胶结剂和粒度配比对型煤吸附与渗透性的影响

苏士龙; 李丽兵; 郭晓阳; 穆永亮

胶结剂和粒度配比对型煤吸附与渗透性的影响

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出版历程
- 发布日期: 2020-12-19

Effects of Cementing Agent and Particle Size Distribution on Adsorption and Permeability of Briquette

摘要

摘要: 针对瓦斯抽采物理模拟实验模型较大,无法采用大尺寸原煤进行实验的问题,对型煤的配制进行了研究。为了使型煤与原煤在瓦斯吸附和渗透率方面尽可能相近,研究了腐殖酸钠、羧甲基纤维素、钠基膨润土、聚醋酸乙烯乳液和煤焦油作为胶结剂对型煤吸附性和渗透率的影响;在考虑煤粉制作成本和工作量的基础上,根据Horsfield填充理论、致密堆积经验和Fuller致密堆积曲线,设计了5种不同的煤粉粒度配比方案,并研究了不同方案对型煤渗透的影响。结果表明:综合考虑吸附性和渗透率,应选用腐殖酸钠作为胶结剂;煤粉粒度配比对型煤渗透率有显著的影响,为减少煤粉制作的成本和工作量,应根据实验需要选择合适的煤粉粒径配比方案。
- 瓦斯抽采 /
- 物理模拟 /
- 型煤 /
- 胶结剂 /
- 粒度配比
Abstract: In view of the problem that the physical simulation model of gas extraction is too large to use large size raw coal for experiment, the preparation of briquette is studied. In order to make briquette and raw coal as close as possible in gas adsorption and permeability, the effects of sodium humate, carboxymethyl cellulose, sodium bentonite, polyvinyl acetate emulsion and coal tar as cementing agent on briquette adsorption and permeability are studied. Based on the consideration of pulverized coal production cost and workload, five different pulverized coal particle size distribution schemes are designed according to Horsfield filling theory, dense packing experience, and Fuller dense packing curve, and the influence of different schemes on briquette permeability is studied. The results show that: sodium humate should be used as cementing agent for comprehensive consideration of adsorbability and permeability; the particle size distribution of pulverized coal has a significant effect on the permeability of briquettes. In order to reduce the cost and workload of pulverized coal production, an appropriate pulverized coal particle size distribution scheme should be selected according to the experimental needs.
- gas extraction /
- physical simulation /
- coal briquette /
- cementing agent /
- particle size distribution

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参考文献(13)

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