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《材料导报》期刊社  2017, Vol. 31 Issue (24): 1-5    https://doi.org/10.11896/j.issn.1005-023X.2017.024.001
  第一届先进胶凝材料研究与应用学术会议 |
预分解磷石膏制备贝利特-硫铝酸盐水泥
梁 娇,楚婉怡,黄永波,李凤玲,刘 娜,钱觉时
重庆大学材料科学与工程学院,重庆 400045
Utilizing Decomposed Phosphogypsum for the Preparation of Belite-Calcium Sulphoaluminate Cement
LIANG Jiao, CHU Wanyi, HUANG Yongbo, LI Fengling, LIU Na, QIAN Jueshi
College of Materials Science and Engineering, Chongqing University, Chongqing 400045
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摘要 研究磷石膏在低温还原-高温氧化气氛下的分解特性,并将分解后的磷石膏作为钙源代替石灰石制备贝利特-硫铝酸盐水泥。结果表明:在碳硫比(C/S)为2,CO2-950 ℃-1 h/空气-1 200 ℃-1 h的分段煅烧条件下,磷石膏分解率可达87.69%,且SO2在900~1 200 ℃内集中释放。将分解率为87.69%的磷石膏代替部分石灰石烧制贝利特-硫铝酸盐水泥熟料,其主要矿相有C4A3、C2S和C4AF,及少量C2AS,水泥净浆3 d抗压强度为41.4 MPa。每生产1 t贝利特-硫铝酸盐水泥熟料可消纳约0.98 t磷石膏,减少石灰石用量近50%。
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梁 娇
楚婉怡
黄永波
李凤玲
刘 娜
钱觉时
关键词:  预分解磷石膏  分解特性  分段煅烧  贝利特-硫铝酸盐水泥    
Abstract: The decomposition characteristics of phosphogypsum (PG) in reductive atmosphere at low temperature and oxidizing atmosphere at high temperature were investigated. The decomposed phosphogypsum as a calcium source in place of limestone was used to prepare belite-calcium sulphoaluminate cement. The results showed that the decomposition rate of PG with the ratio of C/S=2 could reach 87.69% with the calcining process of CO2-950 ℃-1 h/air-1 200 ℃-1 h. SO2 could be controlled to concentratedly release in the temperature range of 900-1 200 ℃.The decomposed PG with the decomposition rate of 87.69% was used to prepare BCSA cement. C2AS was detected in the cement clinker except for C4A3, C2S and C4AF. The compressive strength of cement paste at 3 d could reach 41.4 MPa. About 0.98 t phosphogypsum is consumed for 1 t BCSA cement clinker, reducing the amount of limestone nearly 50%.
Key words:  decomposed phosphogypsum    decomposition characteristics    piecewise calcination    belite-calcium sulphoaluminate cement
               出版日期:  2017-12-25      发布日期:  2018-05-08
ZTFLH:  TU52  
基金资助: 国家自然科学基金(U1202275);重庆大学研究生科技创新项目(CYB15013)
通讯作者:  钱觉时:男,1962年生,博士,教授,主要从事胶凝材料、混凝土和固体废弃物资源化研究 E-mail:qianjueshi@163.com   
作者简介:  梁娇:女,1994年生,硕士研究生, 主要从事固体废弃物资源化利用、新型建筑材料研究 E-mail:44738191@qq.com
引用本文:    
梁 娇,楚婉怡,黄永波,李凤玲,刘 娜,钱觉时. 预分解磷石膏制备贝利特-硫铝酸盐水泥[J]. 《材料导报》期刊社, 2017, 31(24): 1-5.
LIANG Jiao, CHU Wanyi, HUANG Yongbo, LI Fengling, LIU Na, QIAN Jueshi. Utilizing Decomposed Phosphogypsum for the Preparation of Belite-Calcium Sulphoaluminate Cement. Materials Reports, 2017, 31(24): 1-5.
链接本文:  
http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.024.001  或          http://www.mater-rep.com/CN/Y2017/V31/I24/1
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