文献类型：期刊文章

作　　者：蒋周青[1,2] 杨静[1] 马鸿文[1] 王乐[1,2] 马玺[1,2]

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：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(2652014017) supported by the Fundamental Research Funds for the Central Universities,China

年　　份：2015

卷　　号：25

期　　号：6

起止页码：2065-2072

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EBSCO、EI、IC、INSPEC、JST、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：The reaction behaviours of A1203 and SiO2 in high alumina coal fly ash under various alkali hydrothermal conditions were studied. The means of XRD, XRF, FTIR and SEM were used to measure the mineral phase and morphology of the solid samples obtained by different alkali hydrothermal treatments as well as the leaching ratio of SiO2 to A1203 in alkali solution. The results showed that with the increase of the hydrothermal treating temperature from 75 to 160 ~C, phillipsite-Na, zeolite A, zeolite P, and hydroxysodalite were produced sequentially while the mullite and corundum phase still remained. Zeolite P was massively formed at low-alkali concentration and the hydroxysodalite was predominantly obtained at high-alkali concentration. By the dissolution of aluminosilicate glass and the formation of zeolites together, the leaching efficiency of SiO2 can reach 42.13% with the mass ratio of A1203/SIO2 up to 2.19：1.

关 键 词：high alumina coal fly ash  A1203 SIO2 alkali hydrothermal treatment  reaction behaviour  

分 类 号：TQ133.1] TQ127.2