Harmless treatment method for metal lithium

A harmless treatment, metal lithium technology, applied in the direction of lithium carbonate;/acid carbonate, can solve the problems of slow reaction speed, difficult control, high time cost, slow down the reaction process and high process efficiency , the effect of improving safety

Pending Publication Date: 2019-11-12
SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 3. High-temperature combustion to process lithium metal waste residue and recover metal lithium, which is likely to cause metal lithium to burn together, which is very difficult to control and has a high risk factor
Although this reaction does not use water, the reaction efficiency of the gas-solid reaction is low. Although the safety is good, the reaction speed is too slow, resulting in high time cost.

Method used

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  • Harmless treatment method for metal lithium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The present embodiment carries out the detoxification treatment of metal lithium according to the following method:

[0067] (1) In a closed processing box, under an argon atmosphere, react with atomized water and lithium metal, the initial flow rate of the atomized water is 50mL / s, and the controlled reaction temperature range is 40-85°C. When the temperature is higher than 85°C, reduce the flow rate of atomized water. When the reaction temperature is lower than 40°C, increase the flow rate of atomized water. The flow rate of atomized water ranges from 10-100mL / s, and the reaction humidity is 10-100% , during the reaction, continue to use the exhaust valve of the treatment box to remove the hydrogen generated by the reaction, after the reaction (that is, the reaction is basically stopped, and the temperature tends to be stable) to obtain a lithium-containing mixture;

[0068] Wherein, the droplet size of the atomized water is about 1.5mm. The exhaust valve of the trea...

Embodiment 2

[0075] The present embodiment carries out the detoxification treatment of metal lithium according to the following method:

[0076] (1) In a non-fully enclosed treatment box, under an air atmosphere, react with atomized water and lithium metal, the initial flow rate of the atomized water is 60mL / s, and the controlled reaction temperature range is 40-85°C, When the reaction temperature is higher than 85°C, reduce the flow rate of atomized water. When the reaction temperature is lower than 40°C, increase the flow rate of atomized water. The flow rate range of atomized water is 10-100mL / s, and the reaction humidity is 10- 100%, after the reaction (that is, when the reaction is substantially stopped and the temperature tends to be stable), the lithium-containing mixture is obtained, and the hydrogen generated in the reaction is burned in the treatment box;

[0077] Wherein, the droplet size of the atomized water is about 1 mm. The heat of reaction can be cooled by the cooling sys...

Embodiment 3

[0085] The present embodiment carries out the detoxification treatment of metal lithium according to the following method:

[0086] (1) In a closed processing box, under an argon atmosphere, react with atomized water and lithium metal, the initial flow rate of the atomized water is 40mL / s, and the controlled reaction temperature range is 50-75°C. When the temperature is higher than 75°C, reduce the flow rate of atomized water. When the reaction temperature is lower than 50°C, increase the flow rate of atomized water. The flow rate of atomized water is in the range of 30-80mL / s, and the reaction humidity is 20-90%. , during the reaction, continue to use the exhaust valve of the treatment box to remove the hydrogen generated by the reaction, after the reaction (that is, the reaction is basically stopped, and the temperature tends to be stable) to obtain a lithium-containing mixture;

[0087] Wherein, the droplet size of the atomized water is about 1.5mm. The exhaust valve of th...

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Abstract

The invention discloses a harmless treatment method for metal lithium. The method comprises: (1) reacting metal lithium and an atomized reactant to obtain a lithium-containing mixture; (2) immersing the lithium-containing mixture obtained in the step (1) into a reactant to carry out a reaction to obtain a lithium-containing solution. The reaction process is controlled by controlling the dosage ofthe atomized reactant, and a passivation layer generated by the atomized reactant and the metal lithium covers the metal lithium to retard the reaction process; after the lithium-containing mixture which is incompletely reacted is immersed into the reactant for neutralization, the passivation layer is dissolved into the reactant, and the metal lithium in the passivation layer solution reacts withthe reactant. The reaction process is controlled by substep control, the severity of the reaction is controlled, and safety of harmless treatment of the metal lithium is improved. Through feeding carbon dioxide, frequent treatment or adjustment of the component concentration of the passivation layer in the reactant is avoided, and lithium carbonate which can be easily and safely recovered is obtained.

Description

technical field [0001] The invention belongs to the technical field of waste treatment and relates to a harmless treatment method, in particular to a harmless treatment method for metal lithium. Background technique [0002] Lithium metal is widely used in the field of lithium batteries. The application also brings about the generation of waste materials such as lithium metal slag and leftovers. Due to the instability of lithium metal, it is easy to produce complex reactions with moisture, oxygen, and nitrogen in the air in the natural environment. chemical reaction: [0003] 4Li+O 2 =2Li 2 o [0004] Li 2 O+CO 2 = Li 2 CO 3 [0005] Li 2 O+H 2 O=2LiOH [0006] Li+H 2 O=LiOH+0.5H 2 [0007] 6Li+N 2 =2Li 3 N, [0008] Although the heat generated per unit time is less, if it cannot be processed in time, the heat cannot be released in time. After a long period of accumulation, the temperature of the waste pile will gradually increase until it reaches spontaneou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08
CPCC01D15/08
Inventor 李峥冯玉川何泓材杨帆南策文
Owner SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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