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Method for preparing anti-oxidation coating from used lithium battery sagger

An anti-oxidation coating and saggar technology, applied in the direction of coating, can solve the problems of easy oxidation of graphite, reduced safety, loose structure, etc., and achieve the effects of not easy to deteriorate, reducing the amount of addition, and reducing costs.

Active Publication Date: 2021-08-31
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the continuous casting process, some of the above-mentioned functional refractory materials are exposed to high-temperature air, and the graphite in the product is easily oxidized at high temperature, resulting in loose material structure, reduced strength, and reduced safety in use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An anti-oxidation coating is prepared with a lithium battery sagger, the raw materials for the preparation of the premelted material are as follows in terms of mass percentages: the broken powder of the used sagger, the broken powder of the used sagger, 85%, (Al 2 o 3 +SiO2 2 +MgO)>90%, 2 B 4 o 7 >99%, <0.1mm;

[0026] Mix the above-mentioned powders and pre-melt them into slag in an electric furnace, and obtain glassy pre-melts after quenching, and crush them to a particle size of <30 μm;

[0027] The above-mentioned premelting powder, silicon carbide, metal silicon powder, aluminum dihydrogen phosphate powder, and hydroxyethyl cellulose are mixed according to the following mass fractions: premelting powder, 60%, 98%, 90%, <30μm; aluminum dihydrogen phosphate powder: 3%, <0.2mm; hydroxyethyl cellulose, 0.5%, viscosity 30000, < 0.2mm.

[0028] Just mix the upper solid paint with a certain proportion evenly, and the amount of water added accounts for 65% of the mass...

Embodiment 2

[0030] An anti-oxidation coating is prepared with a lithium battery sagger, and the raw materials for the preparation of the premelt are as follows in terms of mass percentages: the broken powder of the used sagger, the broken powder of the used sagger, 71%, (Al 2 o 3 +SiO2 2 +MgO)>90%, 2 B 4 o 7 >99%, <0.1mm

[0031] After the above powder is mixed, it is pre-melted into slag in an electric furnace, and the glassy pre-melt is obtained through rapid cooling, and crushed to a particle size of <30 μm.

[0032] The above-mentioned premelting powder, silicon carbide, metal silicon powder, aluminum dihydrogen phosphate powder, and hydroxyethyl cellulose are mixed according to the following mass fractions: premelting powder, 78%, 98%, 90%, <30μm; aluminum dihydrogen phosphate powder: 1.8%, <0.2mm; hydroxyethyl cellulose, 0.2%, viscosity 60000, < 0.2mm.

[0033] Just mix the upper solid paint with a certain proportion evenly, and the amount of water added accounts for 50% of the...

Embodiment 3

[0035] A kind of post-use lithium battery sagger to prepare anti-oxidation coating, the preparation raw material of its premelting material is as follows by mass percentage: post-use sagger crushing powder, post-use sagger crushing powder, 84%, (Al 2 o 3 +SiO2 2 +MgO)>90%, 2 B 4 o 7 >99%, <0.1mm

[0036] After the above powder is mixed, it is pre-melted into slag in an electric furnace, and the glassy pre-melt is obtained through rapid cooling, and crushed to a particle size of <30 μm.

[0037] The above-mentioned premelting powder, silicon carbide, metal silicon powder, aluminum dihydrogen phosphate powder, and hydroxyethyl cellulose are mixed according to the following mass fractions: premelting powder, 63.6%, 98%, 90%, <30μm; aluminum dihydrogen phosphate powder: 1%, <0.2mm; hydroxyethyl cellulose, 0.4%, viscosity 100000, < 0.2mm.

[0038] Just mix the upper solid paint with a certain proportion, and the amount of water added accounts for 35% of the mass fraction of th...

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Abstract

The invention belongs to the technical field of recycling of used refractory materials, and particularly relates to a method for preparing an anti-oxidation coating from a used lithium battery sagger. The method for preparing an anti-oxidation coating from a used lithium battery sagger comprises the following two steps of: 1, preparing a pre-melted material; and 2, crushing the pre-melted material into powder, and well mixing the powder with silicon carbide, metal silicon powder and other raw materials to obtain the anti-oxidation coating. Specifically, a pre-melted material is prepared first, namely, a used aluminum-magnesium-silicon sagger is crushed as a main component and mixed with anhydrous borax, potassium feldspar or albite, the mixture is pre-melted into slag in an electric furnace, quenching is carried out to obtain a glassy pre-melted material, and the glassy pre-melted material is crushed into pre-melted powder with the particle size of less than 30 microns; and the prepared pre-melted powder is well mixed with silicon carbide, metal silicon powder and hydroxyethyl cellulose in a mixing mill to obtain the anti-oxidation coating. According to the invention, the cost is reduced, waste resource utilization is realized, and the method has obvious social benefits and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of recycling used refractory materials, and in particular relates to a method for preparing an anti-oxidation coating from a used lithium battery sagger. Background technique [0002] The development of new energy is an important energy strategy in my country. With the rapid development of the lithium-ion battery industry, the output of lithium-ion cathode materials has reached more than 400,000 tons in 2020. The cathode materials are generally synthesized by solid-state sintering, and the reaction vessels are usually aluminum Silicic saggers, aluminosilicate saggers Main mineral phases: mullite, cordierite, corundum, spinel, quartz, glass, etc. The main components are as follows: Al 2 o 3 : 30~70%, SiO 2 : 10~40%, MgO: 5~20%. [0003] The Chinese market needs more than 20 million balls for saggers. Calculated at 6kg per piece, the solid waste generated will reach 120,000 tons. The used saggers are covered...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/61C09D7/43
CPCC09D1/00C09D7/61C09D7/43
Inventor 刘国齐钱凡杨文刚王龙光于建宾马渭奎李红霞
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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