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水泥技术, 2023, 1(3): 73-78    doi: 10.19698/j.cnki.1001-6171.20233073
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脱硫石膏引起水泥凝结时间异常的原因分析
华润水泥技术研发(广西)有限公司,广西  南宁  530409
Analysis of Abnormal Cement Setting Time Caused by Desulfurized Gypsum
China Resources Cement Technology R&D (Guangxi) Co., Ltd. , Nanning Guangxi 530409, China
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摘要 脱硫石膏是常用的水泥调凝剂,因使用脱硫石膏而引发的水泥凝结时间异常事故时有发生。通过采用XRD矿物分析、XRF元素分析、溶解特性分析、DSC-TG热特性分析等试验方法,对某企业使用脱硫石膏引发的水泥凝结时间异常原因进行了分析。分析结果显示,脱硫石膏中适量杂质离子的存在,对水泥的缓凝有一定改善作用;含有较多半水石膏的脱硫石膏,活性较高、溶解快、溶解度高,缓凝作用发挥快。水泥企业使用工业副产脱硫石膏前,应进行相关理化分析,优化脱硫石膏的掺加比例,稳定水泥质量。
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钟煜
曾荣
劳里林
关键词:  脱硫石膏  凝结时间异常  溶解度  缓凝时间    
Abstract: Desulfuration gypsum is a commonly used cement retarder, and accidents with abnormal cement setting time caused by the use of desulfuration gypsum often occur. By using experimental methods such as XRD, XRF, dissolution characteristic analysis, and DSC TG, the cause of abnormal cement setting time caused by the use of desulfurization gypsum in a certain enterprise was analyzed. The analysis results show that the presence of an appropriate amount of impurity ions in desulfuration gypsum has a certain improvement effect on the retarding effect of cement; desulfuration gypsum containing a large amount of hemihydrate gypsum has high activity, fast dissolution, high solubility, and fast retarder effect. Before using industrial by-product desulfurization gypsum in cement enterprises, relevant physical and chemical analysis should be conducted to optimize the addition ratio of desulfurization gypsum and stabilize cement quality.
Key words:  desulfuration gypsum    abnormal setting time    solubility    retarder time
收稿日期:  2022-08-25                出版日期:  2023-05-25      发布日期:  2023-05-26      整期出版日期:  2023-05-25
ZTFLH:  TQ172.462  
引用本文:    
钟煜, 曾荣, 劳里林. 脱硫石膏引起水泥凝结时间异常的原因分析[J]. 水泥技术, 2023, 1(3): 73-78.
ZHONG Yu, ZENG Rong, LAO Lilin. Analysis of Abnormal Cement Setting Time Caused by Desulfurized Gypsum. Cement Technology, 2023, 1(3): 73-78.
链接本文:  
http://www.cemteck.com/CN/10.19698/j.cnki.1001-6171.20233073  或          http://www.cemteck.com/CN/Y2023/V1/I3/73
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