2-hydroxyphosphonoacetic Acid to Eliminate the Adverse Effect of Serpentine on Chalcopyrite Flotation
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摘要:
这是一篇矿物加工工程领域的论文。对于蛇纹石型硫化矿的浮选，由于蛇纹石容易泥化，会恶化硫化矿的浮选。为了解决这一问题，本文首次使用2-羟基膦酰基乙酸(HPAA)来消除蛇纹石对黄铜矿浮选的负面影响。本文通过微浮选实验、浊度实验、Zeta电位测试、吸附量测试和XPS测试来研究HPAA在黄铜矿/蛇纹石浮选体系中的影响以及作用机理。实验表明，蛇纹石带正电，黄铜矿带负电，由于静电吸引作用，蛇纹石细泥会吸附在黄铜矿的表面，从而抑制黄铜矿的浮选。加入HPAA后，黄铜矿的浮选回收率由47.85%提高到92.44%。其机理是HPAA与蛇纹石的Mg2+发生了化学吸附，显著降低蛇纹石表面电位，使矿物颗粒产生斥力作用，从而恢复黄铜矿的可浮性。
Abstract:This is an article in the field of mineral processing engineering. For the flotation of sulfide ores whose gangue mineral is serpentine, serpentine can deteriorate the flotation of sulfide ores due to its easy mudification. To solve this problem, 2-hydroxyphosphonoacetic acid (HPAA) was used for the first time in this paper to eliminate the negative effect of serpentine on chalcopyrite flotation. In this article, the effect of HPAA on chalcopyrite/serpentine flotation system and the mechanism of action were investigated by microflotation test, turbidity test, zeta potential test, adsorption amount test and XPS test. The tests showed that serpentine is positively charged and chalcopyrite is negatively charged. Due to the electrostatic attraction, serpentine slime will adsorb on the surface of chalcopyrite, thus inhibiting the flotation of chalcopyrite. After adding HPAA, the flotation recovery of chalcopyrite was increased from 47.85% to 92.44%. The mechanism was that HPAA chemisorbed with Mg2+ of serpentine, which significantly reduced the surface potential of serpentine and caused repulsive effect on mineral particles, thus recovering the floatability of chalcopyrite.
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Key words:
- Mineral processing engineering /
- Serpentine /
- Chalcopyrite /
- HPAA /
- Flotation
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表 1 蛇纹石化学多元素分析/%
Table 1. Chemical multi-element analysis of serpentine
MgO SiO2 Al2O3 CaO Fe2O3 其他 39.38 53.55 0.11 0.61 1.05 5.3 
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表 2 黄铜矿化学多元素分析/%
Table 2. Chemical multi-element analysis of chalcopyrite
Cu Fe S Ni Al 其他 33.24 29.29 32.39 0.015 0.144 5.06
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表 3 矿样表面原子浓度/%
Table 3. Atomic concentration on the surface of the mineral samples
名称 C 1s O 1s Si 2p Mg 1s P 2s 蛇纹石 8.09 52.98 15.73 23.20 - 蛇纹石+HPAA 9.62 53.38 14.22 22.36 0.42 黄铜矿 24.97 25.07 - - - 黄铜矿+HPAA 25.03 24.97 - - -
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