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Method for comprehensively recovering copper and cobalt from copper cobalt oxide ore

A technology for copper oxide and copper recovery, which is applied in the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of low cobalt recovery rate, affecting sedimentation and extraction, and large consumption of chemicals.

Pending Publication Date: 2021-09-14
ZIJIN MINING GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both sulfuric acid leaching and pressurized ammonia leaching have been implemented industrially, but most cobalt production enterprises use the traditional acid leaching process, which takes a long time, mature process conditions, and simple operation. Leaching affects the subsequent settlement and extraction, and the acid leaching is not friendly to the environment, the cobalt recovery and impurity removal process is complicated, the cobalt recovery rate is low, the consumption of chemicals is large, and the cost is high; although ammonia can be recycled under pressure ammonia leaching, the investment and actual production costs are higher

Method used

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  • Method for comprehensively recovering copper and cobalt from copper cobalt oxide ore
  • Method for comprehensively recovering copper and cobalt from copper cobalt oxide ore
  • Method for comprehensively recovering copper and cobalt from copper cobalt oxide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, a copper-cobalt oxide mine in China was used, and the analysis results of the main elements are shown in Table 1.

[0034] Table 1 Analysis results of main elements of a copper-cobalt oxide ore in China

[0035]

[0036] This embodiment provides a method for the comprehensive recovery of copper and cobalt from copper oxide cobalt ore, and the above-mentioned copper oxide cobalt ore is processed, such as figure 1 As shown, the specific process is as follows:

[0037] S1. Slurry: finely grind the copper-cobalt oxide ore to a particle size of -74 μm and account for 70%, then add it to the slurry tank, and process industrial water into the slurry tank to adjust the copper-cobalt oxide ore to the pulp mass percentage concentration Add concentrated sulfuric acid to adjust the pH value of the pulp to 1.0. At this time, the concentrated sulfuric acid exothermicly heats the pulp to 80°C, and finally adds chalcocite to adjust the oxidation-reduction potential...

Embodiment 2

[0047] In this example, a copper-cobalt oxide ore in the Democratic Republic of the Congo was used, and the analysis results of the main elements are shown in Table 2.

[0048] Table 2 Analysis results of main elements of a copper-cobalt oxide ore in Congo (Kinshasa)

[0049]

[0050] In this embodiment, a method for comprehensively recovering copper and cobalt from copper-cobalt oxide ore is used to process the above-mentioned copper-cobalt oxide ore, such as figure 1 As shown, the specific process is as follows:

[0051] S1. Slurry: finely grind the above-mentioned copper-cobalt oxide ore until the particle size is -74μm, accounting for 75%, and then add it to the slurry tank, and adjust the copper-cobalt oxide ore to the mass percentage of the slurry by processing industrial water into the slurry tank The concentration is 55%, add concentrated sulfuric acid to adjust the pH value of the pulp to 1.2, at this time, the concentrated sulfuric acid exothermicly heats the pul...

Embodiment 3

[0061] In this example, a copper-cobalt oxide ore in Zambia was used, and the analysis results of the main elements are shown in Table 3.

[0062] Table 3 Analysis results of main elements of a copper-cobalt oxide ore in Zambia

[0063]

[0064] The present invention provides a kind of method of copper and cobalt comprehensive recovery copper and cobalt oxide ore, above-mentioned copper oxide cobalt ore is processed, such as figure 1 As shown, the specific process is as follows:

[0065] S1. Pulp mixing: finely grind the above-mentioned copper-cobalt oxide ore until the particle size is -74 μm, accounting for 80%, and then add it to the slurry mixing tank, and adjust the copper-cobalt oxide ore to the mass percentage of the slurry by processing industrial water into the slurry mixing tank The concentration is 55%, add concentrated sulfuric acid to adjust the pH value of the pulp to 1.5, at this time, the concentrated sulfuric acid exothermicly heats the pulp to 65°C, and f...

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Abstract

The invention discloses a method for comprehensively recovering copper and cobalt from copper cobalt oxide ore. The method comprises the steps of size mixing, leaching, concentration thickening and washing, copper recovery, cobalt recovery from low-copper raffinate and the like. According to the method, under the conditions that the ore pulp concentration is high and the temperature of the ore pulp is increased to 60-85 DEG C through heat release of concentrated sulfuric acid, sulfide minerals and the copper sulfide slag obtained by treating the copper-containing solution through a sulfide precipitation method are adopted, and smelting soot obtained after the sulfide minerals are not completely oxidized replaces sodium pyrosulfite or sodium sulfite to serve as a cobalt leaching reducing agent; on one hand, the cost of the reducing agent is greatly reduced, and on the other hand, environmental unfriendliness caused by SO2 generated when sodium pyrosulfite or sodium sulfite is adopted as the cobalt leaching reducing agent in an acid environment is avoided. More importantly, under the conditions of high ore pulp concentration and high-temperature leaching, the leaching rate of copper and cobalt is increased, the leaching rate of harmful impurity silicon is greatly reduced, and the adverse effects of generation of silica gel on the subsequent procedures of sedimentation, extraction and the like are reduced.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a method for comprehensively recovering copper and cobalt from copper oxide cobalt ore. Background technique [0002] The extraction process of copper-cobalt oxide ore can generally be divided into two types: pyrometallurgy process and wet process. Pyrometallurgy is represented by electric furnace reduction smelting process to produce blister copper or copper-cobalt alloy. The conventional principle process of wet process is "leaching-purification -precipitation". With the development of science and technology, cobalt extraction technology at home and abroad has made new progress, including sulfuric acid pressure leaching, solvent extraction and bioleaching technology. At present, sulfuric acid leaching, pressurized ammonia leaching, and biotechnology can realize the recovery and utilization of copper and cobalt in copper oxide cobalt ore. Both sulfuric acid leachin...

Claims

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Application Information

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IPC IPC(8): C22B15/00C22B23/00C22B3/08C22B3/44C22B3/26C25C1/12
CPCC22B15/0071C22B15/0084C22B23/0461C22B3/08C22B3/44C25C1/12Y02P10/20
Inventor 张兴勋康锦程谢洪珍阙朝阳龙翼谭希发张日富
Owner ZIJIN MINING GROUP
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