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A method for recovering valuable metals from waste nickel-zinc batteries

A nickel-zinc battery and valuable metal technology, which is applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of nickel-zinc battery recycling technology that has not been reported yet, large consumption of auxiliary materials, long filtration time, etc. , to achieve the effect of high resource recycling rate, low cost and short process flow

Active Publication Date: 2016-05-25
HUNAN BRUNP RECYCLING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method consumes a lot of auxiliary materials and a large amount of waste water. The secondary waste liquid, copper, manganese, waste water, etc. are not separated and recycled. At the same time, there is a problem of long filtration time when removing calcium, magnesium or sodium sulfide.
Therefore, for waste nickel-zinc batteries, there are certain differences in their composition and waste nickel-cadmium, nickel-metal hydride, lithium-ion and other batteries. It is not advisable to recycle waste nickel-zinc batteries with traditional methods, but at present, how to deal with waste nickel-zinc batteries The recycling technology of nickel-zinc battery has not been reported yet

Method used

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  • A method for recovering valuable metals from waste nickel-zinc batteries
  • A method for recovering valuable metals from waste nickel-zinc batteries
  • A method for recovering valuable metals from waste nickel-zinc batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A method for recovering valuable metals from waste nickel-zinc batteries, the technological process is as follows figure 1 shown, including the following steps:

[0053] (1) Place waste nickel-zinc batteries in saturated salt water for self-discharge treatment;

[0054] (2) Use a crusher to crush and sieve the nickel-zinc battery after self-discharge treatment, and then sieve it with a 120-mesh standard sieve to obtain the oversize and undersize;

[0055] (3) Conduct magnetic separation on the sieve to obtain iron slag and non-magnetic substances;

[0056] (4) Mix the non-magnetic substance and the undersize, then leach the mixture with 206g / L sulfuric acid, and obtain the leachate after filtration; the test results of the mixture and the iron slag after mixing the nonmagnetic substance and the undersize are shown in the table 2; The content of each component in the leachate is shown in Table 3:

[0057] (5) Take 2m 3 leach solution, and then the leach solution is c...

Embodiment 2

[0082] A method for recovering valuable metals from waste nickel-zinc batteries, the technological process is as follows figure 2 shown, including the following steps:

[0083] (1) Place waste nickel-zinc batteries in saturated salt water for self-discharge treatment;

[0084] (2) Use a crusher to crush and sieve the nickel-zinc battery after self-discharge treatment, and then sieve it with a 120-mesh standard sieve to obtain the oversize and undersize;

[0085] (3) Conduct magnetic separation on the sieve to obtain iron slag and non-magnetic substances;

[0086] (4) Mix the non-magnetic substance and the undersize, then leach the mixture with 220g / L sulfuric acid, and obtain the leachate after filtration; the test results of the mixture and the iron slag after mixing the nonmagnetic substance and the undersize are shown in the table 8; The content of each component in the leachate is shown in Table 9:

[0087] (5) The leaching solution is chemically treated and extracted ...

Embodiment 3

[0114] A method for recovering valuable metals from waste nickel-zinc batteries, comprising the following steps:

[0115] (1) Place waste nickel-zinc batteries in saturated salt water for self-discharge treatment;

[0116] (2) Use a crusher to crush and sieve the nickel-zinc battery after self-discharge treatment, and then sieve it with a 120-mesh standard sieve to obtain the oversize and undersize;

[0117] (3) Conduct magnetic separation on the sieve to obtain iron slag and non-magnetic substances;

[0118] (4) Mix the non-magnetic material and the undersize, then leach the mixture with 225g / L sulfuric acid, and obtain the leachate after filtration; the test results of the mixture and the iron slag after mixing the non-magnetic material and the undersize are shown in the table 15; The content of each component in the leachate is shown in Table 16:

[0119] (5) The leaching solution is chemically treated and extracted to obtain a binary mixture of nickel sulfate and cobalt ...

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Abstract

The invention discloses a method for recovering valuable metal from a waste nickel-zinc battery. The method comprises the following steps: arranging the waste nickel-zinc battery into saturated salt water, and carrying out self-discharge treatment; crushing and screening the nickel-zinc battery subjected to self-discharging treatment to obtain oversize products and undersize products; carrying out magnetic separation on the oversize products to obtain iron residues and nonmagnetic substances; mixing the nonmagnetic substances with the undersize products, then leaching the mixture by sulfuric acid, and filtering to obtain leachate; treating the leachate by a chemical method, carrying out extraction separation to obtain binary mixed liquid of nickel sulfate and cobalt sulfate, zinc salt solution and calcium chloride solution, or binary mixed liquid of nickel sulfate and cobalt sulfate, zinc salt solution, copper salt solution and calcium chloride solution; respectively concentrating and crystallizing the obtained solution, and carrying out centrifugal separation the solution to complete the recovery of the valuable metal. According to the method, secondary pollution to the environment is avoided, the technological process is short, the resource recovery and utilization rate is high, the technical product selection flexibility is high, the cost is low and economical benefits are relatively high.

Description

technical field [0001] The invention belongs to the fields of hydrometallurgy and comprehensive utilization of waste resources, and in particular relates to a method for recovering valuable metals from waste nickel-zinc batteries. Background technique [0002] In this era of portable devices, with the rapid development of technology, people's demand for batteries and the improvement of their quality are increasing day by day. It has been hundreds of years since Thomas Edison studied nickel-zinc batteries. Nickel-zinc batteries have the advantages of high specific energy, safety and reliability, high output power, wide operating temperature range, no problem with the source of raw materials, low cost, and no mercury and cadmium pollution. It has become a promising high-energy battery at present. , Mopeds, electric motorcycles, electric vehicles and hybrid electric vehicles, etc., the practical value is very ideal. Compared to lead-acid batteries, nickel-zinc batteries are s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C22B7/00C22B23/00C22B19/30C22B26/20C22B15/00
CPCC22B7/00C22B15/00C22B19/30C22B23/00C22B26/20H01M10/54Y02P10/20Y02W30/84
Inventor 刘勇奇谭群英唐红辉王皓王致富
Owner HUNAN BRUNP RECYCLING TECH
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