁及碳含量差别较大,以用后镁碳砖为原料制备改质剂时,粒度为〈0.1、0.1-0.6、0.6-1mm的镁碳砖细粉配比应为3∶4∶3,菱镁石粒度应为1-3mm;在用后镁碳砖及菱镁石的镁质原料组成下,改质剂的强度随水量的增加而增大、随黏结剂用量的增加而降低;优化后的用后镁碳砖基改质剂的配料组成为：60.2%的用后镁碳砖、25.7%的菱镁石、10%的石墨粉、0.1%的黏结剂以及10%的水。With wasted MgO-C bricks as the raw material,converter final slag modifier was developed.Chemical compositions of wasted magnesia-carbon bricks with different particle sizes were analyzed.In order to optimize the formulation of wasted MgO-C brick-based modifier,the selection of starting materials and its effect on the strength of slag modifier were studied.The results show that different sizes of recycled MgO-C brick material have different contents of magnesium oxide and carbon.When preparing the slag modifier with wasted MgO-C bricks,the mass ratio of its fine powder with particle size0.1mm,at 0.1-0.6 mm and at 0.6-1 mm should be 3∶4∶3and the grain size of magnesite should be 1-3mm.The strength of slag modifier increases with the increment of water content and decreases with increasing binder content.The optimized formula for the preparation of wasted MgO-C brick-based slag modifier is 60.2% of wasted magnesia-carbon bricks,25.7% of magnesite,10% of flake graphite,0.1% of binder and 10% of water,respectively.

关 键 词：转炉渣 改质剂 用后镁碳砖 配料组成 氧化镁 强度 

分 类 号：TF09[冶金工程—冶金物理化学]