Dissolution properties of calcined gangue

查看全文 作　　者：Huajian [1]Li;Henghu [1]Sun;Xuchu [2]Tie;Xuejun [2]Xiao

机构地区：[1]Department of Material Science and Engineering, Tsinghua University, Beijing 100084, China;[2]Deportment of Resources, China University of Mining & Technology (Beijing), Beijing 100083, China

出　　处：《Journal of University of Science and Technology Beijing》索引2006年第13卷第6期,共7页

基　　金：This work was financially supported by the National Natural Science Foundation of China (No.50474002) and the Key Project of theMinistry of Education of China (No.104231) 摘　　要：To study the dissolution mechanism of gangue, dissolution characteristics of the gangue samples calcined at different temperatures in alkaline solutions and alkali metal silicate solutions with respect to Si and Al ions were analyzed by identical coupled plasma optical emission spectroscopy (ICP). The results show that the extent of dissolution of Al and Si varies with calcination temperature. It shows that the samples have a higher degree of dissolution in NaOH than in KOH medium. Si and Al appear to have synchro-dissolution behavior in alkaline solution, which means that Si and Al could dissolve from the mineral surface in certain linked forms. The result that a higher degree of dissolution exists in sodium silicate solution and a lower degree of dissolution exists in sodium-potassium silicate solution of Al is proved by the 29Si NMR spectra and the mean connectivity degree of these alkali metal silicate solutions. 关键词：煅烧脉石分解性等离子光发射光谱 NMR ICP

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Dissolution properties of calcined gangue

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