Leaching method of copper-cobalt sulfide ore

Abstract

The invention discloses a leaching method of copper-cobalt sulfide ore. The leaching method comprises the following steps of: (1) grinding raw ore to obtain copper-cobalt sulphide ore with preset fineness; (2) mixing the copper-cobalt sulphide ore obtained in the step (1) and sulfuric acid solution according to the solid-liquid ratio (2-10):1 and pulping to obtain ore pulp; (3) adding sodium chlorate into the ore pulp, stirring the ore pulp at a set temperature, leaching for 2-10 hours under normal pressure, and filtering to obtain leaching solution. The leaching method disclosed by the invention has the beneficial effects that the copper-cobalt sulfide ore is leached by adopting a sodium chlorate-sulfuric acid system under the normal pressure, so that the requirement for equipment is low,the production period is short, the energy consumption is low, high-efficiency leaching of the copper-cobalt sulfide ore with low grade and complex components is realized, the cobalt leaching rate isup to 99% or above, and the cost and the risk of enterprises are greatly reduced; the intermediate product of an oxidizing agent is ClO2 which is internationally-recognized safe and non-toxic pollution-free disinfectant, and no pollution is caused in the whole leaching process, so that the purpose of clean production is realized.

Description

Technical field [0001] The invention belongs to the technical field of mineral processing, and specifically relates to a method for leaching copper-cobalt sulfide ore. Background technique [0002] my country is a country lacking cobalt resources. The main feature of cobalt resources is that there are many poor ores, and there are almost no primary and richer cobalt deposits. Cobalt mainly exists in the form of symbiotic elements in veins such as nickel, copper and iron. With the rapid growth of lithium-ion batteries, my country’s demand for cobalt is also increasing. At present, most of them rely on imports, the cost is relatively high, and the import risk is relatively high. The recovery rate is low. In actual production, the leaching methods of copper-cobalt sulfide ore include: high-pressure leaching, fire-wet combined method, atmospheric leaching and biological leaching. [0003] At present, the commonly used method for leaching copper-cobalt sulfide ore is high-pressure acid ...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used method for leaching copper-cobalt sulfide ore is oxygen high-pressure acid leaching. This process requires high equipment and has certain risks. above), the leaching efficiency is low

Chinese patent CN105568000A proposes "a cobalt-containing sulfide and water cobalt ore combined high-pressure acid leaching method". Although this method does not require the addition of reducing agents and oxidizing agents, it also avoids most of the iron entering the solution, reducing the cost of leaching and purification. , but this method has strict requirements on raw materials and equipment, and cannot be applied to copper-cobalt sulfide ores of different grades and complex compositions.

Chinese patent CN100999782A proposes "a comprehensive recovery method of polymetallic sulfide ore", adding appropriate amount of lime and potassium chloride to the raw ore of polymetallic sulfide ore for sulfate roasting, combining roasting process and hydrometallurgical process, In the smelting process of this kind of method, copper and cobalt are scattered into various processes, resulting in serious losses, high energy consumption, long production cycle, complicated process and difficult to control, high equipment investment cost, and supporting SO 2 collection and processing system, otherwise a large amount of SO 2 It will cause serious pollution to the environment and endanger the health of workers

Atmospheric pressure leaching method: Although the traditional atmospheric pressure leaching method has the characteristics of simple equipment and short process flow, the leaching effect is not good and the recovery rate is not high

Bioleaching method: The production cycle of bioleaching method is long and the area is large, so it is not suitable for processing high-grade concentrates