云南易门某瘠性白钨尾矿的综合利用研究

Study on Comprehensive Utilization of Barren Scheelite Tailings in Yimen,Yunnan

易门县某白钨尾矿的有价金属WO_(3)含量0.01%、Mo含量0.005%,无回收价值;非金属矿物石英、钙铁榴石、辉石、长石等含量较高,占矿物总量的81.9%,金属矿物含量低,与建筑砂的成分很接近;尾矿+0.15 mm粒级产率70%,满足《建筑用砂》(GB/T 14684—2011)规定的建筑砂国标粒度要求。为高效综合利用该尾矿,在参考白钨尾矿综合利用现状的基础上,设计了该尾矿的综合利用工艺,采用脱泥脱药—强磁选除铁—浮选脱硫氟—筛分工艺处理该尾矿,最后获得的砂样基本满足建筑用砂的性能要求,年利润可达587.35万元。该钨尾矿整体利用为建筑砂有利于实现钨尾矿减量化,提高尾矿资源的附加值。

The contents of valuable components WO_(3) and Mo in a scheelite tailing in Yimen County is 0.01%and 0.005%,respectively,which have no recycling value.The contents of gangue minerals such as quartz,andradite,pyroxene and feldspar are relatively high,accounting for 81.9%of the total miner⁃als,and the contents of metallic minerals are low,which is close to the composition of building sand.The yield of tailings with particle size of 0.15 mm is 70%,which meets the national standard particle size re⁃quirements of buliding sand stipulated in“Sand for Building”(GB/T 14684-2011).In order to efficiently and comprehensively utilize the tailings,the comprehensive utilization process of the tailings was designed on the basis of referring to the current situation of comprehensive utilization of scheelite tailings.The finally obtained sand samples basically meet the performance requirements of construction sand after treating the tailings with desliming and reagent removal,iron removal using magnetic separation,desulfuration and flu⁃orine using flotation,and screening process.The annual profit can reach 5.8735 million yuan.The overall utilization of the tungsten tailings as building sand is beneficial to realize the reduction of tungsten tailings and increase the addition value of tailings resources.