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Method for recycling lithium in waste lithium battery slags through chloridizing roasting and evaporation

A technology of chlorination roasting and lithium battery, which is applied in the direction of improving process efficiency, can solve the problem of no subsequent treatment of lithium slag, and achieve the effect of low price, simple operation and high purity

Active Publication Date: 2018-04-27
安徽惠宏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for recovering lithium in scrap lithium battery slag through chlorination and roasting gas phase for the problem that the lithium slag formed in the process of pyrometallurgical treatment of lithium batteries has no subsequent treatment

Method used

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  • Method for recycling lithium in waste lithium battery slags through chloridizing roasting and evaporation
  • Method for recycling lithium in waste lithium battery slags through chloridizing roasting and evaporation

Examples

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Embodiment 1

[0028] Example 1: Lithium in scrap lithium battery slag treated by chlorination, roasting, evaporation and recovery by pyrolysis

[0029] (1) Pulverizing: take by weighing 50kg of scrap lithium battery slag, then pulverize the massive lithium slag;

[0030] (2) Mixing: grinding again after mixing the crushed lithium slag with 6kg of calcium chloride;

[0031] (3) Roasting: Roast the mixed powder of lithium slag and calcium chloride in a high-temperature muffle furnace at 1000°C for 90 minutes

Embodiment 2

[0032] Example 2: Lithium in scrap lithium battery slag treated by chlorination roasting evaporation recovery fire method

[0033] (1) Grinding: take by weighing 50kg of scrap lithium battery slag, then pulverize the massive lithium slag;

[0034] (2) mixing: grinding again after mixing the crushed lithium slag with 10kg of calcium chloride;

[0035] (3) Roasting: Roast the mixed powder of lithium slag and calcium chloride in a high-temperature muffle furnace at 1000° C. for 60 minutes to evaporate the lithium in the lithium slag.

Embodiment 3

[0036] Example 3: Lithium in scrap lithium battery slag treated by chlorination, roasting, evaporation and recovery by pyrolysis

[0037] (1) Grinding: take by weighing 50kg of scrap lithium battery slag, then pulverize the massive lithium slag;

[0038] (2) mixing: grinding again after mixing the crushed lithium slag with 10kg of calcium chloride;

[0039] (3) Roasting: The mixed powder of lithium slag and calcium chloride is roasted in a high-temperature muffle furnace at 900° C. for 90 minutes to evaporate the lithium in the lithium slag.

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Abstract

The invention provides a method for recycling lithium in waste lithium battery slags through chloridizing roasting and evaporation and belongs to the field of resource recycling. The method comprisesthe following steps: uniformly mixing pulverized lithium slags with a certain quantity of metal chloride; and then, roasting mixed lithium slag and metal chloride at high temperature, and transferringlithium in the lithium slags into a gas-phase removing system in the form of lithium chloride. The problem that the lithium in the waste lithium batteries is difficult to recycle by thermometallurgytreatment is solved. The molar ratio of chlorine in the metal chloride and the lithium in the lithium slags is 1: 1 to 2:1, and the roasting temperature is 800-1200DEG C. The method is simple to operate, causes small pollution, and is high in economical benefit and suitable for industrial popularization.

Description

technical field [0001] The invention belongs to the field of resource recycling and relates to a method for recovering lithium in waste lithium battery slag through chlorination and roasting gas phase. Background technique [0002] As a portable energy source, lithium batteries are widely used in people's lives, bringing many conveniences to our lives. With the development of electronic products and electric vehicles, discarded lithium batteries are bound to appear in large numbers. Lithium element is irreplaceable as the core element of lithium batteries, and lithium resources in my country are not abundant, so recycling lithium batteries is an inevitable trend. [0003] At present, the recycling methods for waste lithium batteries mainly include pyrometallurgical recycling and hydrometallurgical recycling. The two methods have their own advantages and disadvantages: the hydrometallurgy method can recover most metals, but it has extremely high requirements for the classif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/08C22B26/12
CPCC22B1/08C22B7/002C22B26/12Y02P10/20
Inventor 汪本峰常志东李文军周花蕾孙长艳
Owner 安徽惠宏科技有限公司
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