Yan′an Hecaogou Coal Co. Ltd.
Yan′an Checun Coal (Group) Co. Ltd.
CCTEG Tangshan Research Institute Co. Ltd.

为探寻高矿化度矿井水除盐浓水的适宜出路,基于对除盐浓水中阴阳离子含量的分析,以禾草沟煤矿选煤厂尾矿煤泥水为试验对象,进行了以除盐浓水作为凝聚剂的絮凝沉降试验。结果表明:除盐浓水作为凝聚剂与聚丙烯酰胺配合使用时,满足生产需要的适宜用量为212L/t,此时平均沉降速度为5.52mm/s,上清液浊度为211NTU,效果与聚合氯化铝、氯化镁、氯化钙等三种常规凝聚剂在用量分别为1950,2683,2970g/t时相当;通过理论计算并结合试验结果认为,除盐浓水的凝聚效能的来源主要为电性中和。总体而言,除盐浓水既可作为凝聚剂,在保障絮凝沉降效果的同时有效减少常规凝聚剂的使用,进而提高选煤厂经济效益;又可选择性地作为选煤厂生产补水,从而有效解决了除盐浓水常规处理方式可能带来的环境生态问题。研究结果可为高矿化度矿井水除盐浓水的有效利用提供一定参考。

In order to find an outlet for the desalinized highly-mineralized mine water, an analysis is made of the contents of both cation and anion ions in such water. Based on the result of analysis, the flotation tailing water is taken as the object to explore the sedimentation effect that can be obtained by using the desalinized mine water as flocculating agent. At a proper dosage of 212 L/t of the desalinized water plus polyacrylamide, the mean set tling rate can reach 5.52 mm/s with the turbidity of the supernatant being 211 NTU. The effects obtained is com parable to those when aluminium polychloride, magnesium chloride and calcium chloride are used at a respect ive dosage of 1 950, 2 683, 2 970 g/t. Results of theoretical calculation and test indicate that the flocculating ef fect of the desalinized water is mainly attributed to the electroneutrality effect. Viewed as whole, the use of desa linized mine as flocculating agent can lead to effective reduction of consumption of commonly used agents, be neficial to improvement of economic performance of coal preparation plant. Furthermore its selective use as make-up water of coal washing system can effectively eliminate the risk posed by discharge of mine water to en vironmental ecology.

王立辉,张豹,刘伟,等.高矿化度矿井水除盐浓水用于煤泥水絮凝沉降的试验研究[J].选煤技术,2024,52(1):13-17.

WANG Lihui, ZHANG Bao, LIU Wei, et al. Experimental study on flocculating sedimentation of coal slurry water using desalinized highly-mineral-ized mine water[J]. Coal Preparation Technology,2024,52(1):13-17.