Study on Preparation and Properties of Polyvinyl Alcohol Oxygen-insulating Foam Material to Prevent the Coal Spontaneous Combustion

摘要：

In order to develop a new material to prevent the spontaneous combustion of coal, the modifiers, coagulant agents and foaming agents were used to modify the polyvinyl alcohol (PVA) which is an excellent oxygen-insulating material. Then the oxygen-insulating characteristics and the stability of the PVA foam material were investigated. The results show that the 3＃ foaming agent performs well at 0. 04％ (wt％), when the liquid precipitation half-life reaches up to 395 seconds in the half-life experiment. And when 1％ (wt％) modifier A is added, the foam presents a good state. The optimum formulation of foam material (wt％) is 94. 81％ water, 4％ PVA, 1％ modifier A, 0.15％ coagulant agent B and 0.04％ foaming agent. Simulated coal pile storage conditions, the oxygen-insulating characteristics and the stability of the PVA foam material have been investigated for 40 days. The oxygen concentration in coal pile could be decreased from 21％ to 5％ . The rate of coal oxidation and self-heating is weakened. After 40 days, the PVA foam material remains a good condition, nearly as well as before the experiment. So the PVA oxygen-insulating foam material can completely meet the requirements to prevent the spontaneous combustion of coal, it will have a good prospect.

关键词： spontaneous combustion of coal polyvinyl alcohol oxygen-insulating foam material

作者: MENG Mian-liang ZHANG Jing LIU Ya-fei ZHANG Zhong-cai WU Guo-guang CHU Rui-zhi WANG Zhi-hua

作者单位: Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining & Technology),Mini School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 22100

会议类型: 国际会议

会议名称: The 2nd International Conference on Mine Safety and Environment Protection(第二届采矿、安全与环境保护国际会议)

会议地点: 西安

会议语种:英文

页码: 110-114

在线出版日期: 2011-10-10（万方平台首次上网日期，不代表论文的发表时间）