Study on preparation and flame retardancy mechanism of MgAl-LDHs coal spontaneous combustion flame retardants
Wang Yun 1, Huang Jun 2, Yang Yujia 2, Tan Wenjing 2, Qi Yu 2, Li Jiangwei 2
1. Shanxi Coal distribution Group Nanhe coal industry Corporation Ltd., Jincheng 048000, China; 2. Sichuan University of Science and Engineering, School of Chemical Engineering, Zigong 643000, China
A material similar to hydrotalcite was successfully prepared by co-precipitation method, and Mg-Al hydrotalcite flame retardants modified with different zinc contents were further prepared, and their flame retardancy was evaluated. The results show that the flame retardancy of Mg-Al hydrotalcite (MgAl-LDHs) is not affected by the content of zinc. Spontaneous combustion experiment showed that the temperature of exothermic reaction was increased from 146.2 to 193.6 ℃ after the addition of MgAl-LDHs. The changes of functional groups of the materials during the reaction were analyzed by infrared spectroscopy. The oxidation of organic groups on the surface of coal was obviously prevented by the addition of MgAl-LDHs, indicating that the flame retardant has a strong flame retardant effect on coal. The technique studied can be used for temporary fire suppression.
王 云1，黄 骏2，杨钰佳2，谭文静2，漆 宇2，李江伟2. MgAl-LDHs煤自燃阻燃剂的制备及阻燃机理研究[J]. 煤炭与化工, 2025, 48(6): 146-151.
Wang Yun 1, Huang Jun 2, Yang Yujia 2, Tan Wenjing 2, Qi Yu 2, Li Jiangwei 2. Study on preparation and flame retardancy mechanism of MgAl-LDHs coal spontaneous combustion flame retardants. CCI, 2025, 48(6): 146-151.
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