云南某白钨矿加温浮选尾矿再回收试验研究  

Experimental Study on Rerecovery of Tailings from a Scheelite Heating Flotation in Yunnan Province

作　　者：刘泽洪 白俊智 刘显华 李彬 李欢 LIU Zehong;BAI Junzhi;LIU Xianhua;LI Bin;LI Huan(Wenshan Malipo Zijin Tungsten Industry Group Co.,Ltd.,Wenshan 663600,Yunnan,China;Zijin Mining Group Co.,Ltd.,Shanghang 364200,Fujian,China)

机构地区：[1]文山麻栗坡紫金钨业集团有限公司,云南文山663600 [2]紫金矿业集团股份有限公司,福建上杭364200

出　　处：《中国钨业》2024年第2期46-52,69,共8页China Tungsten Industry

摘　　要：云南某白钨矿采用常温粗选、加温精选的浮选工艺,目前该白钨矿加温精选尾矿WO3品位达到0.27%,因此对该加温浮选尾矿进行浮选回收钨金属试验研究具有经济意义。由于该加温浮选尾矿矿浆浓度偏低为10.20%,且在加温浮选作业过程经水玻璃高温、长时间搅拌,白钨矿受到强烈抑制,再浮选回收率低,精矿品位难以得到提升。经过探索试验研究,将加温浮选尾矿矿浆浓度预先浓缩到40%,添加500 g/t水玻璃、400 g/t氧化石蜡皂进行粗选,可获得粗精矿WO3品位为1.741%,回收率为73.09%的粗选指标。选出的粗精矿经添加高效组合抑制剂(水玻璃15000 g/t+高效抑制剂BTF 15000 g/t)进行常温一粗三精的开路精选试验,可获得精矿WO3品位为11.65%、回收率为43.86%的精选指标。最终闭路试验流程为:加温浮选尾矿经过一次粗选二次扫选得到粗精矿后,经一次粗精选三次精选,可获得钨精矿WO3品位为10.52%、回收率为51.79%的选矿指标。A scheelite mine in Yunnan province adopts a flotation process involving rougher flotation at room temperature followed by cleaner flotation at elevated temperatures.Currently,the grade of the tailings from heated flotation reaches 0.27%,making it economically viable to conduct tests on the flotation recovery of tungsten from these tailings.Due to the low concentration(10.2%)of the heated tailings,the strong inhibition of scheelite by high-temperature sodium silicate,and prolonged stirring during the heated flotation process,the recovery rate of re-flotation is low,and it is difficult to improve the concentrate grade.Through experimental exploration,the pulp concentration of the heated tailings is pre-concentrated to 40%.By adding 500 g/t sodium silicate and 400 g/t oxidized paraffin soap,a coarse concentrate grade of 1.741% and a recovery rate of 73.09% are achieved.A high-efficiency combination inhibitor(15,000 g/t sodium silicate+15,000 g/t BTF)is then used,and the selected rough concentrate underwent an open-circuit flotation test at room temperature,with one rougher stage and three cleaner stages,achieving a WO3 grade of 11.65% and a recovery rate of 43.86%.In the final closed-circuit process,following one rougher stage and two scavenger stages,the coarse concentrate is subjected to one rougher and three cleaner stages,resulting in a tungsten concentrate with a grade of 10.52% and a recovery rate of 51.79%.

关 键 词：尾矿浮选 矿浆预先浓缩 常温精选 高效组合抑制剂 

分 类 号：TD954[矿业工程—选矿]