Aluminum electrolysis waste cathode harmless and recycling treatment method and system

A technology of aluminum electrolysis waste cathode and treatment system, which is applied in the field of aluminum electrolysis, can solve the problems of secondary pollution, high cost of equipment relocation, no harmless electrolytic aluminum waste tank lining, resource disposal technology, etc., and achieve improvement Harmless, no secondary pollution effect

Inactive Publication Date: 2018-07-13
鲁爽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the market survey, there are generally technical problems such as serious secondary pollution, difficult adjustment of equipment process route, and high cost of equipment relocation and transfer in the process of harmless and resourceful treatment of electrolytic aluminum waste tank lining in various disposal processes.
All electrolytic aluminum enterprises do not have mature electrolytic aluminum waste tank lining harmless and resourceful disposal technology

Method used

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  • Aluminum electrolysis waste cathode harmless and recycling treatment method and system

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Embodiment 1

[0032] The invention discloses a method for harmless and resourceful treatment of waste cathodes of aluminum electrolysis. The waste cathodes are put into the first crushing equipment 1 for crushing, crushed to carbon block particles with a particle size ≤ 10mm, and the crushed carbon block particles are transported to high-temperature treatment. 5 in the equipment is heated to 1500°C, held for 60 minutes and then cooled to room temperature to obtain the first carbon material; the biomass waste is crushed into biomass particles with a particle size of ≤10mm, and the biomass particles are transported to the first drying equipment for drying , after being dried until the water content is less than 10%, the dried material is conveyed into the high-temperature carbonization equipment 17 and heated to 800°C, kept for 60 minutes and then cooled to normal temperature to obtain the second carbon material; the first carbon material, the second carbon material The biomass adhesive is add...

Embodiment 2

[0036] The invention discloses a method for harmless and resourceful treatment of waste cathodes of aluminum electrolysis. The waste cathodes are put into the first crushing equipment 1 for crushing, crushed to carbon block particles with a particle size ≤ 10mm, and the crushed carbon block particles are transported to high-temperature treatment. In equipment 5, heat to 2600°C, keep it warm for 30 minutes, and then cool to room temperature to obtain the first carbon material; crush the biomass waste into biomass particles with a particle size of ≤10mm, and transport the biomass particles to the first drying equipment for drying , after being dried until the water content is less than 10%, the dried material is transported into the high-temperature carbonization equipment 17 and heated to 1000°C, kept for 40 minutes and then cooled to normal temperature to obtain the second carbon material; the first carbon material, the second carbon material The biomass adhesive is added to th...

Embodiment 3

[0040] The invention discloses a method for harmless and resourceful treatment of waste cathodes of aluminum electrolysis. The waste cathodes are put into the first crushing equipment 1 for crushing, crushed to carbon block particles with a particle size ≤ 10mm, and the crushed carbon block particles are transported to high-temperature treatment. 5 in the equipment is heated to 2000°C, kept for 45 minutes and then cooled to room temperature to obtain the first carbon material; the biomass waste is crushed into biomass particles with a particle size of ≤10mm, and the biomass particles are transported to the first drying equipment for drying , after being dried until the water content is less than 10%, the dried material is conveyed into the high-temperature carbonization equipment 17 and heated to 900° C., kept for 60 minutes and then cooled to normal temperature to obtain the second carbon material; the first carbon material, the second carbon material The biomass adhesive is a...

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Abstract

The invention discloses an aluminum electrolysis waste cathode harmless and recycling treatment method and system, and belongs to the technical field of aluminum electrolysis. The aluminum electrolysis waste cathode harmless and recycling treatment method comprises the steps that a waste cathode is processed through high-temperature treatment, so that a first carbon material is obtained; a biomasswaste material is processed through carbonization, so that a second carbon material is obtained; and the first carbon material, the second carbon material and a biomass adhesive are mixed, and afterforming treatment and drying treatment are accomplished, a third carbon material is obtained. The third carbon material can replace or partially replace aggregate materials for production of metallurgy, aluminum anodes and cathodes and electrode pastes such as coke, petroleum coke, calcined anthracite and graphite scraps. The aluminum electrolysis waste cathode harmless and recycling treatment method and system achieve harmless and recycling treatment of the waste cathode. Due to the fact that the waste cathode and biomass energy are matched, the biomass energy is effectively utilized, recycling treatment of the waste cathode can be achieved, non-renewable resources such as coke, petroleum coke, calcined anthracite and graphite scraps are saved, materials generated in the process are effectively utilized, and secondary pollution cannot be caused.

Description

technical field [0001] The invention relates to a harmless and resourceful treatment method and system for waste cathodes of aluminum electrolysis, belonging to the technical field of aluminum electrolysis. Background technique [0002] The electrolytic aluminum waste tank lining is an inevitable solid waste in the electrolytic aluminum production process. The emission per ton of aluminum is 7.5-15kg. The fluoride content in the waste tank lining is usually 30-40%, and the cyanide content is usually 100ppm. According to GB5085.3 of the "Identification Standard for Hazardous Wastes-Leach Toxicity Identification", the fluoride ion content in the waste tank lining is about 1000-5000mg / L, and the cyanide content is 10-30mg / L, both of which are seriously exceeding the standard (the relevant inorganic fluoride in the standard The limit is 100mg / L, cyanide (CN - ) is a hazardous waste (according to the "National Hazardous Waste List", hazardous waste code 331-023-48), direct disch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08C25C3/12C10B53/00C10L5/44
CPCC10B53/00C10L5/44C25C3/08C25C3/125Y02E50/10Y02E50/30
Inventor 鲁爽赵永会
Owner 鲁爽
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