煤矿采空区地下水的化学脱硫技术

Application of Chemical Desulfering Technology to Groundwater of Mined-out Area in Coal Mine

河南省煤矿系我国大水矿区,采空区地下水水患严重.通过对河南省煤矿酸性老窑水水化学环境、水化学特征及水化学成因的综合分析,提出了用化学脱硫技术处理矿井酸性水的原理及合成混凝剂的使用方法,并导出了相应的工艺参数.即合成混凝剂中氢氧化钙与铁铝酸四钙的重量比为1∶1 3～1∶1 5;酸性老窑水水温每增加10℃生石灰投放量可适当减少50mg/L;pH值每增加一个单位,生石灰投放量相应减少25mg/L.实践证明,用上述物化方法和工艺参数处理矿井水是可行的.

The coal mines of Henan province are surely abundant water mining areas in China The problem of the waste groundwater is much serious tooThrough synthetical analyses of the water chemical characteristics,water chemical environment and the water chemical origin of acid groundwater,this paper proposes the principle of chemical sulfer erasing technique which can process mine acid water and the compound coagulant applying method Some corresponding technology parameters are discussedThe weight ratio of Ca(OH)2 and 4CaOAl2O3Fe2O3 is about 1∶13～1∶15Quick lime quantity put in must diminish 50 mg/L when the temperature is increased by 10℃ and diminish 25 mg/L when pH value is increased by one unit The processing of mine water with the method of chemical sulfer erasing technique is practicable.