文献类型：期刊文献

中文题名：Alumina Recovery from Kaolin with Mineral Impurities

英文题名：Alumina recovery from kaolin with mineral impurities

作者：Si Peng[1];Qiao Xiuchen[1];Yu Jianguo[2]

机构：[1]E China Univ Sci & Technol, Sch Resource & Environm Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：27

期号：6

起止页码：1139

中文期刊名：Journal of Wuhan University of Technology(Materials Science)

外文期刊名：JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION

收录：CSTPCD;;EI(收录号：20131516182717);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000312341600029)】；

基金：Funded by the National High-tech R&D Program of China ("863" Program) (SQ2007AA06Z129028), the Shanghai Pujiang Program (PJ200700339), the Science and Technology Commission of Shanghai Municipality (10dz12004900), and the Innovation Program of Shanghai Municipal Education Commision(11CXY25)

语种：英文

中文关键词：kaolin; alumina; calcination; milling; acid extraction

外文关键词：kaolin; alumina; calcination; milling; acid extraction

摘要：The alumina recovery from low grade kaolin （K-JS） treated through thermal and mechanical methods was investigated. High grade kaolin （K-SX） was used as comparison. The optimum calcination temperatures for K-JS and K-SX were both 600 ℃, which resulted in 89.34wt% of alumina extraction from K-JS and 83.37wt% from K-SX. With the increase in calcination temperature, the chemical reactivity of calcined K-JS and K-SX to acid decreased. Mechanical treatment was much more effective in increasing the alumina extraction from activated kaolin. Around 99wt% of alumina was extracted from K-JS ground for 10 hours and 95wt% of alumina was extracted from K-SX ground for 20 hours. The IR results showed that the substitute of A1 for Si occurred in calcined K-SX, however, the impurities in K-JS decreased this substitute. More alumina could be extracted from low grade kaolin than that from high grade kaolin under identical thermal or mechanical conditions.
The alumina recovery from low grade kaolin (K-JS) treated through thermal and mechanical methods was investigated. High grade kaolin (K-SX) was used as comparison. The optimum calcination temperatures for K-JS and K-SX were both 600 A degrees C, which resulted in 89.34wt% of alumina extraction from K-JS and 83.37wt% from K-SX. With the increase in calcination temperature, the chemical reactivity of calcined K-JS and K-SX to acid decreased. Mechanical treatment was much more effective in increasing the alumina extraction from activated kaolin. Around 99wt% of alumina was extracted from K-JS ground for 10 hours and 95wt% of alumina was extracted from K-SX ground for 20 hours. The IR results showed that the substitute of Al for Si occurred in calcined K-SX, however, the impurities in K-JS decreased this substitute. More alumina could be extracted from low grade kaolin than that from high grade kaolin under identical thermal or mechanical conditions.