Beneficiation method for recovering high iron and high sulfur concentrate from copper tailings containing sulfur and iron

Abstract

The invention discloses a beneficiation method for recovering high iron and high sulfur concentrate from copper tailings containing sulfur and iron. The method includes the technical processes that (1) preconcentrated iron pyrite is obtained by carrying out intermediate intensity magnetic separation-flotation on the copper tailings; (2) the preconcentrated iron pyrite is subjected to preliminary classification, regrinding and low-intensity magnetic separation; (3) reflotation is carried out on tailings subjected to low-intensity magnetic separation, specifically, by carrying out further flotation on the tailings subjected to low-intensity magnetic separation, the flotation high iron and high sulfur concentrate is obtained, and reflotation tailings is filtered out. The method has the advantages that the sulfur and iron resources can be recovered comprehensively, the technical process is simple, the index is stable, field operation and management are easy, the production cost is low, and the chemical dosage is low; the SS grade of the finally obtained high iron and high sulfur concentrate is higher than 25%, the TFe content is higher than 55%, the TFe content of sulfate slag after acid production is higher than 62%, and accordingly comprehensive recovery and utilization of the sulfur and iron resources are achieved.

Description

technical field [0001] The invention belongs to the technical field of tailings re-election, and in particular relates to a mineral processing method for recovering high-iron sulfur concentrate from copper ore tailings, especially suitable for recovery from copper tailings with S 3.5-5.0% and TFe9.0-12.0%. High-iron sulfur concentrate to realize the comprehensive recovery and utilization of sulfur and iron dual resources in copper dressing tailings. Background technique [0002] Copper tailings often contain pyrrhotite-based sulfur and iron resources accompanied by some pyrite and magnetite. If these resources are not recycled, it will cause a waste of resources on the one hand, and on the other hand contain sulfur and iron resources. Oxidation of minerals often produces acidic water and heavy metals, which can easily cause serious pollution to the environment. Therefore, it is necessary to make comprehensive use of them. It can not only effectively use the discarded valuabl...

AI Technical Summary

Problems solved by technology

But it also has its deficiencies: (1) the associated pyrite resources cannot be effectively recovered; (2) under the condition of the grinding particle size of copper beneficiation, the sulfur and iron resources are not fully dissociated, resulting in low sulfur and iron grades. Low

[0005] The advantages of the single flotation process itself are: (1) high grade sulfur concentrate; (2) stable production; its disadvantages are: (1) strong alkali is often used to suppress pyrrhotite and pyrite during copper selection , leading to copper tailings using flotation sulfur separation, this part of the suppressed pyrrhotite and pyrite is difficult to be activated, the consumption of reagents is too large; (2) flotation adopts a closed circuit, and the number of operations is large; (3) Associated magnetite failed to be recovered

The technological process is relatively simple, but the grade of iron concentrate obtained is low, which cannot meet the requirements of commercial iron concentrate, and this process is not suitable for the comprehensive recovery and utilization of iron and sulfur in copper tailings

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