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 simultaneous reduction, leaching, oxidation and iron removal of cobalt-copper ore, and belongs to the field of chemical engineering. Background technique [0002] The existing cobalt-copper ore generally adopts a two-stage leaching method. First, the metal cobalt and copper are 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. During the leaching process of ore, various auxiliary materials are consumed, and the metal recovery rate is not high. [0003] The main disadvantages are: long process flow, high cost, low efficiency and time-consuming. Summary of the invention [0004] The purpose of the present invention is to provide a production method with simple process flow, high metal recovery rate, low production cost and low environmental pollution by cobalt copper ore reduction...

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