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Method for producing deoxidizer by utilizing waste silicon carbide of aluminium electrolysis

A technology of waste silicon carbide and deoxidizer, which is applied in the field of deoxidizer in steelmaking, can solve the pollution of waste silicon carbide in aluminum electrolysis, and achieve the effect of low utilization cost and pollution prevention

Inactive Publication Date: 2011-04-13
YICHUAN LONGHAI TECH INDAL
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide an effective utilization method of aluminum electrolysis waste silicon carbide, and take harmless treatment measures in the utilization process, effectively solve the pollution problem of aluminum electrolysis waste silicon carbide, and realize the resource utilization of solid waste

Method used

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Embodiment Construction

[0024] 800 kilograms of aluminum electrolysis waste silicon carbide from which the corroded part is removed is crushed to 100-200 mesh fine powder by jaw crusher, Raymond mill or ball mill; 150 kilograms of water and 20 kilograms of bentonite are added. The above materials are mixed with a mixer to ensure uniform mixing; at the same time, a small part of the corroded waste silicon carbide is sent to a harmless treatment system. It should be noted that the harmless treatment system mentioned in this embodiment involves the applicant's other The independent patented technology does not affect the implementation of the technical solution of the invention, so it will not be introduced in detail. Then use a ball machine to make Ф2~4mm silicon carbide pellets, and naturally cure for 7 days to produce 950 kg of silicon carbide pellets.

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Abstract

The invention relates to a method for producing deoxidizer by utilizing waste silicon carbide of aluminium electrolysis, relating to the technical field of recycling of aluminium electrolysis waste silicon carbide. The aluminium electrolysis waste silicon carbide is mainly silicon carbide brick at the lateral part of an aluminium electrolysis cell. The method comprises the following steps: (1) sorting separation: aluminium electrolysis cell waste silicon carbide after overhaul is sorted and separated from other waste refractory materials and corrosion part on the surface of the waste silicon carbide is removed; (2) crushing: the separated waste silicon carbide is crushed and ground; (3) free treatment: the corrosive waste silicon carbide separated in the step (1) is delivered into a free treatment system to be treated; (4) burdening and mixing: the ground silicon carbide powder is added with water and resin, and the mixture are evenly stirred; (5) balling: the mixed material is delivered to a pelletizing machine to be pelletized into small balls; and (6) curing: the obtained small balls are subject to natural curing for 4-7 days, thus obtaining the deoxidizer. According to the invention, the pollution problem of the aluminium electrolysis waste silicon carbide is effectively solved and the recycling of solid wastes is realized.

Description

[0001] Technical field [0002] The present invention relates to the technical field of aluminum electrolysis waste silicon carbide recycling technology, and mainly relates to a harmless utilization method of waste silicon carbide that does not include waste carbonaceous materials discharged during an aluminum electrolysis overhaul process, and specifically relates to a production method using aluminum electrolysis waste silicon carbide The method of deoxidizer for steelmaking. [0003] Background technique [0004] The solid waste discharged by the electrolytic aluminum plant is mainly the lining of the aluminum electrolytic waste tank. The main composition of the waste tank lining is: cathode carbon block, thermal insulation brick, waste silicon carbide, refractory brick, refractory powder (dry impermeable material), refractory mortar And thermal insulation panels, etc. The lining of the waste tank contains a large amount of soluble fluoride and cyanide, which is a hazardous was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06B09B3/00
CPCY02P10/20
Inventor 任必军魏应伟杨会军张卫东冯汉伟
Owner YICHUAN LONGHAI TECH INDAL
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