热闷钢渣粉的理化特性研究

Study on Physicochemical Properties of Hot Disintegration Steel Slag Powder

采用机械研磨的方式对热闷钢渣进行处理,研究不同研磨时间下热闷钢渣粉的粒度分布、化学成分、矿物成分、孔结构和热稳定性。结果表明:当研磨时间大于90 min,热闷钢渣粉的粒径大小与粒径分布均改善,但是其改善效果有限。粒径减小与粒径分布均匀的热闷钢渣粉有利于热闷钢渣中Ca的富集。当研磨时间为90~110 min时,热闷钢渣粉中Ca2Si O4衍射峰强度和Ca3Si O5衍射峰强度最大。研磨方式在提高热闷钢渣粉细度的同时对钢渣具有的多孔结构进行了破坏。Ca(OH)2与Ca CO3是热闷钢渣粉中可热分解失重的物质,随热闷钢渣粉的粒径减小与粒径分布均匀,可热分解失重的物质含量增加。

Hot disintegration steel slag was processed by mechanical grinding. The particle size distribution, chemical compositions, mineral composition, pore structure and thermal stability of hot disintegration steel slag powder at different grinding times were studied. The results show that when the grinding time is more than 90 min, although the particle size and particle size distribution of hot disintegration steel slag powder are both improved, the improvement effect is limited. The enrichment of Ca content in hot disintegration steel slag is facilitated by hot disintegration steel slag powder with decreasing particle size and uniform particle size distribution. When the grinding time is 90-110 min, Ca2 SiO4 diffraction peak intensity and Ca3 SiO5 diffraction peak intensity are the maximum in hot disintegration steel slag powder. The grinding method not only improves the fineness of hot disintegration steel slag powder but also damages the porous structure of steel slag. Ca（OH）2 and CaCO3 is material of thermally decomposed weightlessness in hot disintegration steel slag powder, with particle size reduction and particle size uniform distribution of hot disintegration steel slag powder, the content of material of thermally decomposed weightlessness can be increased.