铜镍硫化矿浮选过程中MgO脉石矿物的抑制途径探析

我国镍矿石资源主要为富含MgO硅酸盐脉石矿物的低品位铜镍硫化矿。长期以来,以金川公司为代表的主要铜镍矿山,一直将浮选精矿降镁作为选矿技术攻关的重点。尽管国内外研究人员开展了大量的研究工作,铜镍硫化矿浮选过程中MgO脉石矿物的抑制至今未能在技术上找到可控的解决方法。文章对MgO脉石矿物抑制研究的相关文献进行了综述分析,提出采用复合抑制剂,即络合剂-抑制剂组合,先对有用矿物和脉石矿物进行表面清洗以扩大其可浮性差异,再选择性抑制MgO脉石矿物,这将是铜镍硫化矿浮选过程中抑制MgO硅酸盐脉石矿物的有效途径。

Analysis of Effective Approaches for Depressing MgO-containing Gangue Minerals in Copper-nickel Sulfide Ore Floatation

Nickel ore resources in China are mostly low-grade copper-nickel sulfide ores with high percentage of MgO-containing silicate gangue minerals.Major copper-nickel mines in China,such as Jinchuan Group Ltd.,have been striving to lower the magnesium content of floatation concentrate.Although lots of researches have been done,the depressing of MgO-containing gangue minerals in copper-nickel sulfide ore floatation is not technically controllable.Related literatures on depressing of MgO-containing gangue minerals have been reviewed.It is suggested that highly effective composite depressant,that is,a complexing agent-depressant combination,should be employed to depress MgO-containing silicate gangue minerals.A complexing agent is used to clean the surfaces of valuable minerals and gangue minerals,which will increase their floatability difference.In the meantime,a selective depressant is applied to depress MgO-containing gangue minerals.This will be the effective approach for depressing MgO-containing silicate minerals in copper-nickel sulfide ore floatation.