Materials Reports  2020, Vol. 34 Issue (Z2): 308-314 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on the Technology of Preparing Magnesium Oxychloride Cement Material by Calcination Extraction of Lithium By-Product Based on Orthogonal Experiment and Response Surface Method |
| LIU Pan1,2,3, XIAO Xueying1,2, CHANG Chenggong1,2, A Danchun1,2,3, LI Ying1,2, DONG Jinmei1,2, ZHENG Weixin1,2, HUANG Qing1,2,3, DONG Fei1,2,3, LIU Xiuquan1,2,3, WEN Jing1,2
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1 Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lake, Chinese Academy of Sciences, Xining 810008, China
2 Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China
3 University of Chinese Academy of Science, Beijing 100049, China |
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Abstract In order to expand the source of active magnesium oxide for magnesium oxychloride cement materials, the optimum technological conditions for the preparation of magnesium oxychloride cement from the by-product of lithium extraction by calcination were studied by orthogonal test and response surface analysis. The effects of calcination temperature, molar ratio between MgO and MgCl2, and the baume degree of MgCl2 solution on the compressive strength of magnesium oxychloride cement at different ages were studied by using the three-factor and four-level ortho-gonal test, with the compressive strength as the evaluation index. The significance analysis results show that the calcination temperature and the baume degree of MgCl2 solution are important factors that affect the compressive strength of magnesium oxychloride cement materials at different ages, while the molar ratio between MgO and MgCl2 had no obvious effect on the compressive strength of magnesium oxychloride cement at different ages. Taking the 28 d compressive strength as an evaluation index, the best technological conditions for the preparation of magnesium oxychloride cement materials were as follows: calcination temperature 800 ℃, molar ratio 8.7 between MgO and MgCl2, baume degree of MgCl2 solution 28. The accuracy of the orthogonal test results is proved by response surface analysis and verification test. The response surface prediction model has certain guiding significance for optimizing the material preparation process and predicting the mechanical properties of materials.
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Published: 08 January 2021
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| Fund:This work was financially supported by the Major Project for the Transformation of Scientific and Technological Achievements of Qinghai Province (2019-GX-165);the Youth Innovation Promotion Association CAS (2018467, 2019423). |
| About author:: Pan Liu, graduate student of the Chinese Academy of Sciences. Mainly engaged in the comprehensive utilization of salt lake magnesium resources and the durability research of magnesium cementitious materials.Jing Wen, associate researcher and master tutor of Qinghai Salt Lake Research Institute, Chinese Academy of Sciences. He graduated from the Qinghai Salt Lake Research Institute of the Chinese Academy of Sciences in 2013 with a Ph.D. in inorganic chemistry. Worked in the same year, mainly engaged in research work on the comprehensive utilization of salt lake magnesium resources, basic theory of magnesium materials and concrete durability. A total of more than 20 papers such as SCI and EI were published, more than 50 invention patents were declared, and 17 were authorized. |
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| Cite this article: |
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LIU Pan,XIAO Xueying,CHANG Chenggong, et al. Study on the Technology of Preparing Magnesium Oxychloride Cement Material by Calcination Extraction of Lithium By-Product Based on Orthogonal Experiment and Response Surface Method[J]. Materials Reports,
2020, 34(Z2): 308-314.
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| URL: |
| http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ2/308 |
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