低品位锂辉石对铝矾土尾矿制备莫来石基复相陶瓷的影响  

Influence of Low Grade Spodumene on Preparation of Mulite-based Compound Ceramics with Bauxite Tailings

作　　者：杨帆 王淇 闵鑫[1] 房明浩[1] 黄朝晖[1] 刘艳改[1] 吴小文[1] 米瑞宇[1] 刘长淼[2] 刘玉林[2] 黄妃慧 YANG Fan;WANG Qi;MIN Xin;FANG Minghao;HUANG Zhaohui;LIU Yangai;WU Xiaowen;MI Ruiyu;LIU Changmiao;LIU Yulin;HUANG Feihui(School of Materials Science and Engineering,China University of Geosciences(Beijing),Beijing 100083,China;Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou 450063,China;Shandong Aofu Environmental Protection Technology Co.,Ltd.,Dezhou 251599,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]中国地质科学院郑州矿产综合利用研究所,河南郑州450063 [3]山东奥福环保科技股份有限公司,山东德州251599

出　　处：《金属矿山》2022年第9期244-250,共7页Metal Mine

基　　金：“十三五”国家重点研发计划项目(编号:2018YFC1901501)。

摘　　要：在铝矾土尾矿减量消纳利用制备陶瓷材料的基础上,探究低品位锂辉石的助熔作用对制备莫来石基复相陶瓷的影响。在配料—混料—干燥—成型—烧结的制备工艺过程中外加低品位锂辉石,探究外加剂含量(0%、2%、5%、10%)和烧结温度(850、900、950℃)对莫来石基复相陶瓷物相行为、显微形貌和力学性能的影响规律。结果表明,经低温烧结制得莫来石基复相陶瓷的主要物相为石英、莫来石、刚玉,提高烧结温度在热力学和动力学方面均有利于莫来石的形成;锂辉石的助熔作用可增加试样中的莫来石和刚玉等优质耐高温物相,在微观形貌上起到支撑骨架作用,有利于提高试样的力学性能;外加10%低品位锂辉石时,在950℃温度下保温2 h获得试样的常温抗压强度为47.0 MPa、体积密度为1.77 g/cm^(3)。On the basis of ceramic preparation with reusing of bauxite tailings,explore the influence of melting effect of low grade spodumene on the preparation of mulite-based compound ceramics.The effects of admixture content(0%,2%,5%,10%)and sintering temperature(850,900,950℃)on the phase behavior,microstructure and mechanical properties of mullite multiphase ceramics,which are prepared by batching-mixing-drying-forming-sintering were studied.The results show that the main phases of mullite multiphase ceramics prepared by low temperature sintering is quartz,mullite and corundum,increasing sintering temperature is beneficial to mullite formation in both thermodynamic and kinetic aspects.The melting effect of low garde spodumene can increase the high temperature resistant phases of mullite and corundum in the samples,and play a supporting role in the microstructure,which is beneficial to improve the mechanical properties of the samples.The test sample,with the admixture content of 10%and preparation at 950℃for 2 h,was appeared the compressive strength of 47.0 MPa and the volume density of 1.77 g/cm^(3).

关 键 词：固废利用 铝矾土尾矿 锂辉石 抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学]