铝土矿尾矿烧结合成莫来石反应热力学计算与试验验证  

Sintering Reactionof Bauxite Tailings:Thermodynamics Analysis and Optimization Experiment

作　　者：姚文贵[1,2] 刘贺 马鸿文[1,2] 董成[1] YAO Wen-gui;LIU-He;MA Hong-wen;DONG Cheng(School of Materials Science and Technology,China University of Geosciences,Beijing 100083,China;Blue Sky Technology Corporation,Beijing 100083,China)

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083 [2]昊青薪材(北京)技术有限公司,北京100083

出　　处：《中国非金属矿工业导刊》2021年第1期60-64,共5页China Non-Metallic Minerals industry

基　　金：中央高校基本科研业务费“非水溶性钾矿资源化利用”项目(编号:2562014017)。

摘　　要：在综合分析铝土尾矿物相组成基础上,基于多相平衡反应热力学原理,分析评价直接高温烧结莫来石的反应过程。结果显示,在1100℃下,硬水铝石、高岭石等物相之间即可反应;1600℃下,尾矿烧结过程需消耗标煤约214.7 kg/t。烧结试验结果表明,在1100℃下烧结,铝土尾矿即可反应生成莫来石,并出现中间产物刚玉、方石英与少量赤铁矿;优化烧结温度为1600℃,最终产物的物相组成为:莫来石89.8%,铁板钛矿7.3%,硅酸钙2.3%,与计算结果相一致,其可作为生产硅莫砖原料使用。Based on the comprehensive analysis of the modal composition of bauxite tailings mineral phases and the principles of thermodynamic inmultiple phase,the reaction process of sintering into mullite at high temperature was analyzed.The results show that,diaspore,kaolinite and other phases could react at 1100℃.The sintering process consumed about 214.7kg of standard coal at 1600℃.The sintering experiment results show that,bauxite tailings could react to mullite at 1100℃,buttheintermediate products of corundum,cristobalite and minor hematite were sintered.Increasedtheoptimizedsintering temperature to 1600℃,the composition of final sintered product was mullite 89.8%,iron brookite 7.3%and calcium silicate 2.2%,which was consistented with thermodynamic analysis results.Thesintered product couldbeusedas raw material for producing GuiMo brick.

关 键 词：铝土矿 热力学 莫来石 高温烧结 烧结能耗 

分 类 号：TD926.4[矿业工程—选矿]