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Method for preparing fluoride-free continuous casting covering slag from used lithium battery saggar

The technology of continuous casting mold powder and saggar is applied in the field of continuous casting mold powder, which can solve the problem of insignificant economic benefit of recycling, achieve obvious social and economic benefits, and realize the effect of recycling waste resources

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

[0006] Overall, the economic benefits of recycling are not obvious

Method used

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  • Method for preparing fluoride-free continuous casting covering slag from used lithium battery saggar

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A new type of fluorine-free continuous casting mold powder, the preparation raw materials of its pre-melting material are: saggar crushed powder after use, 40%, (Al 2 O 3 +SiO 2 +MgO)>91.5%, 2 >99.2%, 2 CO3>99.1%, 2 CO 3 >99%, 3 (R is one of Mg, Ca, Ba): 7%, RCO 3 >98%, 2 >98%, <3μm. After the above powders are mixed uniformly, they are pre-melted in an electric furnace to form slag, and then a glassy pre-melt is obtained by quenching, and crushed to a particle size of less than 50 μm.

[0030] The above-mentioned pre-melting powder, anhydrous borax, carbonaceous raw materials, water-fusible nitrogen-based resin, and water are proportioned according to the following mass fractions: pre-melting powder, 90%, 2 B 4 O 7 >99.2%, 0.1 mm.

[0031] The viscosity at 1300°C of the fluorine-free continuous casting mold flux prepared by the above method is 0.32 Pa·s, and the melting point is 1088°C.

Embodiment 2

[0033] A new type of fluorine-free continuous casting mold powder, the preparation raw materials of its pre-melting material are: saggar crushed powder after use, 70%, (Al 2 O 3 +SiO 2 +MgO)>93.2%, 2 >99.3%, 2 CO3>99.2%, 2 CO 3 >99%, 3 (R is one of Mg, Ca, Ba): 3%, RCO 3 >98%, 2 >98%, <3μm. After the above powders are mixed uniformly, they are pre-melted into slag in an electric furnace, and glassy pre-melt is obtained by quenching and crushed to a particle size of less than 50 μm.

[0034] The above-mentioned pre-melting powder, anhydrous borax, carbonaceous raw materials, water-fusible nitrogen-based resin, and water are proportioned according to the following mass fractions: pre-melting powder, 80%, 2 B 4 O 7>99.1%, 0.1mm.

[0035] The fluorine-free continuous casting mold flux prepared by the above method has a viscosity of 0.11 Pa·s at 1300 °C and a melting point of 1027 °C.

Embodiment 3

[0037] A new type of fluorine-free continuous casting mold flux, the raw material for the preparation of the premelt is: crushed powder from the used sagger, 65%, (Al 2 o 3 +SiO2 2 +MgO)>90.6%,2 >99.3%, 2 CO3>99%, 2 CO 3 >99.2%, 3 (R is one of Mg, Ca, Ba): 5%, RCO 3 >98.2%, 2 >98%, <5μm. After the above powders are mixed, they are 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 <50 μm.

[0038] The above-mentioned premelting powder, anhydrous borax, carbonaceous raw material, water-soluble nitrogen-based resin, and water are proportioned according to the following mass fractions: premelting powder, 81%, 2 B 4 o 7 >99.2%, 0.1 mm.

[0039] The fluorine-free continuous casting mold flux prepared by the above method has a viscosity of 0.23 Pa·s at 1300 °C and a melting point of 1052 °C.

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Abstract

The invention belongs to the technical field of continuous casting covering slag, and relates to a method for preparing fluoride-free continuous casting covering slag from a used lithium battery saggar. The method comprises the following two steps: 1, preparing a pre-melting material, and 2, crushing the pre-melting material into powder, and granulating the powder with anhydrous borax, a carbonaceous raw material, water-soluble nitrogen-based resin and water in a high-speed mixing mill. The method comprises the following specific steps: firstly, preparing the pre-melting material, crushing a used aluminum-magnesium-silicon sagger, mixing the crushed aluminum-magnesium-silicon sagger with quartz sand, bauxite, alkali salt RCO3, potassium carbonate, sodium carbonate and titanium dioxide according to the following proportion, pre-melting the mixture into slag in an electric furnace, quenching to obtain glassy-state pre-melting powder, and crushing the glassy-state pre-melting powder until the granularity is less than 50 microns; and granulating the obtained pre-melted powder, anhydrous borax, a carbonaceous raw material, water-soluble nitrogen-based resin and water in a high-speed mixing mill, and curing and drying to obtain a granulated material. The method realizes waste resource utilization, and particularly has obvious social benefits and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of continuous casting mold slag, and particularly relates to a method for preparing fluorine-free continuous casting mold slag using a lithium battery sagger. Background technique [0002] Continuous casting mold powder is a high-tech technology, which plays a vital role in the quality and output of the casting billet, especially the surface quality of the casting billet. The requirements of rapid continuous casting of defect-free slabs put forward higher requirements for mold flux. At present, most of the mold slag contains different amounts of fluorine, and most of the fluorine compounds are toxic. During the use of the mold slag, part of the mold slag volatilizes in the form of gas, and part of the mold slag enters the secondary cold water and the rolling system in the form of slag coat, causing corrosion. equipment, and cause harm to the human body, eventually pollute the air and water sources, destroy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111Y02P10/20
Inventor 钱凡王龙光刘国齐杨文刚于建宾马渭奎李红霞
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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