离心重选-浮选脱硫工艺回收细粒级钨锡矿物的试验研究  

Experimental Study on the Recovery of Fine-grained Tungsten and Tin Mineral by Centrifugal Gravity Separation-Flotation Desulfurization Process

作　　者：张婷 李平 冯博[2] 李振飞 ZHANG Ting;LI Ping;FENG Bo;LI Zhenfei(Ganzhou Nonferrous Metallurgy Research Institute Co.,Ltd.,Ganzhou 341000,Jiangxi,China;Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣州有色冶金研究所有限公司,江西赣州341000 [2]江西理工大学,江西赣州341000

出　　处：《黄金科学技术》2022年第1期113-121,共9页Gold Science and Technology

基　　金：国家重点研发计划项目“镍钴/钨/锑战略金属冶金固废清洁提取与无害化技术”(编号:2019YFC1907400);江西省科技重点研发项目“碱煮钨渣无害化处理与综合回收关键技术研究及应用”(编号:20192ACB70008)联合资助。

摘　　要：为有效回收广西某细泥中的钨锡矿物,开展了离心重选—浮选脱硫工艺试验研究。细泥中WO_(3)、Sn含量分别为0.52%和0.31%,其中钨主要为黑钨矿和白钨矿,分别占47.69%和39.42%;锡主要以锡石形式存在,占比为75.48%,其次为硫化物中的锡,占比为17.42%。细泥中-0.03 mm粒级产率为61.36%,其WO_(3)、Sn金属量分布率分别高达78.52%和70.39%,因此强化细粒级钨锡矿物的回收是提高选矿技术经济指标的关键。相比传统的摇床重选工艺,离心重选工艺可以有效提高细粒级钨锡矿物的选别指标,获得更高品位的粗精矿,且WO_(3)、Sn回收率分别提高了34.83%和37.43%。本研究最终采用离心重选—浮选脱硫的联合工艺进行了全流程开路试验,获得了WO_(3)、Sn品位分别为19.46%、9.87%,回收率分别为67.92%、57.52%的钨锡精矿,实现了细粒级钨锡矿物的有效回收。In order to effectively recover the tungsten and tin minerals in a fine mud in Guangxi,a centrifugal gravity separation-flotation desulfurization process test was carried out.The contents of WO_(3) and Sn in the fine mud are 0.52%and 0.31%,respectively.Among them,tungsten is mainly wolframite and scheelite,accounting for 47.69%and 39.42%respectively;tin mainly exists in the form of cassiterite,accounting for 75.48%,followed by tin in sulfide minerals,accounting for 17.42%.The−0.03 mm grain yield rate in the fine mud is 61.36%,and its WO_(3) and Sn metal content distribution rates are as high as 78.52%and 70.39%,respectively.Therefore,strengthening the recovery of fine-grained tungsten-tin minerals is the key of improving technical economic indexes of mineral precessing.A comparative test of reclaiming fine-grained tungsten and tin minerals by shaker gravity separation and centrifugal gravity separation was carried out,and it was found that the centrifugal concentrator equipment has superiority in the gravity separation and recovery of tungsten tin fine sludge.Detailed condition optimization experiments were carried out on the parameters of slurry feeding concentration,feeding time and drum speed that affect the separation effect of the centrifugal concentrator,and the appropriate technological conditions for the centrifugal gravity separation to recovery fine-grained tungsten and tin minerals were obtained.Further improve the grade of tungsten tin concentrate through flotation desulfurization test.The study used the combined process of centrifugal gravity separation and flotation desulfurization to carry out the whole process open circuit test,and obtained tungsten-tin concentrate with WO_(3),Sn grades of 19.46%,9.87%,and the recovery of 67.92%and 57.52%,respectively,realizing the effective recovery of fine-grained tungsten-tin minerals.

关 键 词：细粒级钨锡矿物 细泥 摇床重选工艺 离心重选—浮选脱硫工艺 

分 类 号：TD954[矿业工程—选矿]