SiO2含量对CaO-SiO2-FeO-MgO体系钢渣固相改质的影响  

Effect of SiO2 content on solid-phase modification of CaO-SiO2-FeO-MgO steel slag

作　　者：蒋亮[1,2] 韩霄[1] 吴婷 马良富 李宁 陈宇红 韩凤兰[1] JIANG Liang;HAN Xiao;WU Ting;MA Liang-fu;LI Ning;CHEN Yu-hong;HAN Feng-lan(School of Material Science and Engineering,North Minzu University,Yinchuan 750021,China;China Building Material Academy,Key State Laboratory of Green Building Materials,Beijing 100024,China)

机构地区：[1]北方民族大学材料科学与工程学院,宁夏银川750021 [2]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100024

出　　处：《材料热处理学报》2018年第10期133-140,共8页Transactions of Materials and Heat Treatment

基　　金：宁夏科技支撑计划项目(亿吨级哈萨克斯坦铜冶炼渣的综合利用技术研究);2017年度北方民族大学中央高校基本科研业务费专项资金资助(2017KY01);“粉体材料与特种陶瓷”重点实验室2018年度项目(1804)

摘　　要：以转炉（BOF）钢渣作为研究对象,研究了SiO_2加入量变化对钢渣中改质产物形成的影响。实验结果表明：合成钢渣中SiO_2的成分变化会对最终产物相产生较为复杂的影响。SiO_2的含量增加对改质钢渣中镁铁尖晶石形成起积极作用,但对硅酸二钙形成起消极作用。SiO_2的含量增加还会导致合成钢渣粘度提高,不利于镁铁尖晶石晶粒持续生长。对于改质钢渣中SiO_2的最终加入量需要综合考虑其对镁铁尖晶石和硅酸二钙的影响作用。在本实验的研究范围内,样品S3（碱度=1.8）具有较好的综合改质结果。Taking BOF steel slag as the research object, the influence of SiO_2 addition on the formation of modification products in the steel slag was studied.The results show that SiO_2 addition in the synthetic steel slag has a complex effect on the final product phase. The increase of SiO_2 content brings a positive effect on the formation of magnesioferrite spinel in the modified steel slag, but generates a negative effect on the formation of dicalcium silicate. The increase of SiO_2 content also leads to the increase of viscosity of the synthetic steel slag, which is not conducive to the continuous growth of the magnesioferrite spinel grains. The effect of SiO_2 on the magnesioferrite spinel and dicalcium silicate should be considered comprehensively for confirming the final addition of SiO_2 in the modified steel slag. In this experiment, sample S3（alkalinity=1.8） has the optimal comprehensive upgrading results.

关 键 词：钢渣 镁铁尖晶石 SiO_2 改质 

分 类 号：X757[环境科学与工程—环境工程]