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Harmless remediation method and device of electrolytic aluminum waste slag and contaminated soil of electrolytic aluminum waste slag

A technology of electrolytic aluminum waste slag and repair method, which is applied in the restoration of polluted soil, etc., and can solve problems such as unconsidered anti-seepage, difficult government supervision, and no protective measures

Active Publication Date: 2017-03-22
XINZHONGTIAN ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the south, due to the large amount of rainwater, the general electrolytic aluminum enterprises have carried out some anti-seepage treatment on the landfill site, but the treatment of a large amount of rainwater seepage will cost a lot of money every year, which makes it difficult for the government to supervise
However, the media revealed that the poor management of electrolytic aluminum waste landfills has brought great harm to the lives and property of local people.
However, in the arid areas of the north, due to cost issues, many electrolytic aluminum companies did not consider the problem of anti-seepage, and directly dumped these waste residues on the open ground without any protective measures.
The electrolytic aluminum maintenance waste dump that is buried as general industrial solid waste in the arid area of ​​northern China may not only become a source of danger for tens of thousands of years, but also has the risk of spreading and transferring the source of danger with sandstorms (especially sandstorms)

Method used

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  • Harmless remediation method and device of electrolytic aluminum waste slag and contaminated soil of electrolytic aluminum waste slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1 The harmless restoration method of electrolytic aluminum waste slag and its polluted soil

[0065] Step 1: Sorting out easily identifiable, bulky reusable materials including anode and cathode carbon blocks, iron blocks, aluminum blocks, sintered and dissolved alumina cryolite blocks, silicon carbide and nitride Silicon refractory bricks, etc.;

[0066] Step 2: Apply artificial impact hammer or wheeled mechanical impact hammer to the large material that cannot directly enter the hopper of the crushing system for crushing and pretreatment into small pieces that can enter the crushing system;

[0067] Step 3: Send the coarsely crushed material in step 2 to the crushing system with a conveyor belt for crushing, and the crushed particle size is ≤10mm;

[0068] Step 4: Take coarse samples evenly at multiple points, grind them, and weigh 100g after intercepting the test product by the method of quartering the round cake multiple times, add 100ml of water, stir, fil...

Embodiment 2

[0072] Example 2 The harmless restoration method of electrolytic aluminum waste slag and its polluted soil

[0073] Step 1: Sorting out easily identifiable, bulky reusable materials including anode and cathode carbon blocks, iron blocks, aluminum blocks, sintered and dissolved alumina cryolite blocks, silicon carbide and nitride Silicon refractory bricks, etc.;

[0074] Step 2: Apply artificial impact hammer or wheeled mechanical impact hammer to the large material that cannot directly enter the hopper of the crushing system for crushing and pretreatment into small pieces that can enter the crushing system;

[0075] Step 3: Send the coarsely crushed material in step 2 to the crushing system with a conveyor belt for crushing, and the crushed particle size is ≤10mm;

[0076] Step 4: Take coarse samples evenly at multiple points, grind them, and weigh 100g after intercepting the test product by the method of quartering the round cake multiple times, add 100ml of water, stir, fil...

Embodiment 3

[0081] Example 3 The harmless restoration method of electrolytic aluminum waste slag and its polluted soil

[0082] Step 1: Sorting out easily identifiable, bulky reusable materials including anode and cathode carbon blocks, iron blocks, aluminum blocks, sintered and dissolved alumina cryolite blocks, silicon carbide and nitride Silicon refractory bricks, etc.;

[0083] Step 2: Apply artificial impact hammer or wheeled mechanical impact hammer to the large material that cannot directly enter the hopper of the crushing system for crushing and pretreatment into small pieces that can enter the crushing system;

[0084] Step 3: Send the coarsely crushed material in step 2 to the crushing system with a conveyor belt for crushing, and the crushed particle size is ≤10mm;

[0085] Step 4: Take coarse samples evenly at multiple points, grind them, and weigh 100g after intercepting the test product by the method of quartering the round cake multiple times, add 100ml of water, stir, fil...

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Abstract

The invention belongs to the field of environment protection, and relates to a soil remediation technology and device, in particular to a harmless remediation treatment technology and device of electrolytic aluminum waste slag and contaminated soil of the electrolytic aluminum waste slag. According to a harmless treatment method of the electrolytic aluminum waste slag and the contaminated soil of the electrolytic aluminum waste slag, cyanide, soluble fluoride and other harmful substances can be removed simply, economically and efficiently, and green harmless treatment of the electrolytic aluminum waste slag and contamination therefore is achieved. According to the harmless treatment device of the electrolytic aluminum waste slag and the contaminated soil of the electrolytic aluminum waste slag, a rotary stirring tank is used as a stirring system for the first time to carry out harmless treatment of the electrolytic aluminum waste slag and the contaminated soil thereof, the walking speed of materials is adjusted by adjusting the tilt angle of the rotary stirring tank, and therefore the mixing effect is adjusted, the design length of the rotary stirring tank is reduced, the device is simple, and the equipment manufacturing cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a soil restoration technology and device, in particular to a harmless restoration treatment technology and device for electrolytic aluminum waste slag and its polluted soil. Background technique [0002] The main solid waste of the electrolytic aluminum plant is the waste slag generated during the overhaul of the electrolytic cell, which is usually called the overhaul waste slag. Before the official implementation of the new "National Hazardous Waste List" on August 1, 2016, most of these waste residues were directly landfilled as general industrial solid waste. Under normal circumstances, an electrolytic aluminum plant with an annual output of 400,000 tons produces about 12,000 tons of waste slag every year. The output of electrolytic aluminum in my country is tens of millions of tons per year, and it is increasing at a rate of about 10% every year. New electrolytic aluminu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/30B09C1/08A62D101/49A62D101/45
CPCA62D3/30A62D2101/45A62D2101/49A62D2203/10B09C1/08
Inventor 眭方荣
Owner XINZHONGTIAN ENVIRONMENTAL PROTECTION
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