Flotation process for open-air low-grade copper ore

Abstract

According to the open-air low-grade copper ore flotation technology, by adjusting the dosage of flotation reagents and selecting and matching flotation devices of different models and numbers according to the property of raw ore, primary efficient enrichment of copper concentrate is achieved in the rough scavenging stage, secondary enrichment of the copper concentrate is completed in the fine selection process, the grade of the copper concentrate can be guaranteed, and the flotation efficiency of the copper concentrate is improved. And the copper concentrate recovery rate can be considered. After the flotation process is operated, the accumulated copper concentrate grade and the copper recovery rate are obviously improved, and the production index is good. Meanwhile, flotation equipment does not need to be additionally arranged in the process, when the process is used for raw ore with the grade of 0.13% and 0.22%, two KYF-200 flotation machines can be reduced compared with the prior art, the power consumption can be reduced by 381.25 million kw.h every year, and the electric charge is saved by 132.67 million yuan. According to the method, the problem of index fluctuation caused by raw ore property change on the basis of an inherent production process is solved, and a new thought is explored for solving the problem.

Description

technical field [0001] The invention belongs to the technical field of beneficiation, and in particular relates to a flotation process for open-pit low-grade copper ore. Background technique [0002] The copper flotation process in the prior art is mainly aimed at the flotation of deep underground copper mines. However, with the gradual deepening of open-pit mining and stripping, the open-pit copper-bearing iron ore body has been fully exposed, and the conditions for sub-mining and sub-heap sorting are met. However, after a period of production experiments, it has been shown that the original design copper series rough sweeping + copper series selection process or iron series rough sweeping + iron series selection process, the production indicators are poor, because the copper grade of the open-pit copper mine It is relatively low and has a high degree of oxidation. It is difficult for the current process and chemicals to effectively recover copper oxide ore. In the roughing...

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Problems solved by technology

[0002] The existing copper flotation process is mainly aimed at the flotation of deep underground copper mines. However, with the gradual deepening of open-pit mining and stripping, the open-pit copper-bearing iron ore body has been fully exposed, and the conditions for separate mining and stacking are met. However, after a period of production experiments, it has been shown that the original design copper series rough sweep + copper series beneficiation process or iron series rough sweep + iron series beneficiation process, the production indicators are poor, the reason is that the copper grade of the open-pit copper mine The copper oxide ore is relatively low and the degree of oxidation is high. The current process and reagents are difficult to effectively recover the copper oxide ore. At the same time of secondary enrichment, the lower layer minerals cannot be effectively sorted and are lost into the tailings, which eventually leads to high grades of copper concentrate and tailings. At the same time, there are many sets of equipment for the iron series rough sweeping process and large power consumption

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