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Roles of impurities on sintering structure and thermal strength of CaO-containing carbon pellet and the CaO sintering kinetic analysis
Gong, Xuzhong1,2; Wang, Zhishuai1; Wang, Zhi1; Cao, Jianwei1; Zhang, Shu1,3
2018-08-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume336Pages:92-101
Abstract

CaO containing carbon pellet (CCCP) for calcium carbide production was proposed in this work. The occurrence of impurities in both pulverized char and carbide slag is normally inevitable. This study is to examine the effects of the inorganic oxides on the microstructure and thermal strength of CCCP. Three different CCCPs of Ca(OH)(2) + raw char (CRC), carbide slag + raw char (CSRC) and Ca(OH)(2) + demineralized char with various impurities were prepared for the purpose of comparison. The results showed that the order of thermal strength of three kinds of CCCPs was as follows: Ca(OH)(2) + raw char (CRC) > carbide slag + raw char (CSRC) > Ca(OH)(2) + demineralized char (CDC). Four kinds of oxides (i.e. SiO2, Al2O3, Fe2O3 and MgO) as impurities could all possibly react with CaO to form low-melting eutectic matters to different extents, thus resulting in the decrease in the stability of CaO pellet. The presence of CaF2 in the demineralized char has caused over-sintered CaO grains and reduced the thermal strength of CDC. Meantime, the isothermal and non-isothermal experiments have revealed that the CaO grain sintering process could be well expressed by the model of "porous body sintering". (C) 2018 Elsevier B.V. All rights reserved.

KeywordImpurity Sintering Cao Pellet Microstructure Kinetic Model
DOI10.1016/j.powtec.2018.05.053
Language英语
WOS KeywordCarbide Slag ; Co2 Capture ; Calcium Carbide ; Cac2 Production ; Glass-ceramics ; Diffusion ; Powders ; System ; State ; Microstructure
Funding ProjectNatural Science Foundation of China[U1610101] ; Natural Science Foundation of China[51422405]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNatural Science Foundation of China
WOS IDWOS:000441491300009
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/25635
Collection中国科学院过程工程研究所
Corresponding AuthorGong, Xuzhong; Zhang, Shu
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Gong, Xuzhong,Wang, Zhishuai,Wang, Zhi,et al. Roles of impurities on sintering structure and thermal strength of CaO-containing carbon pellet and the CaO sintering kinetic analysis[J]. POWDER TECHNOLOGY,2018,336:92-101.
APA Gong, Xuzhong,Wang, Zhishuai,Wang, Zhi,Cao, Jianwei,&Zhang, Shu.(2018).Roles of impurities on sintering structure and thermal strength of CaO-containing carbon pellet and the CaO sintering kinetic analysis.POWDER TECHNOLOGY,336,92-101.
MLA Gong, Xuzhong,et al."Roles of impurities on sintering structure and thermal strength of CaO-containing carbon pellet and the CaO sintering kinetic analysis".POWDER TECHNOLOGY 336(2018):92-101.
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