高铁赤泥提铁尾渣制备硫铝酸盐水泥  

Preparation of sulphoaluminate cement from tailings of iron extraction from high iron red mud

作　　者：陈鑫[1] 吕国志[1] 王坤[1] 陈鹏[1] 陈杨[1] 张廷安[1] Chen Xin;Lv Guozhi;Wang Kun;Chen Peng;Chen Yang;Zhang Tingan(Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,沈阳110819

出　　处：《材料与冶金学报》2020年第4期234-239,共6页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(U1903129).

摘　　要：近几年中国大量进口几内亚高铁铝土矿,产生大量高碱的高铁赤泥,污染环境的同时又造成了金属资源的浪费.针对高铁赤泥目前面临的处理难题,研究以高铁赤泥还原提铁后的尾渣为原料制备硫铝酸盐水泥,从烧结温度、保温时间、冷却方式三方面考察硫铝酸盐水泥熟料的烧结情况.实验通过XRD检测观察水泥熟料中关键相3CaO·3Al 2O 3·CaSO 4和β-2CaO·SiO 2的结晶情况,结果显示在1350℃、保温时间1.0 h、空冷的条件下,3CaO·3Al 2O 3·CaSO 4和β-2CaO·SiO 2的结晶最充分.In recent years,China has imported a large amount of high-iron bauxite from Guinea,which produces a large amount of high-alkali and high-iron red mud,which pollutes the environment and also causes a waste of metal resources.For the current processing problems of high iron red mud.In this research,sulfoaluminate cement was prepared by the tailings after iron extraction from high iron red mud.This study investigates the sintering situation of sulphoaluminate cement clinker from three factors:sintering temperature,holding time and cooling method.The crystallization of the key phases 3CaO·3Al 2O 3·CaSO 4 andβ-2CaO·SiO 2 was observed by XRD analysis.The crystallization of 3CaO·3Al 2O 3·CaSO 4 andβ-2CaO·SiO 2 was the most sufficient at 1350℃,holding time 1.0 h and air cooling.

关 键 词：赤泥 还原 硫铝酸盐水泥 

分 类 号：TF09[冶金工程—冶金物理化学]