Harmless treatment method and system of lithium metal waste residue

A technology of harmless treatment and metal lithium, applied in the direction of improving process efficiency, can solve the problems of high equipment requirements, polychloride, long process, etc., and achieve the effect of good safety performance, less time-consuming processing, and rapid process.

Active Publication Date: 2019-02-19
天齐锂业(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium metal recovery by smelting requires the addition of more chloride, higher cost, longer process and higher equipment requirements

Method used

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  • Harmless treatment method and system of lithium metal waste residue
  • Harmless treatment method and system of lithium metal waste residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] The harmless treatment method of metal lithium waste residue in the present embodiment specifically comprises the following steps:

[0103] 1. Take 1000g lithium metal waste residue in a high-purity argon protective atmosphere, and put it into a waste residue heating container;

[0104] 2. Install a filter screen with a pore size of 50 μm on the upper cover with a protective gas pipeline and a lithium outlet pipeline, and lower the upper cover through a hydraulic lifting rod to seal the waste residue heating container;

[0105] 3. Turn on the gas control unit, discharge the waste residue through the protective gas pipeline on the upper cover, heat the inner atmosphere of the container to a vacuum of 0.09MPa and fill it with high-purity argon to normal pressure, stop after 3 cycles;

[0106] 4. Turn off the gas control unit, turn on the temperature control system, and heat the waste slag heating container, working gas heating container, working gas pipeline and lithium o...

Embodiment 2

[0114] The harmless treatment method of metal lithium waste residue in the present embodiment specifically comprises the following steps:

[0115] 1. Take 1000g lithium metal waste residue in a high-purity argon protective atmosphere, and put it into a waste residue heating container;

[0116] 2. Install a filter screen with a pore size of 1000 μm on the upper cover with a protective gas pipeline and a lithium outlet pipeline, and lower the upper cover through a hydraulic lifting rod to seal the waste residue heating container;

[0117] 3. Turn on the gas control unit, discharge the waste residue through the protective gas pipeline on the upper cover, heat the inner atmosphere of the container to a vacuum of 0.09MPa and fill it with high-purity argon to normal pressure, stop after 3 cycles;

[0118] 4. Turn off the gas control unit, turn on the temperature control system, and heat the waste slag heating container, working gas heating container, working gas pipeline and lithium...

Embodiment 3

[0126] The harmless treatment method of metal lithium waste residue in the present embodiment specifically comprises the following steps:

[0127] 1. Take 1000g lithium metal waste residue in a high-purity argon protective atmosphere, and put it into a waste residue heating container;

[0128] 2. Install a filter screen with a pore size of 5 μm on the upper cover with a protective gas pipeline and a lithium outlet pipeline, and lower the upper cover through a hydraulic lifting rod to seal the waste slag heating container;

[0129] 3. Turn on the gas control unit, discharge the waste residue through the protective gas pipeline on the upper cover, heat the inner atmosphere of the container to a vacuum of 0.09MPa and fill it with high-purity argon to normal pressure, stop after 3 cycles;

[0130] 4. Turn off the gas control unit, turn on the temperature control system, and heat the waste slag heating container, working gas heating container, working gas pipeline and lithium outle...

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Abstract

The invention discloses a harmless treatment method and system of lithium metal waste residue. The harmless treatment method of the lithium metal waste residue comprises the following steps: putting the lithium metal waste residue in a sealed heating chamber and completely replacing gas in the heating chamber with protective gas which does not react with lithium; heating the lithium metal waste residue to a first temperature, disturbing the lithium metal waste residue, and vacuumizing the heating chamber in order to achieve oil removal treatment; after finishing the oil removal treatment, heating the lithium metal waste residue to a second temperature and disturbing the lithium metal waste residue in order to cause the lithium metal to melt and aggregate into lithium metal liquid and layerthe lithium metal liquid with solid impurities; and enabling the lithium metal liquid to flow out from the heating chamber after passing through a filter net placed in the heating chamber in order tointercept the solid impurities by the filter net. The harmless treatment method has no chemical reaction and no contact with air during treating the lithium metal waste residue, eliminates potentialsafety hazards, can directly, rapidly and effectively recover the lithium metal from the lithium metal waste residue, and has simple process and high economic benefit.

Description

technical field [0001] The invention relates to a method for harmless treatment of metal lithium waste residue, in particular to a rapid and effective method and system for harmless treatment of metal lithium waste residue, in which metal lithium is recovered, belonging to the technical field of lithium recovery. Background technique [0002] Lithium metal was first discovered in a rare rock in 1817 by the Swedish chemist Alfvitsan. The element symbol of metallic lithium is Li, which is a silver-white metal with a relative atomic mass of 6.941 and a density of 0.534g / cm 3 , is the lightest metal with a melting point of 180.54°C and a boiling point of 1317°C. Lithium metal has strong reducibility, can react with a large number of inorganic reagents and organic reagents, and can combine with oxygen, nitrogen, sulfur, etc. It is the only one that reacts with nitrogen at room temperature to form lithium nitride (Li 3 N) alkali metals. It is easy to react with oxygen when exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/12
CPCC22B7/001C22B26/12Y02P10/20
Inventor 钟兆资曹乃珍陈欣刘强邹崴
Owner 天齐锂业(江苏)有限公司
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