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Production method for realizing nickel-cobalt separation by utilizing ozone under mixed acid system

A production method and ozone technology, applied in the direction of improving process efficiency, can solve the problems of long reaction time, many reaction tanks, large processing capacity, etc., and achieve low entrainment of valuable metal nickel, reduction of processing costs, and entrainment of nickel. small amount of effect

Active Publication Date: 2021-10-19
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the long-term industrial production of this process, the main problems are that the reaction time is long, the required reaction tanks are many, the equipment investment is large, and the amount of cobalt slag is large. The ratio of black cobalt slag to nickel and cobalt is about 3.5 to 4:1. Large processing volume and high processing cost

Method used

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  • Production method for realizing nickel-cobalt separation by utilizing ozone under mixed acid system
  • Production method for realizing nickel-cobalt separation by utilizing ozone under mixed acid system
  • Production method for realizing nickel-cobalt separation by utilizing ozone under mixed acid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Table 1: Nickel-cobalt mixed acid solution composition (g / L) used in embodiment 1

[0025]

[0026] The specific implementation process: take a certain amount of sulfuric acid and hydrochloric acid mixed nickel-cobalt solution, pH=4.8, after the electric heating plate is heated to 60°C, turn on the stirring speed of 400r / min, adjust the ozone concentration to 50mg / L, the process is controlled by adding nickel carbonate The pH of the reaction slurry is 4.8, and the aeration reaction time is 60 minutes. After the aeration is completed, compressed air is blown in for 5 minutes, and the reaction solution is filtered to obtain nickel mixed acid solution and black cobalt slag. Table 2 shows the ratio of nickel and cobalt in the liquid, black cobalt slag and liquid meter cobalt removal rate after cobalt removal.

[0027] Table 2: Example 1 Nickel-Cobalt Separation and Analysis Results

[0028]

Embodiment 2

[0030] Table 3: Nickel-cobalt mixed acid solution composition (g / L) used in embodiment 2

[0031]

[0032] The specific implementation process: Take a certain amount of sulfuric acid and hydrochloric acid mixed with nickel-cobalt solution, pH=4.5, after the electric heating plate is heated to 55°C, turn on the stirring speed of 400r / min, adjust the ozone concentration to 150mg / L, the process is controlled by adding nickel carbonate The pH of the reaction slurry is 4.5, and the aeration reaction time is 50 minutes. After the aeration is completed, compressed air is blown in for 5 minutes, and the reaction liquid is filtered to obtain nickel mixed acid solution and black cobalt slag. After cobalt removal, the ratio of nickel to cobalt in the liquid, black cobalt slag and the cobalt removal rate in liquid meter are shown in Table 4.

[0033] Table 4: Example 2 Nickel-Cobalt Separation and Analysis Results

[0034]

Embodiment 3

[0036] Table 5: Nickel-cobalt mixed acid solution composition (g / L) used in embodiment 3

[0037]

[0038] Take a certain amount of nickel-cobalt solution mixed with sulfuric acid and hydrochloric acid, pH=5.0, heat up the electric heating plate to 45°C, turn on the stirring speed at 400r / min, adjust the ozone concentration to 110mg / L, and control the pH of the reaction slurry by adding nickel carbonate to 5.0, the ventilation reaction time is 60 minutes, and the compressed air is blown in for 5 minutes after the ventilation is completed, and the liquid after the reaction is filtered to obtain the mixed acid solution of nickel and black cobalt slag. After cobalt removal, the ratio of nickel to cobalt in the liquid, black cobalt slag and the cobalt removal rate of the liquid meter are shown in Table 6.

[0039] Table 6: Example 3 Nickel-Cobalt Separation and Analysis Results

[0040]

[0041] Based on the above three embodiments, it can be seen that the ratio of nickel t...

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Abstract

The invention discloses a production method for realizing nickel-cobalt separation by utilizing ozone under a mixed acid system. The production method for realizing nickel-cobalt separation by utilizing the ozone under the mixed acid system comprises the following steps that a pH value is adjusted to 4.0-5.0, a solution is heated to 45-65 DEG C, stirring is started, ozone gas with the concentration of 50-180 mg / L is introduced into the solution, nickel carbonate is added simultaneously and continuously to control the pH value of a reaction system to 4.0-5.0, the temperature of the solution is kept to be 45-65 DEG C; the flow of the ozone is adjusted to control the oxidation-reduction potential of the reaction system to be 1000-1080 mV, the ozone introduction time is 40-60 min, a nickel-cobalt separation reaction is carried out, Co < 2 + > ions in a mixed solution are oxidized into Co < 3 + > ions by the ozone, and Co (OH) 3 precipitates are formed. The ozone is used as an oxidizing agent, the nickel carbonate is used as a neutralizing agent, and no new zwitterions are introduced into a system in the whole process; the ozone has strong oxidizability, and can quickly and effectively realize deep separation of nickel and cobalt.

Description

technical field [0001] The invention belongs to the technical field of nickel-cobalt hydrometallurgy, and in particular relates to a production method for realizing the separation of nickel and cobalt by utilizing ozone in a mixed acid system. Background technique [0002] The separation of nickel and cobalt is a key step in the process of nickel hydrometallurgy. The commonly used technologies include zinc powder replacement method, xanthate cobalt removal method, extraction separation method, oxidation precipitation method, etc. These methods are suitable for different specific production situations. The oxidation precipitation method is a simple and easy-to-operate cobalt removal method. Commonly used oxidants include perchloric acid, chlorine gas, hypochlorous acid, potassium permanganate, etc., but the addition of these oxidants will introduce new impurities, which is not conducive to subsequent treatment. craft. [0003] In the traditional hydrometallurgical process, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B3/44
CPCC22B23/0484C22B23/0461Y02P10/20
Inventor 张建玲张晗李维舟刘广龙马旻锐王书友郭金权马俊李燕梅马天飞
Owner JINCHUAN GROUP LIMITED
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