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Waste battery combined regeneration treatment method

A treatment method and technology of waste batteries, which are applied in battery recycling, regeneration of useful parts, recycling of waste collectors, etc., can solve the problems of poor economic benefits, inability to industrialize, and high processing costs, and achieve the effect of expanding the range and saving oxidants

Pending Publication Date: 2021-04-16
深圳市泰力废旧电池回收技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the deficiencies of the above-mentioned prior art, the main purpose of the present invention is to provide a joint regeneration treatment of waste lithium iron phosphate batteries and waste batteries (specifically including zinc-manganese batteries, lithium-manganese dioxide batteries) in the compulsory classification of domestic waste The method aims to solve the existing problems of high cost, poor economic benefits, and non-industrialization of these waste batteries, improve resource utilization, reduce environmental pressure, and provide more industrialized processing methods for the compulsory classification of domestic waste

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Embodiment 1

[0062] A combined regeneration treatment method for waste batteries, comprising the following steps:

[0063] 1. The recovered zinc-manganese battery is pretreated to obtain the first potassium-containing lye, the zinc-containing solution and the first manganese source, and the recovered lithium-manganese dioxide battery is pre-treated to obtain the lithium-containing solution and the second manganese source, The recovered lithium iron phosphate battery is pretreated to obtain lithium iron phosphate battery powder; at the same time, the first fluorine-containing waste gas generated in the pretreatment of the lithium-manganese dioxide battery and the second fluorine-containing waste gas generated in the pretreatment of the lithium iron phosphate battery are After collection, secondary combustion is carried out to generate the first waste gas. The first waste gas is sprayed with the first potassium-containing alkali solution obtained after pretreatment with zinc-manganese batteri...

Embodiment 2

[0072] A combined regeneration treatment method for waste batteries, the difference from Example 1 is that the first manganese source and the second manganese source are used, wherein the content of trivalent manganese in the first manganese source is 2mol, and the content of tetravalent manganese is 4mol , the content of trivalent manganese in the second manganese source is 3 mol, the content of tetravalent manganese is 4 mol, mixed with lithium iron phosphate battery powder containing 26 mol of lithium iron phosphate, added water and stirred to obtain a mixed slurry. Slowly add 28 mol of sulfuric acid solution into the mixed slurry, and stir and react at 80° C. for 8 hours.

[0073] In the present embodiment, the quality of reclaimed manganese sulfate is 2145g, and the purity meets the first-class product index of HG / T 4823-2015; the quality of lithium carbonate is 768g, and the purity meets the requirements of YS / T 582-2013; the quality of metal zinc is 195g, The purity mee...

Embodiment 3

[0075] A combined regeneration treatment method for waste batteries, the difference from Example 1 is that the first manganese source and the second manganese source are used, wherein the content of trivalent manganese in the first manganese source is 2mol, and the content of tetravalent manganese is 1mol , the content of trivalent manganese in the second manganese source is 2mol, and the content of tetravalent manganese is 2mol, mixed with lithium iron phosphate battery powder containing 10.8mol of lithium iron phosphate to obtain mixed waste. Add 15 mol of sulfuric acid solution to the mixed waste, acidify and roast, react at 200° C. for 2 hours, add water and mix to obtain mixed slurry.

[0076] In the present embodiment, the quality of manganese sulfate recovered is 1142g, and the purity meets the first-class product index of HG / T 4823-2015; the quality of lithium carbonate is 378g, and the purity meets the requirements of YS / T 582-2013; the quality of metal zinc is 98g, T...

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Abstract

The invention discloses a waste battery combined regeneration treatment method which comprises the following steps: mixing a first manganese source obtained by pretreating a zinc-manganese battery, a second manganese source obtained by pretreating a lithium-manganese dioxide battery and lithium iron phosphate battery powder obtained by pretreating a lithium iron phosphate battery to obtain mixed waste, and adding an inorganic acid solution into the mixed waste, carrying out acidification roasting or acid leaching treatment, then, pre-treating the mixed slurry and a lithium manganese dioxide battery to obtain a lithium-containing solution, mixing, adjusting the pH value of the mixed slurry, and carrying out phosphorus removal treatment to obtain an iron phosphate slag and lithium manganese mixed salt solution; and extracting and separating the lithium-manganese mixed salt solution to obtain a manganese salt solution and a lithium salt solution. Compared with the prior art, the method has the advantages that the reducibility of lithium iron phosphate and the oxidability of a manganese source are fully utilized, redox reaction is carried out in an acid environment, a reducing agent and an oxidizing agent required for recycling can be saved, and the regeneration cost of the waste battery is reduced.

Description

technical field [0001] The invention relates to the technical field of waste battery recovery and treatment, in particular to a combined regeneration treatment method for waste lithium iron phosphate batteries and waste batteries in compulsory classification of domestic waste. Background technique [0002] At present, there are roughly two types of waste battery treatment methods in the world: (1) Solidification and deep burial. This treatment method is not only expensive, but also has hidden dangers of pollution, and is easy to cause waste. After all, there are still many waste batteries that can be used as raw materials. (2) Recycling, the harmless treatment and recycling of waste batteries is of great significance to protecting the environment and saving resources, and is the preferred way to dispose of waste batteries. [0003] From a technical point of view, any kind of waste battery recycling can be realized, but the current commercialized waste battery recycling proje...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M6/52C22B26/12C22B47/00C22B7/00C22B19/20
CPCY02W30/84Y02P10/20
Inventor 赖辛宇谭静进张永祥
Owner 深圳市泰力废旧电池回收技术有限公司
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