包钢高炉渣中特殊成分对钢渣自粉化行为的影响
Effect of Special Components in Blast Furnace Slag of Baotou Iron and Steel Company on Self-pulverization Behavior of Steel Slags
陈银胜 1罗果萍 1郝帅 1任杰 1安胜利 1柴轶凡1
作者信息
- 1. 内蒙古科技大学 材料与冶金学院,内蒙古 包头 014010
- 折叠
摘要
这是一篇冶金工程领域的文章.我国钢渣累计堆存量大,给资源和环境造成巨大压力.本文提出"应用熔融高炉渣与钢渣混合以实现钢渣自粉化"的新思路,就包钢高炉渣中特殊成分(CaF2和CeO2)对钢渣自粉化的影响机理进行系统研究.以分析纯CaO、SiO2、CaF2、CeO2为原料,按n(CaO)∶n(SiO2)=2∶1的配料制备了纯C2S试样,接着分别掺入不同质量分数的CaF2和CeO2,将试样在1 450 ℃恒温焙烧1 h后随炉冷却,探究CaF2和CeO2对C2S自粉化行为的影响规律.结果表明,将CaF2掺入C2S中,当CaF2含量低于2.5％时,对C2S的自粉化几乎没有影响,但在CaF2含量超过2.5％时,试样出现了不同程度的结块现象,影响了 C2S的自粉化,考虑到过量的CaF2会对环境产生影响,因此CaF2的掺入量应控制在2.5％以下;将CeO2掺入C2S中,当CeO2含量为0.25％时,C2S仍能完全自粉化,但CeO2含量超过0.5％时,C2S不再出现自粉化现象,因此CeO2含量必须低于0.25％,C2S自粉化效果较好.
Abstract
This is an article in the field of metallurgical engineering,which proposed a new idea of mixing molten blast furnace slag with steel slag to achieve self-pulverization of steel slag,and systematically studied the influence mechanism of special components of CaF2 and CeO2 in blast furnace slag of Baotou Iron and Steel Company on the self-pulverization of steel slags.Using analytically pure CaO,SiO2,CaF2 and CeO2 as starting materials,pure C2S specimens were prepared with n(CaO)∶n(SiO2)=2∶1,then different mass fractions of CaF2 and CeO2 were added,respectively.The effect of CaF2 and CeO2 on the self-pulverization behavior of C2S was investigated by calcining the specimen at 1 450 ℃ for 1 h and cooling with the furnace.The results showed when CaF2 was incorporated into C2S and the content of CaF2 was less than 2.5％,it had little effect on the self-pulverization of C2S.However,when the content of CaF2 was more than 2.5％,the specimen had different degrees of agglomeration,which affected the self-pulverization of C2S.Considering that excessive CaF2 would affect the environment,the content of CaF2 should be controlled below 2.5％.When CeO2 incorporated into C2S and the content was 0.25％,C2S could still be completely self-pulverized,but when the CeO2 content was more than 0.5％,C2S no longer self-pulverized.Therefore,the CeO2 content must be less than 0.25％,and the self-pulverization effect of C2S was relatively good.
关键词
冶金工程/炼钢渣/高炉渣/特殊成分/硅酸二钙/自粉化Key words
Metallurgical engineering/Steelmaking slag/Blast furnace slag/Special components/Dicalcium silicate/Self-pulverization引用本文复制引用
基金项目
国家重点研发计划项目(2020YFC1909100)
国家重点研发计划项目(2020YFC1909105)
出版年
2024
国家科技期刊平台
NSTL
万方数据