钢渣氧化重构及其水化动力学研究  

Oxidation Modification of Steel Slag and Its Hydration Kinetics

作　　者：蒋亮[1,2] 韩霄[1] 吴长松 刘贵群 陈宇红 韩凤兰[1] 包亦望[2] JIANG Liang;HAN Xiao;WU Chang-song;LIU Gui-qun;CHEN Yu-hong;HAN Feng-lan;BAO Yi-wang(School of Material Science and Engineering,North Minzu University,Yinchuan 750021,China;Key State Laboratory of Green Building Materials,China Building Material Academy,Beijing 100024,China)

机构地区：[1]北方民族大学材料科学与工程学院,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：《硅酸盐通报》2018年第10期3091-3096,3107,共7页Bulletin of the Chinese Ceramic Society

基　　金：宁夏高等学校科学研究项目(NGY2018-142);宁夏科技支撑计划国际合作专项项目(NXIC-2013);2017年度北方民族大学中央高校基本科研业务费专项资金(2017KY01)

摘　　要：以宁夏钢铁集团转炉钢渣为研究对象,利用氧化重构工艺使转炉钢渣中无磁性富铁相向磁性镁铁尖晶石群发生转变。探索了高温重构工艺对重构钢渣中矿物相演变的影响规律,并对重构钢渣的水化动力学机理进行了研究。实验结果表明,加热温度对于重构钢渣中镁铁尖晶石群形成具有决定性作用,氧化重构温度越高,尖晶石群产量越多,且在重构温度为1300℃时镁铁尖晶石群产量达到最大值。重构温度的提高还对钢渣水化活性的改善具有有益作用。除1250℃重构钢渣之外,其余温度重构钢渣的水化活性相较于原钢渣都有了显著提升。经1350℃高温重构后,原钢渣的72 h水化累积放热由16. 07 J·g^(-1)提高为22. 39 J·g^(-1)。The oxidation process of steel slag was carried out,which was subjected to the steel slag of Ningxia Iron&Steel Group.This approach consisted of transforming the non-magnetic wustite into magnetic magnetite by oxidation.The influence of modified parameters on the minerals of steel slag was studied.The evolution law and hydration kinetics of modified slag were discussed.The results show that oxidizing temperature has significant influence on the formation of spinel.As the oxidizing temperature rising,the amount of spinel increases and reaches a max value at 1300℃.The hydration properties of modified slag increases as the oxidizing temperature rising.Except the slag oxidized at 1250℃,the modified slag exhibits better hydration properties than that of the raw slag.The 72 h cumulative heat of modified slag at 1350℃increases from 16.07 J·g-1 to 22.39 J·g-1,compared to that of the raw slag.

关 键 词：钢渣 水化 动力学 重构 

分 类 号：X756[环境科学与工程—环境工程]