安徽某铁矿山的絮凝沉降方案实验研究-南华大学学报·社科版.PDF

第29卷第1期 南华大学学报(自然科学版) Vol郾29 No郾1 2015年3月 Journal of University of South China(Science and Technology) Mar郾2015 文章编号:1673-0062(2015)01-0041-05 安徽某铁矿山的絮凝沉降方案实验研究 唐自安,杨仕教* (南华大学 核资源工程学院,湖南 衡阳421001) 摘摇 要:安徽某铁矿山采用立式砂仓浓密沉降制备全尾砂原料膏体,制备过程出现了 立式砂仓底流浓度低,溢流水跑浑等问题.为解决立式砂仓浓密存在的一系列问题, 矿山拟采用深锥浓密机方案改造立式砂仓,需对全尾砂絮凝沉降方案开展实验研究. 本次实验的絮凝沉降效果以上清液的澄清度、絮凝沉降底流浓度和沉降率三项指标 综合考虑进行判断.实验第一步骤通过4 种分子量的阴离子聚丙烯酰胺(APAM)沉 降效果比较,优选出1200 万和1600 万的APAM最佳分子量方案;第二步骤实验确 定最佳絮凝剂添加量,实验结果表明,分子量1200 万最佳添加量为10 g/ t ~20 g/ t, 分子量1600 万最佳添加量为20 g/ t~30 g/ t.本次絮凝沉降实验方法将全尾砂浆上 清液的澄清度作为主要判断指标之一,满足了回水再利用的要求,对节约水资源和降 低充填成本具有重要的意义. 关键词:絮凝沉降;上清液;澄清度;底流浓度;沉降率 中图分类号:TD926郾4摇 摇 摇 文献标识码:B Experimental Study on the Flocculant Selection Which is Based on the Supernatant Clarity of the Full Tail Mortar TANG Zi鄄an,YANG Shi鄄jiao* (School of Nuclear Resources Engineering,University of South China,Hengyang,Hunan421001,China) Abstract:An iron mineofAnhuiusesverticalsandbindensesettlementtopreparefulltailing paste material,but in the process the problems of underflow concentration low and overflow mudflow have appeared.In order to solve the problems existed in the vertical sand bin,the mine plansto transformthevertical sandbinintothedeepconethickener.Soweneedtocarry out the experimental study of theflocculationsettlement of wholetailings.Theeffect of floccu鄄 lationof this experiment use the three indicators as the comprehensive judgment:supernatant clarity,the underflowconcentrationofflocculatingsettlingandsedimentationrate.Thefirststep of the experiment isthrough comparison of thefour kindsof molecularweight of anionicpoly鄄 收稿日期:2014-09-12 作者简介:唐自安(1987