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Method of treating dust collecting ash of hazardous waste harmlessly

A technology for harmless treatment and hazardous waste, which can be used in the removal of solid waste, auxiliary molding equipment, ceramic molding machines, etc. The effect of high defluorination efficiency

Inactive Publication Date: 2020-09-04
重庆新格环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, people regarded aluminum ash as waste and dumped it, which not only caused a waste of aluminum resources but also brought environmental problems

Method used

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  • Method of treating dust collecting ash of hazardous waste harmlessly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] refer to figure 1 , a method for harmless treatment of hazardous waste dust collection, characterized in that: the method mainly includes the following steps:

[0039] (1) Collect the raw material dust and carry out the first crushing and screening, this step includes:

[0040] ①Convey the collected dust to the storage tank, then carry out vacuum pumping on the collected dust, and send it to the feeding port of the crushing and screening machine;

[0041] ②Sieve the above-mentioned dust collection ash through a crushing and screening machine, and sieve out granular aluminum and fine aluminum ash;

[0042] ③ Send the sieved fine aluminum ash to the rotary kiln storage barrel for subsequent processing by vacuum pumping;

[0043] ④Put the granular aluminum screened this time into a large bag, hoist it to the hopper with a crane, and put it into the rotary furnace for metal aluminum recovery;

[0044] Working principle of primary crushing and screening: belt feeding→vert...

Embodiment 2

[0083] refer to figure 1 , a method for harmless treatment of hazardous waste dust collection, characterized in that: the method mainly includes the following steps:

[0084] (1) Collect the raw material dust and carry out the first crushing and screening, this step includes:

[0085] ①Convey the collected dust to the storage tank, then carry out vacuum pumping on the collected dust, and send it to the feeding port of the crushing and screening machine;

[0086] ②Sieve the above-mentioned dust collection ash through a crushing and screening machine, and sieve out granular aluminum and fine aluminum ash;

[0087] ③ Send the sieved fine aluminum ash to the rotary kiln storage barrel for subsequent processing by vacuum pumping;

[0088] ④Put the granular aluminum screened this time into a large bag, hoist it to the hopper with a crane, and put it into the rotary furnace for metal aluminum recovery;

[0089] Working principle of primary crushing and screening: belt feeding→vert...

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Abstract

The invention discloses a method of treating dust collecting ash of hazardous waste harmlessly. The method is characterized by primarily comprising the following steps of (1) carrying out first time crushing and screening on a raw material collecting dust; (2) melting and casting granular aluminum; (3) carrying out second time crushing and screening on granular aluminum; and (4) carrying out harmless treatment on aluminum ash by dry process defluorination on collected fine aluminum ash. The method is large in treatment capacity, high in defluorination efficiency (usually greater than 99%) andfree of secondary pollution and equipment corrosion, and fluorine-containing wastewater is not discharged and the like, and the capital expenditure and the operating cost are relatively low. The dustcollecting aluminum ash is crushed and screened, a rotary furnace recovers metal aluminum, and then the aluminum ash is then mixed with raw materials such as sand, cement, coal ash, a marble crushed material, granite and the like and auxiliary agents after aluminum removal and denitrification harmless treatment of thermal treatment by the high temperature rotary furnace, and is processed to concrete pavement bricks, so that the dust collecting ash is utilized effectively.

Description

technical field [0001] The invention relates to a method for harmless treatment of hazardous waste in the aluminum industry, in particular to a method for harmless treatment of collected dust. Background technique [0002] Various by-products are produced during the aluminum smelting and forming process. As the main by-product of the aluminum industry, aluminum ash is produced in all aluminum melting processes, and the aluminum content in it accounts for about 1-12% of the total loss in the process of aluminum production and use. In the past, people regarded aluminum ash as waste and dumped it, which not only caused a waste of aluminum resources but also brought environmental problems. [0003] Therefore, finding an economical and effective method to utilize and control aluminum ash will not only improve the economic benefits of the aluminum industry, but also have an important impact on the sustainable development of the economy and society while realizing the effective re...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00B28B17/02
CPCB09B3/00B09B5/00B28B17/02
Inventor 黄耀滨
Owner 重庆新格环保科技有限公司
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