文献类型：期刊文献

英文题名：Reaction, crystallization and element migration in coal slag melt during isothermal molten process

作者：Shen, Zhongjie[1,2];Hua, Xin[4,5];Liang, Qinfeng[1,2,3];Xu, JianLiang[1,2];Han, Dong[1,2];Liu, Haifeng[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, POB 272, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Beijing, Peoples R China;[4]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2017

卷号：191

起止页码：221

外文期刊名：FUEL

收录：;EI(收录号：20165003107787);WOS:【SCI-EXPANDED(收录号:WOS:000390432000023)】；

基金：This study was supported by the National Natural Science Foundation of China (U1402272), the Foundation of Shanghai Science and Technology Committee (14dz1200100), the National Natural Science Foundation of China (21376082), and the Foundation of State Key Laboratory of Coal Conversion (Grant No. J16-17-301).

语种：英文

外文关键词：Coal slag; Crystallization; Element migration; Isothermal molten process

摘要：Crystallization behavior of coal slag influences the slag flow and rheology properties in the slagging gasifier. Crystallization behavior of coal slag during isothermal molten process was observed and analyzed on the in situ experiment study. Complex aluminosilicates reaction led crystal to separate out in molten slag, mainly including the hexahedral crystal and acicular crystal, which varied with slag molten temperatures. The growth of crystal size first increased and then remained stable on molten slag surface with increasing isothermal time. The distribution and migration of coal slag elements on slag surface and inside crystal were also detected by time of flight secondary ion mass spectrometry (ToF-SIMS). Al, Ca and Si homogeneously distributed on the crystal and amorphous phase, due to the high content of element in coal slag. K mainly enriched on the crystal surface and amorphous phase while Na diffused and migrated onto the crystal surface. Mg doped into the interior of crystal, and the distribution of Fe varied with crystal type. (C) 2016 Elsevier Ltd. All rights reserved.