新型矿用EMI降尘剂对煤尘的润湿特性研究
Research on wetting characteristics of new-type EMI on coal dust
金永飞 1刘仁飞 2郭军 1柴洋洋 3晏立 2张科峰2
作者信息
- 1. 西安科技大学 安全科学与工程学院,陕西 西安 710054;西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054
- 2. 西安科技大学 安全科学与工程学院,陕西 西安 710054
- 3. 山西平阳重工机械有限责任公司,山西 临汾 043003
- 折叠
摘要
随着矿井机械化开采程度的提高,煤尘产生量也随之增大.针对煤矿井下作业环境中的粉尘污染日益严重的问题,通过测定含不同质量分数绿色高效生物降尘剂(EMI)溶液的表面张力,并以不同粒径煤尘与EMI溶液的接触角、煤尘润湿速度、煤尘吸湿量及保水性为指标,研究了不同质量分数的EMI溶液对不同粒径煤尘的润湿效果.实验结果表明:随着溶液中EMI降尘剂的质量分数增大,煤尘的接触角逐渐减小,煤尘完全沉降所需时间逐渐下降,吸湿量逐渐增大,保水性逐渐增强,且失水后煤样的板结性较大.通过分析得出EMI润湿煤尘的作用机理:降低水的表面张力;增加溶液润湿性;减少水分流失;提高溶液的抗蒸发性.
Abstract
With the improvement of mechanized mining,the amount of coal dust produced also increases.In view of the increasingly serious problem of dust pollution in the underground working environment of coal mines,the surface tension of solution containing green high-efficiency biological dust suppressant(EMI)with different mass fractions was measured.The wetting effect of EMI solution with different mass fractions on coal dust with different particle sizes was studied using the indicators of contact angle,coal dust wetting rate,coal dust moisture absorption and water retention of coal dust with different particle sizes were taken as indicators.The experimental results show that as the mass fraction of EMI dust depressant in the solution increases,the contact angle of coal dust decreases gradually with the increase of mass fraction of EMI dust depressant in the solution,the time required for complete settlement of coal dust decreases gradually,the moisture absorption increases,the water retention gradually increases,and the hardening property of coal samples is larger after water loss.Through analysis,the mechanism of EMI wetting coal dust is obtained:reducing the surface tension of water;increasing the wettability of the solution;reducing the water loss,and improving the evaporation resistance of the solution.
关键词
煤尘防治/降尘剂/EMI溶液/润湿特性/表面张力/保水性/接触角Key words
coal dust control/dust depressant/EMI solution/wetting characteristics/surface tension/water retaining/contact angle引用本文复制引用
基金项目
国家自然科学基金(52174198)
国家自然科学基金青年基金(52004209)
陕西省秦创原"科学家+工程师"队伍建设项目(2022KXJ-166)
出版年
2024
NETL
NSTL
万方数据