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Method for selectively separating valuable metal in cobalt-nickel-copper-iron alloy

A valuable metal, cobalt-nickel-copper technology, applied in the field of metallurgy, can solve the problems of unsuitable industrialized continuous production, difficult to achieve large-scale industrialization, strong corrosiveness of the hydrochloric acid system, etc., to achieve clean high-value utilization and product added value. High, breaking through the resource bottleneck effect

Inactive Publication Date: 2019-06-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of electrochemical dissolution method is low, but the reaction time is long, so it is not suitable for industrial continuous production
The sulfuric acid system oxidative acid dissolution method uses a strong oxidant to leach all the metal elements in the alloy under strong acidic conditions, and then removes impurities and purifies and separates the leaching solution several times. Although this method has a high leaching rate, it has a violent reaction process. The process is long, and the cost of subsequent impurity removal and metal separation is high; the chlorination dissolution method and the mixed acid system dissolution method use chlorine gas or hydrogen peroxide as the oxidant, and alloy powder is leached in the hydrochloric acid system. The leaching efficiency is high, but the hydrochloric acid system is highly corrosive. , high equipment cost, volatile hydrochloric acid, poor production environment, difficult wastewater treatment, and difficult to achieve large-scale industrialization

Method used

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  • Method for selectively separating valuable metal in cobalt-nickel-copper-iron alloy
  • Method for selectively separating valuable metal in cobalt-nickel-copper-iron alloy
  • Method for selectively separating valuable metal in cobalt-nickel-copper-iron alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This embodiment includes the following steps:

[0049] (1) Preparation of alloy powder: Add cobalt-nickel-copper-iron alloy into an electric arc furnace to melt at 1300°C, and then conduct atomization to make powder. The nitrogen pressure used is 0.8MPa, and the particle size of the powder is controlled to be ≤100 mesh to obtain alloy powder; Composition by weight percentage (%): Co 5.86, Ni 6.28, Cu 6.86 and Fe 80.12;

[0050] (2) Potential-controlled selective leaching of alloy powder: Add 500g of the alloy powder obtained in step (1) into the 5L, 3.27mol / L dilute sulfuric acid solution in the leaching tank, and the air flow rate is 0.5L / min to control the leaching process The potential is 200~250mV (SCE), the stirring speed is 500r / min, and 733.6g of hydrogen peroxide with a mass fraction of 25% is added through a constant flow pump, and the reaction temperature is kept at 40~60°C. After leaching for 6 hours, solid-liquid separation is carried out and washed. The co...

Embodiment 2

[0055] This embodiment includes the following steps:

[0056] (1) Preparation of alloy powder: add cobalt-nickel-copper-iron alloy into an electric arc furnace to melt at 1500°C, and then conduct atomization to make powder. The nitrogen pressure used is 1.5MPa, and the particle size of the powder is controlled to be ≤100 mesh to obtain alloy powder;

[0057] The composition of the alloy powder is in weight percent (%): Co 14.68, Ni 16.26, Cu 12.46 and Fe 55.32;

[0058] (2) Potential-controlled selective leaching of alloy powder: Add 500g of the alloy powder obtained in step (1) into the 4L, 2.61mol / L dilute sulfuric acid solution in the leaching tank, and the air flow rate is 2.0L / min to control the leaching process The potential is 280~350mV (SCE), the stirring speed is 1000r / min, and 1106.4g of hydrogen peroxide with a mass fraction of 25% is added through a constant flow pump, and the reaction temperature is kept at 60~70°C. After leaching for 4 hours, solid-liquid separat...

Embodiment 3

[0063] This embodiment includes the following steps:

[0064] (1) Preparation of alloy powder: Add cobalt-nickel-copper-iron alloy into an electric arc furnace to melt at 1600°C, and then conduct atomization to make powder. The nitrogen pressure used is 2.5MPa, and the particle size of the powder is controlled to be ≤100 mesh to obtain alloy powder;

[0065] The composition of the alloy powder is calculated by weight percentage (%): Co 19.39, Ni 24.63, Cu 18.82 and Fe 36.68;

[0066] (2) Potential-controlled selective leaching of alloy powder: Add 500g of the alloy powder obtained in step (1) into the 6L, 1.87mol / L dilute sulfuric acid solution in the leaching tank, and the air flow rate is 0.5L / min to control the leaching process The potential is 350~400mV (SCE), the stirring speed is 1500r / min, and 1834g of hydrogen peroxide with a mass fraction of 25% is added through a constant flow pump, and the reaction temperature is kept at 40~60°C. After leaching for 6 hours, solid-li...

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Abstract

The invention relates to a method for selectively separating valuable metal in a cobalt-nickel-copper-iron alloy. The method for selectively separating the valuable metal in the cobalt-nickel-copper-iron alloy comprises the following steps of melting the cobalt-nickel-copper-iron alloy at the temperature ranging from 1300 DEG C to 1600 DEG C, atomizing for powdering through a high-pressure automation device, and obtaining cobalt-nickel-copper-iron alloy powder; adding the alloy powder into a sulfuric acid system, feeding an oxidizing gas or an oxidizing agent, regulating a gas flow or an oxidizing agent amount, and carrying out controlled electric potential selective leaching so as to obtain a Cu residue and a Co-Ni-Fe mixed leaching agent; further enhanced oxidizing leaching the Cu residue, and purifying to obtain a Cu chemical product; and adding the Co-Ni-Fe mixed leaching agent into a specially designed corrosion leaching tank, and carrying out corrosion separation so as to obtaina rust residue and a cobalt nickel sulfate mixed solution. The preparation method is novel, short in flow and non-pollution in technological process, can be used for extracting an ocean manganese nodule and recycling a lithium battery new energy material, and has a favorable industrialization prospect.

Description

technical field [0001] The invention belongs to the hydrometallurgical process in the field of metallurgy, in particular to a method for selectively separating valuable metals in cobalt-nickel-copper-iron alloys. Background technique [0002] Cobalt and nickel are important strategic reserve metals, widely used in new energy vehicles, aerospace, chemical industry, electronics and other fields. China is a country with relatively poor nickel and cobalt resources, and global cobalt resources are mainly concentrated in Congo (Kinshasa), Australia, Cuba, Zambia and other countries and regions. With the explosive growth of the new energy automobile industry, the demand for cobalt and nickel is also increasing. At present, my country has become the world's largest consumer of nickel and cobalt, but nickel and cobalt mineral resources are increasingly scarce. Comprehensive development and utilization of nickel and cobalt new Resources and secondary resources are an effective way and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B23/00C22B15/00C22B3/44
CPCY02P10/20
Inventor 张佳峰赵早文张宝彭春丽
Owner CENT SOUTH UNIV
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