梯级粉磨制备活性钢尾渣微粉实验研究  

Experiment on Preparation of Active Slag Tails Powder by Step Grinding Process

作　　者：时朝昆 杨志强 尹尤豪 赛音巴特尔 王金花 SHI Zhaokun;YANG Zhiqiang;YIN Youhao;Saynbaatar;WANG Jinhua(Technology Research Institute of Shougang Group Co.,Ltd.,Beijing 100043,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043

出　　处：《金属材料与冶金工程》2024年第1期50-54,共5页Metal Materials and Metallurgy Engineering

摘　　要：钢尾渣是钢铁行业最大宗的工业固体废弃物,也被视为可利用的资源。建材行业为实现钢尾渣大宗化资源利用提供了有利条件,但安定性和水化活性差的问题却备受诟病。应对之策是:钢尾渣微粉化可有效规避安定性问题,而水化活性差问题可通过梯级粉磨工艺解决。由于钢渣内部各种矿物的表面硬度差异明显,因此,采用梯级粉磨工艺能够使钢尾渣微粉中的硅酸盐相矿物含量提高,实现钢尾渣微粉水化活性的改善与稳定。研究结果显示:在收粉率为70%~80%、比表面积≥400 m^(2)/kg的钢尾渣微粉中,硅酸钙相矿物含量由48%提高到57%,其活性指数为《GB/T 20491—2006用于水泥和混凝土中的钢渣粉》一级且保持稳定,有利于钢尾渣微粉在建材领域的大宗化利用。Slag tails is the largest industrial solid waste in the steel industry,and it is also regarded as an available resource.Building materials industry provides favorable conditions for realizing bulk utilization of slag tails.However,the problem of poor stability and hydration activity has been criticized.The countermeasures are as follows:the micronization of slag tails can effectively avoid the problem of stability.The problem of poor hydration activity can be solved by the step grinding process.Because of the obvious difference in the surface hardness of various minerals in the slag,it is possible to enrich the silicate phase minerals in the micro-powder by the step grinding process,and to improve and stabilize the hydration activity of the slag micro-powder.The results showed that the content of calcium silicate phase mineral increased from 48%to 57%in the slag tails powder with 70%to80%powder yield and specific surface area≥400 m^(2)/kg,and its activity index was the first level of GB/T 20491—2006 Steel Slag Powder Used in Cement and Concrete and remained stable,which was beneficial to the mass utilization of slag tails powder in building materials field.

关 键 词：钢尾渣 粉磨 胶砂活性 

分 类 号：X757[环境科学与工程—环境工程]