Method for recovering metal from waste lithium battery

A waste lithium battery and metal technology, applied in the direction of improving process efficiency, can solve problems such as environmental pollution, and achieve the effect of simple equipment process and high extraction rate

Inactive Publication Date: 2011-11-23
鞍山鑫普新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the treatment of waste lithium-ion batteries is an extremely complicated process. If the technical level does not meet the treatment requirements, it will often cause greater environmental pollution during the treatment process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Take 95% heat-treated undersieve and 5% flux according to the percentage by weight, melt in the graphite crucible of the vacuum melting furnace, the vacuum degree of the vacuum melting furnace is less than 0.5 Pa, fill nitrogen into the vacuum melting furnace, and control the inflation The pressure is -0.09MPa~-0.03Mpa; 3) The vacuum melting furnace is heated to 1800~2800°C until the material is completely melted; 4) The completely melted material is poured into the casting ladle; 5) Wait until the material temperature is less than 200 ℃, take out the casting ladle, and remove the slag on it to obtain the cobalt-based alloy.

Embodiment 2

[0043] Take 90% heat-treated undersieve, 8% flux, and 2% coke by weight percentage, melt in a tungsten crucible of a vacuum melting furnace, and the vacuum degree of the vacuum melting furnace is <0.5Pa, and fill the vacuum melting furnace with carbon dioxide. Control the inflation pressure at -0.09MPa~-0.03Mpa; 3) Heat the vacuum melting furnace to 1800~2800°C until the material is completely melted; 4) Pour the completely melted material into the casting ladle; 5) Wait to cool down to the material temperature After the temperature is lower than 200°C, take out the casting ladle and remove the slag on it to obtain the cobalt-based alloy.

Embodiment 3

[0045] Take 82% heat-treated undersize, 12% flux, and 6% coke by weight percentage, melt in the graphite crucible of the vacuum melting furnace, and the vacuum degree of the vacuum melting furnace <0.5Pa, fill nitrogen into the vacuum melting furnace, Control the inflation pressure at -0.09MPa~-0.03Mpa; 3) Heat the vacuum melting furnace to 1800~2800°C until the material is completely melted; 4) Pour the completely melted material into the casting ladle; 5) Wait to cool down to the material temperature After the temperature is lower than 200°C, take out the casting ladle and remove the slag on it to obtain the cobalt-based alloy.

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PUM

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Abstract

The invention relates to a method for recovering metal from a waste lithium battery. The method is characterized by comprising the following steps of: discharging, crushing and screening the waste lithium battery; magnetically sorting and separating riddlings; heat-treating and smelting an oversize steel shell and screenings in vacuum respectively; and adding a solvent and cokes when the screenings are smelted, wherein weight percentages of respective components are as follows: 50-97% of screenings, 3-30% of solvent and 0-20% of cokes. Compared with the prior art, the method has the advantages of simplicity in equipment and process, high extraction rate of noble metal and the like, is particularly suitable for hydrogen storage alloy manufacturing factories to recover the metal in lithium batteries, and can be used for extracting an iron and nickel-based alloy and a cobalt-based alloy from the waste lithium battery; acid and organic solvent are not used in the whole recovery process; organic matters and metal-containing materials are effectively separated from each other through a method of physical separation; and smoke pollution and the like caused by burning the organic matters cannot be produced, so that the method is a safe and environment-friendly method for disposing waste batteries.

Description

technical field [0001] The invention relates to a method for recovering metals from waste lithium batteries. Background technique [0002] With the progress of society and science and technology, people's demand for various mobile electronic devices such as mobile phones and notebook computers is increasing day by day. Lithium-ion batteries have many advantages such as high energy density, high output voltage, long cycle life, low self-discharge rate, no memory effect, and can be made into any shape. They have been widely used in various mobile electronic devices. [0003] Waste lithium-ion batteries contain a variety of valuable metal elements such as cobalt, copper, nickel, aluminum, and iron. If they are discarded at will, it will not only cause a serious waste of resources, but also cause pollution to the environment. Recycling waste lithium-ion batteries, extracting the metals and recycling them is the most ideal sustainable development direction. Lithium-ion batterie...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B7/00
CPCY02P10/20
Inventor 王常春郭靖洪姜波沈欣
Owner 鞍山鑫普新材料有限公司
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