铝土矿正浮选尾矿沉降试验研究  

The sedimentation tests on the tailings from bauxite direct-flotation

作　　者：姜燕清[1] 王毓华[1] 杨键[1] 俞亚文[1] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《轻金属》2010年第12期7-10,16,共5页Light Metals

基　　金：国家重点基础研究发展规划(973)项目(2005CB623701)

摘　　要：采用沉降试验法研究了不同pH值及用量下,不加助凝剂、加无机凝聚剂(FeSO4.7H2O、PAC和PFS)和有机絮凝剂PAM对尾矿沉降的影响规律。结果表明,颗粒表面电性是影响尾矿沉降的重要因素,不加助凝剂时调节矿浆pH=7左右可实现尾矿的较好沉降。阴离子型PAM能显著提高铝土矿浮选尾矿浆的沉降速度,但亦需先调节矿浆pH至7左右,pH过高或过低都不利于尾矿浆的絮凝沉降。PAM与FeSO4.7H2O的组合,既可得到良好沉降效果,又可降低PAM和FeSO4K.7H2O的用量,具有较好的应用前景。The influence rules for the settlement of tailings from bauxite direct-flotation were investigated under the different pulp pH and dosage of inorganic coagulants（such as FeSO4·7H2O,PAC and PFS） and PAM.The results show that the surface static potential of particles is the key effect factor for the settlement of tailings.The good settlement of tailings can be achieved when the pH value of pulp was adjusted to around 7 without any coagulant.Anionic PAM can increase the sedimentation rate of bauxite flotation tailings evidently,but the pulp pH should be adjusted around 7.The settlement will become worse while pulp pH is higher or lower than 7.The combination of PAM and FeSO4·7H2O could produce good sedimentation results for tailings,and the dosage of PAM and FeSO4·7H2O can also be decreased.,so it shows good application prospect.

关 键 词：铝土矿 尾矿 沉降 絮凝剂 凝聚剂 

分 类 号：TD926.4[矿业工程—选矿]