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首页> 外文会议>XXI International Mineral Processing Congress >EFFECT OF CA~(2+) AND S_2O_3~(2-) ON THE FLOTATION OF PENTLANDITE IN REAL ORE SYSTEM
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EFFECT OF CA~(2+) AND S_2O_3~(2-) ON THE FLOTATION OF PENTLANDITE IN REAL ORE SYSTEM

机译：Ca〜（2+）和S_2O_3〜（2-）对实际矿石体系中膨润土浮选的影响

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Recovery and selectivity depend on several factors in sulfide flotation. With nickel ores low selectivity between sulfides is often a problem, particularly between pentlandite and pyrrhotite. Process water always contains ions like Ca~(2+), S_2O_3~-, SO_4~(2-), S_3O_6~(2-), S_4O_6~(2-), F~-, NH_2SO_3~-, Cl~-, NO_3, SCN~-, which may influence the surface chemistry and thereby the floatability of minerals. The purpose of this research was to study the effect of Ca~(2+) and S_2O_3~(2-) ions on nickel and copper flotation. The study was done in laboratory scale with real ore samples. The tests were done at alkaline pH. Purified sodium ethyl xanthate was used as a collector while Ca~(2+) and S_2O_3~(2-) ions were tested. The concentrate was collected according to predetermined time-schedule. The ions had an activating effect on pentlandite and chalcopyrite when the test material was ground in steel mill but the floatability of sulfides decreased when grinding was done in ceramic mill. Particularly, the ions had an activating effect in the beginning of flotation after grinding in steel mill when the floatability of sulfides was based on the collector-induced hydrophobicity. On the basis of the results possible activation and depression mechanisms are also suggested.
机译：回收率和选择性取决于硫化物浮选中的几个因素。对于镍矿石，硫化物之间的选择性低通常是一个问题，尤其是在膨润土和黄铁矿之间。工艺用水始终包含Ca〜（2 +），S_2O_3〜-，SO_4〜（2-），S_3O_6〜（2-），S_4O_6〜（2-），F〜-，NH_2SO_3〜-，Cl〜-， NO_3，SCN〜-，可能会影响表面化学，从而影响矿物的漂浮性。本研究的目的是研究Ca〜（2+）和S_2O_3〜（2-）离子对镍和铜浮选的影响。该研究是在实验室规模下用真实矿石样品完成的。测试在碱性pH下进行。纯化的乙基黄药酸钠用作收集剂，同时测试Ca〜（2+）和S_2O_3〜（2-）离子。按照预定的时间表收集浓缩物。当在钢磨中研磨测试材料时，离子对五碳石和黄铜矿具有活化作用，但在陶瓷磨中研磨时，硫化物的漂浮性降低。特别地，当硫化物的漂浮性基于集电极引起的疏水性时，离子在钢厂研磨后的浮选开始时具有活化作用。根据结果​​，还提出了可能的激活和抑制机制。

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