APAM-PAC对高含固率煤矸石粉悬液的高效絮凝沉降试验  

Efficient flocculation and sedimentation experiment of APAM-PAC on coal gangue powder suspension with high solid content

作　　者：丁维波 王锐 程磊 阮泽宇 徐金海 DING Weibo;WANG Rui;CHENG Lei;RUAN Zeyu;XU Jinhai(Shaanxi Coal Industry Company Limited of Caojiatan,Yulin 719000,China;China Coal Land Ecological Environment Technology Co.,Ltd,Beijing 100070,China;China University of Mining&Technology-Beijing,Beijing 100083,China)

机构地区：[1]陕西陕煤曹家滩矿业有限公司,陕西榆林719000 [2]中煤地生态环境科技有限公司,北京100070 [3]中国矿业大学(北京),北京100083

出　　处：《洁净煤技术》2024年第S02期698-703,共6页Clean Coal Technology

摘　　要：煤矸石粉中含有部分微细颗粒悬浮在充填料浆的泌出水中,形成难以沉降的煤矸石粉悬液,严重影响矿山的污水处理和充填效率。为研究煤矸石粉悬液的絮凝沉降特性,利用阴离子型聚丙烯酰胺(APAM)和聚合氯化铝(PAC)开展了不同絮凝剂单耗下煤矸石粉悬液的絮凝沉降试验。结果表明:煤矸石粉悬液的絮凝沉降效率随APAM添加单耗的增大先提高后降低,当APAM单耗为0.5 kg/t时,最大沉降速度为64.28 cm/min,沉降结束时间为1 min。APAM-PAC复合作用能够明显提高煤矸石粉悬液的絮凝沉降效率,在相同APAM添加单耗下,煤矸石粉悬液的沉降效率随PAC单耗的增大呈现先提高后降低的规律。当APAM单耗为0.5 kg/t、PAC单耗为24 kg/t时,最大沉降速度为只添加APAM时的3.43倍,沉降结束时间缩短至0.75 min,沉降效率最高。The coal gangue powder contains some microfine particles suspended in the draining water of the filling slurry,forming a coal gangue powder suspension that is difficult to settle,which seriously affects the efficiency of sewage treatment and filling.In order to study the flocculation and sedimentation characteristics of coal gangue powder suspension,anionic polyacrylamide(APAM)and polymeric aluminum chloride(PAC)were used to carry out the flocculation and sedimentation experiments of coal gangue powder suspension under different unit consumptions of flocculants.The results showed that the flocculation sedimentation efficiency of coal gangue powder suspension increased first and then decreased with the increased of addition unit consumption of APAM.When the unit consumption of APAM was 0.5 kg/t,the maximum sedimentation rate was 64.28 cm/min,and the sedimentation end time was 1min.APAM-PAC composite effect can significantly improve the flocculation and sedimentation efficiency of coal gangue suspension,and the sedimentation efficiency of coal gangue suspension increased with the increased of unit consumption of PAC under the same addition unit consumption of APAM and then decreased.When the unit consumption of APAM was 0.5 kg/t and unit consumption of PAC was 24 kg/t,the maximum settling velocity was 3.43 times that of adding APAM only,the settling time was shortened to 0.75 min,and the settling efficiency was the highest.

关 键 词：煤矸石粉 阴离子型聚丙烯酰胺 聚合氯化铝 絮凝沉降 絮凝剂单耗 

分 类 号：TD849.5[矿业工程—煤矿开采] X752[矿业工程—矿山开采]