Aluminum electrolysis waste tank lining harmless treatment device and treatment method

A technology of harmless treatment and waste tank lining, which is applied in the direction of solid waste removal, etc., can solve the problems of low treatment efficiency, and achieve the effect of high treatment efficiency, good effect and flexible operation.

Active Publication Date: 2017-11-24
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this treatment method only includes three chambers, one leaching chamber and two reaction chambers. One of the two reaction chambers is used to remove fluoride and the other to remo

Method used

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  • Aluminum electrolysis waste tank lining harmless treatment device and treatment method
  • Aluminum electrolysis waste tank lining harmless treatment device and treatment method
  • Aluminum electrolysis waste tank lining harmless treatment device and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) The aluminum electrolytic waste tank lining is crushed and pulverized into powder.

[0039] (2) The first step: add water and powder to the reaction chamber of this step, the mass ratio of water and powder is 1:1, the reaction time of this step is 30min, the adding speed of water is 20m³ / h, the powder The feeding rate is 20t / h, and the first step requires a reaction chamber whose volume is not less than 30m³.

[0040](3) The second step: Add cyanide-removing agent bleaching powder to the reaction chamber of this step, the addition amount is 1.5% of the powder mass, the reaction time of this step is 30min, the adding speed of bleaching powder is 300Kg / h, and the slurry pouring speed It is 20m³ / h, and the second step requires a reaction chamber with a volume of not less than 30m³.

[0041] (4) The third step: Add quicklime, a defluoridation agent, to the reaction chamber of this step, the amount added is 5% of the mass of the powder, the reaction time of this step is...

Embodiment 2

[0049] (1) The aluminum electrolytic waste tank lining is crushed and pulverized into powder.

[0050] (2) The first step: add water and powder to the reaction chamber of this step, the mass ratio of water and powder is 5.0:1.0, the reaction time of this step is 60min, and the adding speed of water in each reaction chamber is 20m³ / h, powder feeding speed 4t / h, the first step requires two reaction chambers, the volume of which is not less than 30m³.

[0051] (3) The second step: add defluoridation agent slaked lime to the reaction chamber of this step, the addition amount is 15% of the powder mass, the reaction time of this step is 30min, the lime addition speed is 1.2t / h, and the slurry is poured The feed rate is 40m³ / h. The second step requires a reaction chamber with a volume of not less than 40m³. The two reaction chambers in the first step are simultaneously poured into one reaction chamber in the second step.

[0052] (3) The third step: add cyanide-removing agent bleach...

Embodiment 3

[0060] (1) The aluminum electrolytic waste tank lining is crushed and pulverized into powder.

[0061] (2) The first step: add water and powder to the reaction chamber of this step, the mass ratio of water to powder is 10:1, the reaction time of this step is 120min, and the adding speed of water in each reaction chamber is 15m³ / h, powder feeding speed 1.5t / h, the first step requires four reaction chambers, the volume of which is not less than 40m³.

[0062] (3) The second step: add cyanide-removing agent bleaching powder to the reaction chamber of this step, the addition amount is 8.0% of the powder mass, the reaction time of this step is 60min, and in each reaction chamber, the adding speed of bleaching powder is 240Kg / h, the slurry pouring speed is 30m³ / h, the second step requires two reaction chambers, and the volume of the reaction chamber is not less than 50m³, and the two reaction chambers in the first step are poured into one reaction chamber in the second step at the ...

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Abstract

The invention relates to an aluminum electrolysis waste tank lining harmless treatment device and a treatment method. The treatment device is characterized by comprising a water adding reaction bin, a cyanogen removing agent or fluorine removing agent adding reaction bin, a fluorine removing agent or cyanogen removing agent adding reaction bin, a neutralizing agent adding reaction bin and a collecting bin connected in sequence. The treatment method comprises the following process: an aluminum electrolysis waste tank lining is crushed and milled as powder to feed in the water adding reaction bin, the cyanogen removing agent or fluorine removing agent adding reaction bin, the fluorine removing agent or cyanogen removing agent adding reaction bin, the neutralizing agent adding reaction bin and the collecting bin in sequence; charging, reaction and discharge are performed at the same time to form continuous aluminum electrolysis waste tank lining harmless treatment process; treated slurry is totally poured in the collecting bin, and is injected in a filter press by the collecting bin for pressing and filtration; harmless slag is carried out; and filtrate is recycled, so that the waste tank lining harmless treatment is realized, the treatment efficiency is high, the effect is good, and the operation is flexibility, simple and convenient.

Description

technical field [0001] The invention relates to a harmless treatment device and method for aluminum electrolysis waste tank lining, which relates to a process and method for harmless treatment of industrial solid waste produced in the process of aluminum electrolysis, especially waste aluminum electrolysis tank lining. Background technique [0002] With the increase of aluminum production in my country, the discharge of waste tank linings is also increasing year by year, and about 15-25kg of waste tank linings are discharged for every 1 ton of aluminum produced. The waste tank lining is an unavoidable solid hazardous waste in the production of aluminum electrolysis, which has been included in the "National Hazardous Waste List". The main toxic substances are soluble fluoride and cyanide, which are harmful to the environment, including soil, water and atmosphere. The harm is great, so the harmless treatment of the waste tank lining needs to be solved urgently. At present, th...

Claims

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Application Information

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IPC IPC(8): B09B3/00
CPCB09B3/00
Inventor 杜婷婷王珣罗英涛陈开斌罗钟生孙丽贞蒋杨李冬生
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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