A kind of copper smelting slag beneficiation method

Abstract

The invention belongs to the technical field of metallurgy and mineral processing, and specifically discloses a copper smelting slag beneficiation method. The copper smelting slag beneficiation method of the present invention comprises the following steps: (1) the copper smelting slag is sequentially subjected to coarse crushing, semi-autogenous grinding, primary classification and secondary classification; (2) entering a stirring tank, adding flotation reagents to adjust pulp; (3) ) followed by one-stage roughing, two-stage roughing, one-stage sweeping, two-stage sweeping and rough beneficiation; (4) followed by magnetic separation, grinding and classification; (3) three-stage flotation. The beneficiation method of the invention adds a new beneficiation process of "pre-weak magnetic separation + high-efficiency fine grinding + multi-stage flotation" after the existing conventional beneficiation process of "roughing + sweeping + beneficiation", which is not only suitable for new systems, It is also suitable for the transformation of old systems, with strong operability, and simultaneously improves the recovery rate of copper and iron in copper smelting slag beneficiation, with low energy consumption.

Description

【Technical field】 [0001] The invention belongs to the technical field of metallurgy and mineral processing, and in particular relates to a copper smelting slag beneficiation method. 【Background technique】 [0002] A large amount of slag will be produced in the copper fire smelting. Generally, the copper content of copper slag is 2%-5%. If these slag cannot be used reasonably, it will not only cause environmental pollution, but also cause waste of copper resources. The reuse of these slags is of great significance for saving resources and protecting the environment. [0003] By analyzing the phase of copper smelting slag, it is found that the main components in copper smelting slag are chalcocite, bornite, magnetite, fayalite and metallic copper. At present, the flotation method is usually used to treat copper smelting slag to recover copper in the slag. Higher, but still caused a certain waste of resources. [0004] At present, some existing technologies have proposed cor...

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Problems solved by technology

For example, the Chinese invention patent application CN 104399573 A a copper slag beneficiation process has improved the recovery rate of copper to a certain extent through multiple grinding and classification, roughing and sweeping, but the copper recovery effect is still not obvious; the Chinese invention patent application CN 106000639 A In a copper smelting converter slag treatment process containing high-grade matte, the white matte non-magnetic material in the slag is directly returned to smelting as a copper concentrate product through magnetic separation, although the loss of copper is reduced, but It is only suitable for beneficiation of copper smelting converter slag containing high-grade matte, but for ordinary copper smelting slag, if magnetic separation is performed first and then grinding and flotation, the magnetic separation efficiency is low in the magnetic separation stage, which is of little significance; Chinese invention patent application CN 102294297 A Magnetic levitation combined beneficiation method for recovering copper from copper smelting converter slag, through magnetic separation after grinding, flotation is carried out, which effectively improves the recovery rate of copper

However, the above-mentioned beneficiation process only improves the recovery rate of copper in the slag, and cannot effectively improve the recovery rate of iron in the slag.

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