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Method for nickel and cobalt leaching from alloy waste

A waste and alloy technology, which is applied in the leaching of nickel and cobalt metal, and the field of leaching nickel and cobalt from alloy waste, can solve the problems of high energy consumption, high requirements for atomization powder making equipment, and high cost

Inactive Publication Date: 2017-09-08
XIAN RAREALLOYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are very few studies on the leaching of nickel and cobalt from alloy waste, and the reported leaching techniques are almost all "atomization pulverization-leaching" technology. This method has disadvantages such as high equipment requirements for atomization pulverization, high energy consumption, and high cost.

Method used

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  • Method for nickel and cobalt leaching from alloy waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This embodiment includes the following steps:

[0018] ⑴Put 300Kg of irregularly shaped massive alloy waste into the anode titanium basket, then add 1000L of sulfuric acid solution (x) with a concentration of 1mol / L into the electrolysis tank as the electrolysis solution, and turn on the DC power supply for electrolysis. When the concentration of nickel ions in the solution reaches 50g / L, the electrolysis is stopped to obtain a mixture of anode slime and electrolytic solution.

[0019] (2) After electrolysis, plate and frame filter to obtain anode slime (b) as the raw material for atmospheric acid leaching in the next step, and Ni and Co enrichment solution (a) as raw material for Ni and Co recovery.

[0020] (3) Using anode slime (b) as raw material, using sulfuric acid solution (y) with a concentration of 1mol / L as leaching agent, at the liquid-solid ratio (i.e. the ratio of the volume of acid solution (y) to the mass of anode slime (b)) Atmospheric pressure acid lea...

Embodiment 2

[0023] This embodiment includes the following steps:

[0024] ⑴Put 300Kg of irregularly shaped bulk alloy waste into the anode titanium basket, then add 1000L sulfuric acid solution (x) with a concentration of 1.5mol / L into the electrolysis tank as the electrolysis solution, and turn on the DC power supply for electrolysis. When the concentration of nickel ions in the electrolytic solution reaches 70g / L, the electrolysis is stopped to obtain a mixture of anode slime and electrolytic solution.

[0025] (2) After the electrolysis is finished, settle and filter to obtain the anode slime (b) as the raw material for the next step of atmospheric acid leaching, and the Ni and Co enrichment solution (a) as the raw material for recovering Ni and Co.

[0026] (3) Using the anode slime (b) as the raw material, using the hydrochloric acid solution (y) with a concentration of 3mol / L as the leaching agent, at the liquid-solid ratio (i.e. the ratio of the volume of the acid solution (y) to t...

Embodiment 3

[0029] This embodiment includes the following steps:

[0030] ⑴Put 300Kg of irregularly shaped massive alloy waste into the anode titanium basket, then add 1000L sulfuric acid solution (x) with a concentration of 0.8mol / L into the electrolysis tank as the electrolysis solution, and turn on the DC power supply for electrolysis. When the concentration of nickel ions in the electrolytic solution reaches 85g / L, the electrolysis is stopped to obtain a mixture of anode slime and electrolytic solution.

[0031] (2) After the electrolysis, settle and filter to obtain the anode slime (b) as the raw material for the next step of atmospheric acid leaching, and the Ni and Co enrichment solution (a) as the raw material for recovering Ni and Co.

[0032] (3) Using the anode slime (b) as the raw material, using the sulfuric acid solution (y) with a concentration of 2mol / L as the leaching agent, the liquid-solid ratio (i.e. the ratio of the volume of the acid solution (y) to the mass of the a...

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Abstract

The invention discloses a method for nickel and cobalt leaching from alloy waste. Firstly, the block-shaped alloy waste containing nickel and cobalt is loaded into an electric dissolving tank to be subjected to electric dissolving; after nickel ions in an electric solution reach a suitable concentration, anode mud in the electric dissolving tank and a solid-liquid mixture formed by the electric solution are subjected to solid-liquid separation; a nickel and cobalt enrichment solution is obtained and used for nickel and cobalt recovery; and 80% or more of the nickel and cobalt can be shifted into the electric solution through electric dissolving. The anode mud is subjected to constant-pressured acid leaching so that the remaining nickel and cobalt can be completely leached; a leaching solution after preparation can serve as an electric solution of electric dissolving of the next time; and filter residues serve as a raw material for recovering rare metals, and the contents of the nickel and the cobalt in the filter residues are both smaller than 0.5% (by mass). Compared with a traditional method, namely an alloy block is subjected to powder atomization firstly and then acid leaching, the method for nickel and cobalt leaching from the alloy waste has the characteristics that the technique is simple, cost is small, the equipment demand is low, the operating temperature is low, acid consumption is low, and zero pollution is achieved, and the method for nickel and cobalt leaching from the alloy waste is high in efficiency, low in cost and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of nonferrous metallurgy and relates to a method for leaching metallic nickel and cobalt, in particular to a method for leaching nickel and cobalt from alloy waste. Background technique [0002] Nickel and cobalt are important strategic reserve metals, widely used in aviation, military industry, chemical industry, electronics, etc. my country is a country deficient in nickel and cobalt. More than 95% of the world's cobalt resources are concentrated in Congo (Kinshasa), Australia, Cuba, Zambia, New Caledonia, Russia and Canada. With the rapid economic development and the continuous development of high technology, the application range of nickel and cobalt in modern industry is constantly expanding, and the demand is constantly increasing. [0003] 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 util...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B34/36C22B34/24C22B34/14C22B61/00
CPCC22B7/007C22B23/0423C22B23/043C22B23/0438C22B34/14C22B34/24C22B34/36C22B61/00Y02P10/20
Inventor 王靖坤王治钧许万祥
Owner XIAN RAREALLOYS