Process for recovering copper, iron and garnet from copper beneficiation tailings

Abstract

The invention relates to a technology for recycling copper, iron and garnets from tailings of copper beneficiation. The iron and the garnets are recycled through reselection operation and table flotation selection operation, collecting agents are added in the table flotation selection operation, so that the content of sulphur in iron ore concentrate and garnet ore concentrate is reduced, and the iron ore concentrate and the garnet ore concentrate are obtained through ore grinding-low intensity magnetic separation operation; the single separation degree of copper minerals is improved by adopting grading-ore grinding operation; the copper minerals are recycled by adopting copper flotation operation, composite restraint agents and composite collecting agents are added in the copper flotation operation, and copper concentrate is obtained through the copper flotation operation, including copper roughing for once, copper scavenging for once and copper concentration for three times. The Fe grade of the recycled iron ore concentrate is larger than 61%, the S grade is less than or equal to 0.3%, and the Fe recovery rate is larger than 51%; the content of the garnets in the garnet concentrate is larger than 97%, and the recovery rate of the garnets is larger than 65%; the Cu grade of the copper concentrate is larger than 22%, and the recovery rate of the Cu is larger than 83%. By means of the technology, the resource utilization rate of the tailings of copper beneficiation is improved, and great social benefit and economic benefit are achieved.

Description

technical field [0001] The invention relates to an ore dressing process for tailings recovery and utilization, in particular to a process for recovering copper, iron and garnet from copper beneficiation tailings. Background technique [0002] With the mining and utilization of mine resources, the resources are increasingly depleted, and the raw ore extracted is generally poor and fine. Therefore, the comprehensive recovery of useful minerals from the tailings produced by ore dressing has received more attention. The discharged ore dressing tailings not only occupy a large area, but also pollute the environment, and it is a pity that a large amount of valuable minerals are wasted. Recovery of useful components from tailings is not only conducive to improving the utilization efficiency of mine resources, but also can provide more raw materials for industrial development. Copper beneficiation tailings have the characteristics of large quantity, complex composition and many min...

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Problems solved by technology

For example, Zhan Jian et al. (2003) studied the process of reclaiming garnet from copper beneficiation tailings, and obtained the concentrate containing garnet 95.40% by using the gravity separation shaker scheme, and the garnet recovery rate was 60.59%; Chang Bao Qian et al. (2011) used the gravity-separated (shaking table) android garnet concentrate and then carried out the weak magnetic iron separation process. The purity of the android garnet reached 98.00%, and the Fe grade of the iron concentrate reached 68.00%, but the iron The S grade in the concentrate is 2.28%, seriously exceeding the standard

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