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Method used for carrying out innocent treatment on hazardous waste electrolytic aluminum ash

A technology for harmless treatment and hazardous waste, which is applied in the field of harmless treatment of electrolytic aluminum and aluminum ash, can solve problems such as waste of aluminum resources and the environment, and achieves low capital construction costs and operating costs, large processing capacity, and fluorine removal efficiency. high effect

Inactive Publication Date: 2020-09-01
重庆新格环保科技有限公司
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  • 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 used for carrying out innocent treatment on hazardous waste electrolytic aluminum ash

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Effect test

Embodiment 1

[0040] refer to figure 1 , a method for harmless treatment of hazardous waste electrolytic aluminum ash, characterized in that: the method mainly includes the following steps:

[0041] (1) The raw material electrolytic aluminum ash is crushed and screened for the first time. This step includes:

[0042] ①Convey the collected electrolytic aluminum ash to the storage tank, then carry out vacuum pumping on the electrolytic aluminous ash, and send it to the feeding port of the crushing and screening machine;

[0043] ②Sieve the above-mentioned electrolytic aluminum ash through a crushing and screening machine, and sieve out granular aluminum and fine aluminum ash;

[0044] ③ Send the sieved fine aluminum ash to the rotary kiln storage barrel for subsequent processing by vacuum pumping;

[0045] 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;

[0046] (2) Melting ...

Embodiment 2

[0093] refer to figure 1 , a method for harmless treatment of hazardous waste electrolytic aluminum ash, characterized in that: the method mainly includes the following steps:

[0094] (1) The raw material electrolytic aluminum ash is crushed and screened for the first time. This step includes:

[0095] ①Convey the collected electrolytic aluminum ash to the storage tank, then carry out vacuum pumping on the electrolytic aluminous ash, and send it to the feeding port of the crushing and screening machine;

[0096] ②Sieve the above-mentioned electrolytic aluminum ash through a crushing and screening machine, and sieve out granular aluminum and fine aluminum ash;

[0097] ③ Send the sieved fine aluminum ash to the rotary kiln storage barrel for subsequent processing by vacuum pumping;

[0098] 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;

[0099] (2) Melting ...

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Abstract

The invention discloses a method used for carrying out innocent treatment on hazardous waste electrolytic aluminum ash. The method is characterized by mainly comprising the following steps that firstly, raw material electrolytic aluminum ash is subjected to first-time breaking and screening; secondly, particle aluminum is subjected to melting and ingot casting; thirdly, the particle aluminum is subjected to secondary breaking and screening; and fourthly, the collected fine aluminum ash is subjected to dry method fluorine removal aluminum ash harmless treatment. The treatment method is large intreatment amount, high in fluorine removal efficiency (generally larger than 99%), free of draining fluorine containing waste water, free of secondary pollution and equipment and equipment corrosionand the like, and capital construction cost and running cost are both low.

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 electrolytic aluminum ash. 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 e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/00C22B7/02C04B5/06C04B18/14C04B35/66
CPCC04B5/06C04B18/144C04B35/62204C04B35/66C22B7/02C22B21/0069C22B21/0092Y02W30/91Y02P10/20
Inventor 黄耀滨
Owner 重庆新格环保科技有限公司
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