某细粒铜尾矿絮凝沉降充填性能研究与实践  

Research and Practice on Flocculation Settlement Filling Performance of a Fine Copper Tailings

作　　者：商鹏 余茂杰 张保 SHANG Peng;YU Maojie;ZHANG Bao(Tongling Nonferrous Metals Group Co.,Ltd.)

机构地区：[1]铜陵有色金属集团股份有限公司,安徽省铜陵市244001

出　　处：《现代矿业》2023年第2期44-46,共3页Modern Mining

摘　　要：为了比较某细粒铜尾矿絮凝沉降充填与自然沉降充填效果的差异,在进行了自然沉降和絮凝沉降试验的基础上进行了自然沉降充填与絮凝沉降充填工业实践。结果表明:自然沉降情况下料浆浓度升高,沉降速率降低,底流浓度升高,底流浓度最大可达68%;絮凝剂可显著提高全尾砂沉降速率,浓度为20%的尾矿浆添加20 g/t的PAM,全尾砂沉降速率提高4.66倍,底流浓度下降6个百分点;进料浓度升高,全尾砂絮凝沉降速率降低,底流浓度升高,絮凝沉降底流浓度达55%左右;自然沉降充填体与絮凝沉降充填体相比,有效取芯率、完整性和有效试样数均略逊,2种工艺的充填体有效试样强度均满足充填体强度要求。In order to compare the difference between flocculation settlement filling and natural settlement filling of a fine copper tailings,the industrial practice of natural settlement filling and flocculation settlement filling was carried out based on the experiments of natural settlement and flocculation settlement.The results showed that in the natural settlement,the sedimentation rate decreases and the bottom flow concentration increases with the increase of slurry concentration,and the maximum bottom flow concentration reached 68%.The flocculant could significantly improve the settlement velocity of whole tailings.When the concentration of tailings slurry was 20%,adding 20 g/t PAM could increase the settlement velocity of whole tailings by 4.66 times,the bottom flow concentration decreased by six percentage points.With the increase of feeding concentration,the sedimentation velocity decreases and the bottom flow concentration increases,and the bottom flow concentration reaches about 55%.The effective core extraction rate,integrity and available samples of the natural settlement backfill were not as good as those of the flocculated settlement backfill,and the strength of effective samples of the backfill by the two processes all meet the strength requirements of the backfill.

关 键 词：全尾砂 自然沉降 絮凝沉降 沉降速率 充填体强度 

分 类 号：TD853.34[矿业工程—金属矿开采]