Synchronized production method of reducing leaching and oxidizing deironing of cobalt-copper ore

Abstract

The present invention discloses a synchronized production method of reducing leaching and oxidizing deironing of cobalt-copper ore, including the following steps: crushing and mixing the cobalt-copper ore into cobalt copper slurry, then adding sulfuric acid into the cobalt-copper slurry for leaching with a temperature controlled at 75-85 DEG C, stirring while adding a reducing agent for reducing leaching with an amount of 4-6% of the total cobalt-copper ore, controlling cobalt content in wet residue to be less than 0.2% and copper content less than 0.3%, controlling of the reaction temperature to be 90-95 DEG C and reaction time being 1 to 4 hours, slowly adding alkali to adjust the PH value of the solution to 2.0-3.5, at the same time slowly supplementarily adding cobalt copper slurry for oxidizing deironing according to the content of Fe2+ in solution to make Co3+ and Fe2+ to reach a equilibrium state, and finally performing the solid-liquid separation to obtain qualified leachate. According to the invention, by controlling the electrode potential of the solution, synchronized performance of the reducing leaching process - the oxidizing deironing process is ensured, so direct production cost is significantly reduced, the metal recovery is significantly improved, thus improving production efficiency.

Description

technical field [0001] The invention relates to a production method for synchronous reduction, leaching, oxidation and iron removal of cobalt-copper ore, which belongs to the field of chemical industry. Background technique [0002] The leaching of existing cobalt-copper ores generally adopts a two-stage leaching method. First, metal cobalt and copper are leached from the ore into the solution with a reducing agent, and then an oxidizing agent is added to oxidize and remove impurities such as iron. The qualified solution is sent for extraction. This method cobalt-copper During the leaching process of ore, the consumption of various auxiliary materials is relatively large, and the metal recovery rate is not high. [0003] Its main disadvantages are: long process flow, high cost, low efficiency and time-consuming. Contents of the invention [0004] The purpose of the present invention is to provide a production method in which reduction, leaching, oxidation and iron removal...

AI Technical Summary

Problems solved by technology

[0002] The leaching of existing cobalt-copper ores generally adopts a two-stage leaching method. Firstly, the metal cobalt-copper is leached from the ore into the solution with a reducing agent, and then an oxidant is added to oxidize and remove impurities such as iron. The qualified solution is sent for extraction. This method cobalt-copper During the leaching process of ore, the consumption of various auxiliary materials is relatively large, and the metal recovery rate is not high

[0003] Its main disadvantages are: long process flow, high cost, low efficiency, time-consuming