防治煤炭自燃的多相凝胶泡沫制备实验研究

Experimental studies on preparation of multi-phase foamed gel for preventing spontaneous combustion of coal

为更有效地防治煤炭自燃,在三相泡沫的基础上提出多相凝胶泡沫防灭火新技术。多相凝胶泡沫是粉煤灰浆液、发泡剂、稠化剂、交联剂和气体通过物理机械搅拌形成的复合体系,集凝胶和三相泡沫防灭火性能于一体来防治煤炭自燃。实验研究发泡剂质量分数、稠化聚合物复配比例和质量分数、水灰质量比对泡沫性能的影响。还分析了溶液pH以及固体颗粒对多相凝胶泡沫性能的影响。研究结果表明:当发泡剂质量分数为4‰,稠化聚合物质量分数为6‰且稠化剂和交联剂质量比为1:1,水灰质量比为5:1时,制得的多相凝胶泡沫性能最佳。

In order to prevent the spontaneous combustion of coal efficaciously, a new compound material of multi-phase foamed gel, which is based on three-phase foam, which is composed of foaming agent, thickener, fly ash and nitrogen and formed by physical and mechanical stirrings, was proposed. It makes use of the all-around capability of gel and three-phase foam to prevent mine fire. The effects of the mass fraction of foaming agent and slurry, the quantitative ratio of polymers and content on foam properties were studied. In addition, the effects of solution pH and solid particle on the properties of multi-phase foamed gel were also studied. The results show that the properties of multi-phase foamed gel are the best when the mass fraction of foaming agent, polymers and slurry are 4%0, 6%o（the mass ratio is 1：1） and 16.66%（water cement mass ratio is 5：1）.