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金属矿山 ›› 2016, Vol. 45 ›› Issue (02): 95-98.

• 矿物工程 • 上一篇    下一篇

洛南某钼矿堆存废石X射线辐射预选试验

刘明宝1,2,杨超普1,2,阎赞1,2,印万忠3   

  1. 1.陕西省尾矿资源综合利用重点实验室,陕西 商洛 726000;2.商洛学院化学工程与现代材料学院,陕西 商洛 726000;3.东北大学资源与土木工程学院,辽宁 沈阳 110819
  • 出版日期:2016-02-15 发布日期:2016-03-11
  • 基金资助:

    * 商洛市科技局项目(编号:SK2014-01-10),商洛学院博士专项(编号:14SKY029)。

Study on X Fluorescence Pre-separation of a Molybdenum Stockpiling Waste Rock from Luonan

Liu Mingbao1,2,Yang Chaopu1,2,Yan Zan1,2,Yin Wanzhong3   

  1. 1.Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo 726000,China;2.College of Chemical Engineering and Modern Material,Shangluo University,Shangluo 726000,China;3.College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China
  • Online:2016-02-15 Published:2016-03-11

摘要: 洛南某钼矿投产至今积累了大量堆存废石。为充分利用矿产资源,降低废石堆存对环境的影响,对该废石经破碎—检查筛分后获得的钼品位为0.051%、粒度为20~150 mm的物料进行了X射线辐射预选试验。结果表明:在激发电压为45 kV、滤光片数目为6片、给矿频率为27.5 Hz、分离阈值为0.42条件下,经辐射分选机预选,可以获得钼品位为0.125%、作业回收率为88.10%、对原矿回收率为81.05%的预选精矿。为给该预选精矿的选别提供依据,对其进行了工艺矿物学分析。预选精矿中有用矿物主要为辉钼矿,存在于辉钼矿中的钼占总钼的96.56%;脉石矿物主要为长石,其次为石英和石榴子石、方解石等。预选精矿破碎至-1 mm后,辉钼矿在+0.18 mm粒级的分布率为24.10%,在-0.075 mm粒级的分布率为64.64%,宜采用阶段磨矿—阶段选别的工艺进行回收。

关键词: 堆存废石, X射线预选, 工艺矿物学

Abstract: There has been accumulated massive storage waste rock on a molybdenum mine in Luonan.Pre-separation experiments by X fluorescence were conducted on materials with particle size of 20~150 mm,molybdenum grade of 0.051%,for comprehensive utilize of the resource and reduce environment influence caused by waste rock accumulation.Results indicated that pre-concentrate with molybdenum grade of 0.125%,yield recovery of 88.10%,and total recovery of 81.05% was obtained when excitation voltage of 45 kV,filter number of 6,feeding frequency of 27.5 Hz and the separation threshold of 0.42 by radiation sorting machine pre-separation.To provide technique basis for beneficiation of pre-concentrate,process mineralogy research was conducted.Main valuable mineral of pre-concentrate is molybdenite,96.56% of molybdenum exists in molybdenite.Gangue minerals are mainly feldspar,followed by quartz,garnet and calcite,etc.24.10% molybdenite distributed in +0.8 mm fraction,64.64% molybdenite distributed in -0.075 mm fraction after crushed to -1 mm.Stage grinding-stage separation process was recommended for reasonably recovery of the ore.

Key words: Stockpiling waste rock, X fluorescence pre-separation, Process mineralogy