摘要
为了探明MgO掺杂对高炉渣熔融调质钢渣(混合渣)物相组成与结构的影响,采用X射线衍射仪和SEM-EDS扫描电镜对高温调质后混合渣物相组成及形貌进行了分析。结果表明,掺杂MgO能有效抑制MgFe_(2)O_(4)相和非胶凝性Ca_(2)Al_(2)SiO_(7)物相生成、促进MgFeAlO_(4)物相生成,提高混合渣熔点。MgO掺杂量2%的高温调质混合渣截面呈层状结构,内层MgFeAlO_(4)物相占比增加,孔洞均匀且细小;中间具有层状结构的MgFe_(2)O_(4)尖晶石包裹在MgFeAlO_(4)物相周围;外层Ca_(2)Al_(2)SiO_(7)物相孔洞均匀,致密度适中;此结构的混合渣是较好的重金属离子过滤材料。
The phase composition and morphology of a molten mixture of steel slag and furnace slag prepared at a high temperature was analyzed by X-ray diffraction and SEM-EDS scanning electron microscope to investigate the effect of MgO doping.The results show that MgO doping can effectively inhibit the formation of MgFe_(2)O_(4)phase and non-gel Ca_(2)Al_(2)SiO_(7)phase,and promote the formation of MgFeAlO_(4)phase,thus increasing the melting point of the mixed slag.It is found that the mixed slag after doping 2%MgO presents a layered structure on its cross section.The inner layer has an increased proportion of MgFeAlO_(4)phase,with uniform and fine pores;and the MgFeAlO_(4)phase is wrapped by MgFe_(2)O_(4)spinel with layered structure in the middle part;and the outer layer has Ca_(2)Al_(2)SiO_(7)phase with uniform pores and moderate density.The mixed slag with such kind of structure is suitable to be used as the filter material for removing heavy metal ions.
作者
郝帅
罗果萍
陈银胜
柴轶凡
安胜利
宋巍
HAO Shuai;LUO Guoping;CHEN Yinsheng;CHAI Yifan;AN Shengli;SONG Wei(School of Materials and Metallurgy(School of Rare Earth),Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China)
出处
《矿冶工程》
CAS
北大核心
2023年第1期95-98,104,共5页
Mining and Metallurgical Engineering
基金
国家重点研发计划(2020YFC1909105)
国家自然科学基金(51664045)
内蒙古自治区科技重大专项(2021ZD0016)
内蒙古自治区高等学校碳达峰碳中和研究专项(STZX202231)。
关键词
钢渣
高炉渣
MGO
高炉渣熔融调质钢渣
混合渣
高温调质
过滤材料
steel slag
blast furnace slag
MgO
mixture of blast furnace slag and steel slag molten at high temperature
mixed slag
preparation at high temperature
filter material
