应用SLon离心机回收江西某钨细泥中钨

提高钨细泥回收率是提升钨资源利用水平的一个重要途径，离心分选是处理微细粒钨矿物的有效方法之一。江西某钨矿产生的钨细泥WO3品位为0.62%，-50 μm粒级含量为56.83%，其WO3分布率高达87.59%。为实现该钨细泥中钨及伴生钼铋的有效回收，采用“浮选脱硫—SLon离心机重选”工艺进行条件优化试验研究，并在最优条件下进行了工业试验。结果表明，浮选脱硫试验中丁基黄药最佳用量为160 g/t，SLon离心机重选最佳转鼓转速和冲洗水量分别为680 r/min、1.6 L/min；在钨细泥给矿WO3、钼和铋品位分别为0.52%、0.088%和0.073%的条件下，经“浮选脱硫—离心机选钨”工艺流程，工业试验最终获得了WO3品位25.20%、WO3回收率73.66%的钨精矿，及钼和铋品位分别为7.43%、5.31%的含硫产品，对应回收率为56.57%和48.74%，指标良好。采用“浮选脱硫—SLon离心机重选”工艺处理江西某钨矿产生的钨细泥，年增加钨、钼、铋的金属量分别为11.4 t、5.89 t和1.7 t，可实现年新增产值约200万元，经济效益显著。

Application of SLon Centrifugal Separators in Recovering Tungsten from Tungsten Slime in Jiangxi Province

Abstract It is an important way to improve the utilization level of tungsten resources through improving the recovery rate of tungsten fine slime. Centrifugal separation is one of the effective methods to treat fine tungsten minerals. The grade of WO3 in tungsten slime from a Jiangxi tungsten ore is 0.62%， and the content of -50 μm is 56.83%， in which the distribution rate of WO3 is 87.59%. In order to realize the effective recovery of tungsten and associated molybdenum and bismuth in the fine tungsten slime， the process of "flotation desulfurization and SLon centrifuge gravity separation" was used to optimize the experimental conditions， and the industrial test was carried out under the optimal conditions. The results showed that the optimum dosage of butyl xanthate was 160 g/t in flotation desulfurization test， and the optimal drum speed and washing water volume of SLon centrifuge were 680 r/min and 1.6 r/min， respectively. Under the conditions of tungsten grade of 0.52%， molybdenum grade of 0.088% and bismuth grade of 0.073%， the industrial test was carried out by the technological process of "flotation desulfurization and SLon centrifuge gravity separation". Finally， tungsten concentrate with WO3 grade of 25.20% and recovery rate of 73.66% was obtained. Meanwhile， sulfur-bearing production with molybdenum grade of 7.43% and bismuth grade of 5.31% were obtained， with corresponding recovery rates of 56.57% and 48.74%，indicated the better indexes. When the technology of "flotation desulfurization and SLon centrifuge gravity separation" was used to treat tungsten slime from a tungsten mine in Jiangxi Province， the annual increase of tungsten， molybdenum and bismuth metal amounts is 11.4 t， 5.89 t and 1.7 t， and the annual output value is about 2 million yuan， bringing about the remarkable economic benefit.