摘要
某含萤石铍矿中含BeO 0.33%、CaF_(2) 36.53%,含铍矿物为金绿宝石,其他有用矿物为萤石,主要脉石矿物为方解石、白云石、绿泥石等,碳酸盐含量高达44.80%,选别难度极大。基于金绿宝石与碳酸盐矿物的密度差异,以及与主要矿物的可浮性差异,试验采用重液分选—优先浮选萤石—反浮选脉石的工艺流程处理该矿。针对-15 mm的原矿,首先对-15+0.5 mm粒级产品采用重液分选脱除了35.47%的脉石矿物,其中70%以上为碳酸盐矿物;再合并重液分选精矿与-0.5 mm粒级产品在磨矿细度为-0.074 mm占80%的条件下,采用组合捕收剂丁基黄药+丁铵黑药+乙硫氮浮选脱除方铅矿等硫化矿,然后利用组合捕收剂氧化石蜡皂+油酸钠浮选萤石得到含CaF_(2) 95.02%、回收率为65.96%的萤石精矿,浮选尾矿脱泥后反浮选脉石矿物,可获得含BeO 1.32%、回收率为70.92%的铍精矿。铍精矿后续可采用冶金方法提取获得氧化铍产品。
The grade of BeO and CaF_(2) in a beryllium-fluorite ore are 0.33%and 36.53%respectively.The beryllium mineral is chrysoberyl and another useful mineral is fluorite.The main gangue minerals are calcite,dolomite and chlorite,with the carbonate content as high as 44.80%,which makes it extremely difficult for mineral processing.,,A process of heavy liquid separation-fluorite flotation-reverse flotation of gangue was conducted based on the difference of density and floatability between the target and gangue minerals.For the−15 mm raw ore,35.47%gangue minerals among of which carbonate minerals were over 70%,were removed by heavy liquid separation in the−15+0.5 mm class products.Furthermore,the heavy liquid separation concentrate combined with the−0.5 mm class product was in the grinding fineness of−0.074mm accounted for 80%,and was subjected to flotation using the combined collectors including butylxanthate,ammonium dibutyldithiophosphate,and sodium diethyldithiocarbamate to remove galena and other sulfide minerals.Then fluorite concentrate with CaF_(2) grade of 95.02%and recovery rate of 65.96%was obtained by furether flotation with the combined collectors of oxidized paraffinum sodium salt and sodium oleate.Following the flotation tailings was deslimed,reverse flotation of gangue minerals was adopted to obtain a beryllium concentrate containing 1.32%BeO with a recovery rate of 70.92%.Subsequently,beryllium concentrate can be treated by metallurgical method to obtain beryllium oxide products.
作者
邵伟华
曾永杰
常学勇
王守敬
彭团儿
SHAO Weihua;ZENG Yongjie;CHANG Xueyong;WANG Shoujing;PENG Tuaner(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou 450006,China;China National Engineering Research Center for Utilization of Industrial Minerals,Zhengzhou 450006,China;Key Laboratory for Polymetallic Ores'Evaluation and Utilization,MNR,Zhengzhou 450006,China;Baoshan Mining Co.of Baotou Iron&Steel(Group)Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)
出处
《矿产保护与利用》
2023年第1期98-104,共7页
Conservation and Utilization of Mineral Resources
基金
中国地质调查局地质调查项目(DD20221698)
河南省重点研发专项(221111320300)。
关键词
金绿宝石
萤石
重液分选
浮选
反浮选
脱泥
chrysoberyl
fluorite
heavy liquid separation
flotation
reverse flotation
desliming
