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Harmless treatment method and harmless treatment system for metal lithium waste residue

A technology of harmless treatment and treatment system, which is applied in the harmless treatment of metal lithium waste residues, and in the field of rapid and effective harmless treatment of metal lithium waste residues, can solve the problem of unavoidable lithium slag ignition, etc., to ensure the reaction rate. , the effect of improving processing efficiency

Pending Publication Date: 2019-01-22
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

Although this device can reduce the risk of fire during lithium slag hydrolysis, it cannot avoid the risk of fire during lithium slag treatment

Method used

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  • Harmless treatment method and harmless treatment system for metal lithium waste residue

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The harmless treatment method of metal lithium waste residue in the present embodiment specifically comprises the following steps:

[0075] 1. Add white oil and water into the closed reaction vessel, turn on the vacuum pump to maintain a negative pressure of about 0.09MPa in the vessel, and turn on the circulating cooling device on the outer wall of the closed reaction vessel.

[0076] 2. Add metal lithium waste slag from the side of the closed reaction vessel, the metal lithium waste slag will fall on the surface of the white oil first, and will not react immediately.

[0077] 3. Turn on the screen controller, let the screen move down, and sink the lithium metal waste floating on the surface of the white oil to the bottom of the water.

[0078] 4. After the lithium metal waste slag sinks into the bottom of the water, it reacts with water, and the hydrogen gas produced is pumped out by the vacuum pump and discharged into the hydrogen gas treatment system.

[0079] 5. A...

Embodiment 2

[0082] 1. Add white oil and water into the closed reaction vessel, turn on the vacuum pump to maintain a negative pressure of about 0.08MPa in the vessel, and turn on the circulating cooling device on the outer wall of the closed reaction vessel.

[0083] 2. Add metal lithium waste slag from the side of the closed reaction vessel, the metal lithium waste slag will fall on the surface of the white oil first, and will not react immediately.

[0084] 3. Turn on the screen controller, let the screen move down, and sink the lithium metal waste floating on the surface of the white oil to the bottom of the water.

[0085] 4. After the metal lithium waste slag sinks to the bottom of the water, it reacts with water, and the hydrogen gas produced is pumped out by the vacuum pump and discharged into the hydrogen gas treatment system.

[0086] 5. After the negative pressure in the airtight reaction vessel is re-stabilized to a negative pressure of 0.08MPa, repeat the above operation. Aft...

Embodiment 3

[0089] 1. Add white oil and water into the closed reaction vessel, turn on the vacuum pump to maintain a negative pressure of about 0.085MPa in the vessel, and turn on the circulating cooling device on the outer wall of the closed reaction vessel.

[0090] 2. Add metal lithium waste slag from the side of the closed reaction vessel, the metal lithium waste slag will fall on the surface of the white oil first, and will not react immediately.

[0091] 3. Turn on the screen controller, let the screen move down, and sink the lithium metal waste floating on the surface of the white oil to the bottom of the water.

[0092] 4. After the metal lithium waste slag sinks to the bottom of the water, it reacts with water, and the hydrogen gas produced is pumped out by the vacuum pump and discharged into the hydrogen gas treatment system.

[0093] 5. After the negative pressure in the closed reaction vessel is stabilized to a negative pressure of 0.085MPa, repeat the above operation. After ...

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Abstract

The invention discloses a harmless treatment method and a harmless treatment system for metal lithium waste residue. The method comprises: providing a liquid phase system, wherein the liquid phase system comprises an oil phase and an aqueous phase, the oil phase and the aqueous phase are layered, and the oil phase is distributed above the aqueous phase, and does not react with metal lithium wasteresidue; adding the metal lithium waste residue to the liquid phase system, and distributing metal lithium waste residue in the oil phase; and pressing the metal lithium waste residue into the aqueousphase, and making the metal lithium react with water while continuously removing the hydrogen generated by the reaction so as to achieve the harmless treatment of the metal lithium waste residue. According to the present invention, the whole reaction of the harmless treatment method is performed on the bottom of the water, such that oxygen can be isolated, the reaction rate of metal lithium and water can be ensured, the treatment efficiency can be improved, and the demands of industrial production can be ensured; and the method is safe and controllable, and cannot cause lithium residue firingand explosion.

Description

technical field [0001] The invention relates to a harmless treatment method for metal lithium waste residue, in particular to a rapid and effective harmless treatment method and system for metal lithium waste residue, belonging to the technical field of lithium recovery. Background technique [0002] The oil refining stage in the lithium metal manufacturing process will produce a large amount of lithium-containing waste residue, whose mass is about 3% of the lithium metal output, and the main components include metal lithium, potassium, sodium and their oxides, nitrides, and carbides. Lithium metal waste residue is usually soaked in white oil. After being pulled out from the white oil, the surface will be evenly covered with a layer of oil film. This layer of oil film prevents direct contact between metal lithium and water, oxygen and nitrogen in the air. The role of protecting lithium metal waste slag. After the metal lithium waste residue is recycled and loaded into barre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00
Inventor 陈欣曹乃珍邹崴刘强钟兆资
Owner 天齐锂业(江苏)有限公司
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