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首页> 外文期刊>International Journal of Mineral Processing >Malachite and heterogenite behavior during the locked-cycle recycling of process water in flotation of copper-cobalt oxide ores
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Malachite and heterogenite behavior during the locked-cycle recycling of process water in flotation of copper-cobalt oxide ores

机译：铜钴氧化物矿浮选工艺用水的锁定循环回收过程中的孔雀石和异质岩行为

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摘要

The behavior of malachite and heterogenite was investigated during the process water recycling in flotation of copper-cobalt oxide ores from the deposit of Luiswishi located in Haut-Katanga province (DRC). A synthetic mill wastewater (SMWW) was utilized as feed water alone and in mixture with water recovered from the flotation tails in view to achieve at the laboratory scale the locked-cycle recycling of the industrial mill wastewater (IMWW). To simulate the chemical species presence in the pulp water and their effects on the flotation of malachite and heterogenite, calcium, magnesium and bicarbonate ions were added to the feed water and the recoveries of copper and cobalt followed during the roughing flotation stage. The concentrate XRD and SEM analyses together with the floated minerals microanalyses by EDX spectroscopy, leaching tests of mono-minerals followed by the Pourbaix diagrams construction and DRIFT spectroscopic analyses, have enabled identifying changes in the surface properties of malachite and heterogenite and describing their behaviors. It was concluded that the locked-cycle recycling of process water is inducing the build-up of chemical species in the pulp, which favors the exaggerated dissolution and hydration of malachite and heterogenite interfering on the recovery of copper (40%) and cobalt (58%) with a significant drop in their concentrate grades (73% Cu and 2.7% Co). The deterioration of the concentrate characteristics results also from the gangue minerals entrainment. A better description of the valuable minerals behavior in the SMWW presence could enable designing strategies in view enhancing their floatability during the locked-cycle recycling of water. (C) 2016 Elsevier B.V. All rights reserved.
机译：在位于上加丹加省（DRC）的Luiswishi矿床浮选铜钴氧化物矿石的过程用水循环过程中，研究了孔雀石和异质岩的行为。合成工厂废水（SMWW）单独用作给水，并与从浮选尾部回收的水混合使用，目的是在实验室规模上实现工业工厂废水（IMWW）的锁定循环回收。为了模拟纸浆水中化学物质的存在及其对孔雀石和杂铜矿浮选的影响，在粗选浮选阶段将钙，镁和碳酸氢根离子添加到进水中，然后回收铜和钴。 XRD和SEM精矿分析以及EDX光谱法对浮选矿物的微分析，单矿物的浸出试验，随后的Pourbaix图构造和DRIFT光谱分析，使得能够识别孔雀石和异质岩的表面性质变化并描述其行为。结论是，过程水的循环锁定循环正在导致纸浆中化学物质的积累，这有利于孔雀石和杂质岩的过度溶解和水化，干扰了铜（40％）和钴的回收（58）。 ％），其精矿品位（73％的铜和2.7％的钴）显着下降。煤concentrate石矿物夹带也导致精矿特性的恶化。更好地描述SMWW存在下有价值的矿物行为，可以使设计策略更加有效地锁定水循环中的漂浮性。 （C）2016 Elsevier B.V.保留所有权利。

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