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Treatment device and method for slag obtained after overhauling aluminum electrolysis cell

A treatment method and technology of a treatment system, which is applied in the field of the treatment system of aluminum electrolytic overhaul slag, can solve problems such as shutdown, huge environmental fines of production units, etc.

Active Publication Date: 2017-11-28
长沙中硅环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Otherwise, the production unit will not only bear huge environmental fines, but also be at the risk of shutting down at any time

Method used

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  • Treatment device and method for slag obtained after overhauling aluminum electrolysis cell
  • Treatment device and method for slag obtained after overhauling aluminum electrolysis cell
  • Treatment device and method for slag obtained after overhauling aluminum electrolysis cell

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Effect test

Embodiment 1

[0087] like figure 1 As shown, the present invention provides a treatment system for overhaul slag of an aluminum electrolytic cell, including a pretreatment station, a grinding station, a cement kiln incineration treatment furnace system and a waste gas treatment system;

[0088] Described waste gas treatment system comprises the first suction machine 15, the second suction machine 28, the first bag dust collector 14, the second bag dust collector 27 and kiln tail waste gas treatment system 35; The second suction machine 28 and The outlet gas of the first suction machine 15 is connected with the air inlet of the coal injection pipe 32 by pipeline;

[0089] The pretreatment station is provided with an automobile unloading pit 11, an apron feeder 12, a jaw crusher 13, a first bag dust collector 14, and a first suction machine 15; the apron feeder 12 is placed in an automobile The bottom of the unloading pit 11 is connected with the jaw crusher 13, which is used to crush the ov...

Embodiment 2

[0105] like figure 2 As shown, the present invention provides a treatment system for overhaul slag of an aluminum electrolytic cell, including a pretreatment station, a grinding station, a cement kiln incineration treatment furnace system, a waste gas treatment system and a HF removal system;

[0106] Described waste gas treatment system comprises the first suction machine 15, the second suction machine 28, the first bag dust collector 14, the second bag dust collector 27 and kiln tail waste gas treatment system 35; The second suction machine 28 and The outlet gas of the first suction machine 15 is connected with the air inlet of the coal injection pipe 32 by pipeline;

[0107] The HF removal system includes a heavy powder bin 41, a vertical evaporator 44, a cyclone dust collector 46 and a circulating fan 47;

[0108] The pretreatment station is provided with an automobile unloading pit 11, an apron feeder 12, a jaw crusher 13, a first bag dust collector 14, and a first suct...

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Abstract

The invention provides a treatment device and method for slag obtained after overhauling an aluminum electrolysis cell. The treatment method comprises the following steps: crushing the slag obtained after overhauling the aluminum electrolysis cell, mixing the crushed slag with a lime fluoride retention additive, grinding the mixture, performing powder selection circulation to obtain powder, and combusting the powder in a cement kiln, so as to completely eliminate hazards and enable the aluminum electrolysis cell to completely lose toxicity. According to the treatment device and method for slag obtained after overhauling the aluminum electrolysis cell, the overall treatment process is carried out in a sealing environment, exhaust gas generated is basically dry gas and finally discharged after being combusted, so that the clean emission is realized, and the secondary atmospheric pollution is avoided; besides, residue generated is used as a cement clinker and can be effectively reutilized, the risk of secondary pollution is completely eliminated, and the environment and production safety is also realized.

Description

technical field [0001] The invention relates to the technical field of electrolytic aluminum waste treatment, in particular to a treatment system and a treatment method for aluminum electrolytic overhaul slag. Background technique [0002] The overhaul slag of the aluminum electrolytic cell is the solid waste discharged regularly from the aluminum electrolytic cell, and it is a general term for all the waste lining materials and carbon-containing electrode materials removed during the overhaul of the electrolytic cell. It mainly includes cathode carbon blocks, cathode paste, refractory bricks, insulation bricks, anti-seepage materials and insulation boards, etc. Due to the poisonous substance fluoride and a small amount of highly toxic cyanide, the slag from the overhaul of the aluminum electrolytic cell is a hazardous waste and is prohibited by the state. Class I waste that is discarded at will. The aluminum electrolytic cell must be overhauled every 3 to 5 years. Accordin...

Claims

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Application Information

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IPC IPC(8): F23G5/20F23G5/033F23G5/44C04B7/147C04B7/44
CPCF23G5/033F23G5/20F23G5/44F23G5/444C04B7/147C04B7/44F23G2205/20F23G2203/20F23G2201/80Y02P40/121Y02P40/10
Inventor 肖喜才
Owner 长沙中硅环保科技有限公司
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