Method for enriching copper and nickel from secondary nickel return material of copper smelting slag

Abstract

The invention discloses a method for enriching copper and nickel from a secondary nickel return material of copper smelting slag, and belongs to the technical field of hydrometallurgy. The secondary nickel return material is a copper slag return material with the Cu / Ni < = 2: 1 obtained by carrying out multi-stage crushing, fine grinding and separation on the copper smelting slag, the secondary nickel return material is pulpified in a sulfuric acid solution to obtain a pulpified solution, and the pulpified solution is further subjected to normal-pressure presoaking and pressure leaching to obtain a nickel-copper-enriched leaching solution. The method for enriching the copper and the nickel from the secondary nickel return material of the copper smelting slag meets the requirements of a nickel electrolysis system precursor solution, solves the problems of low metal yield, high production cost, high environmental protection pressure and the like in the traditional pyrogenic treatment process, and has the outstanding characteristics of short production flow, high metal yield, low production cost, energy conservation and environmental protection.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a method for enriching copper and nickel by secondary nickel return of copper smelting slag. Background technique [0002] Copper smelting slag is mainly Kaldor slag and self-heating slag, after crushing, fine grinding and sorting, granular and flaky copper slag returns and secondary nickel returns are produced. The granular and flaky copper slag returns can be sent directly to copper smelting for processing, and the secondary nickel returns can be sent to the nickel pyroprocessing system for batching treatment. However, the pyroprocessing of this part of the material still has the disadvantages of serious loss of valuable metals such as nickel and copper, and increased energy consumption and production costs. At the same time, the amount of recycling treatment is affected by the mutual content index of copper and nickel and ingredients, so it cannot be used in time, o...

AI Technical Summary

Problems solved by technology

However, the recovery of this part of the material by pyrolysis still has the disadvantages of serious loss of valuable metals such as nickel and copper, and increased energy consumption and production costs.

At the same time, the amount of recycling treatment is affected by the mutual content index of copper and nickel and ingredients, so it cannot be used in time, occupying a large amount of funds, and causing certain economic losses to the production and operation of the enterprise

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