铜尾矿浆絮凝沉降及对固化影响研究  

Study on flocculation sedimentation of copper tailings slurry and its effect on solidification

作　　者：石孟利 夏举佩[2] Shi Mengli;Xia Jupei(Faculty of Public Safety and Emergency Management,Kunming University of Science and Technology;Faculty of Chemical Engineering,Kunming University of Science and Technology)

机构地区：[1]昆明理工大学公共安全与应急管理学院 [2]昆明理工大学化学工程学院

出　　处：《黄金》2024年第10期102-108,共7页Gold

基　　金：国家自然科学基金项目(22068019)。

摘　　要：为研究不同絮凝剂单掺及复配对铜尾矿浆的絮凝沉降效果,选用传统无机絮凝剂硫酸铝、无机高分子絮凝剂聚合氯化铝(PAC)及有机絮凝剂阴离子聚丙烯酰胺(APAM)进行单掺及2种无机絮凝剂分别与APAM复配絮凝沉降试验,并将絮凝后的铜尾矿浆进行水泥固化试验。结果表明:在最佳投加量时,3种絮凝剂絮凝效果为APAM>PAC>硫酸铝。在复配试验中,复配组合的沉降效果均优于单独使用。絮凝前后的铜尾矿固化体抗压强度各龄期最低提高了2.4倍,其中,单独使用絮凝剂硫酸铝后的铜尾矿固化体各龄期抗压强度最高,APAM最低;而在复配絮凝剂中,硫酸铝与APAM絮凝后的铜尾矿固化体抗压强度较PAC与APAM絮凝后的高。To investigate the flocculation and sedimentation effects of different single and composite flocculants on copper tailings slurry,traditional inorganic flocculant aluminum sulfate,polymeric inorganic flocculant polyaluminum chloride(PAC),and organic flocculant anionic polyacrylamide(APAM)were selected for experiments.Both single-flocculant tests using all 3 flocculants and composite-flocculant tests using the 2 inorganic flocculants mixed with APAM were conducted.Subsequently,the flocculated copper tailings slurry was tested for cement solidification.Results show that,under the same dosage,the flocculation performance of the 3 flocculants follows the order of APAM>PAC>aluminum sulfate.In the composite tests,the optimal combination of each flocculant resulted in better sedimentation than using them individually.The compressive strength of the solidified copper tailings after flocculation increased by a minimum of 2.4 times at all curing ages.Among the single flocculants,the copper tailings solidified with aluminum sulfate exhibited the highest compressive strength at all curing ages,while APAM had the lowest.For composite flocculants,the combination of aluminum sulfate and APAM produced a higher compressive strength in the solidified copper tailings compared to the PAC and APAM combination.

关 键 词：铜尾矿浆 絮凝沉降 无机絮凝剂 有机絮凝剂 尾矿固化 抗压强度 

分 类 号：TD926.4[矿业工程—选矿]