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Process for extracting active Al(OH)3 product by utilizing aluminum ash or aluminum-rich waste residue

A technology of aluminum waste residue and activity, which is applied in the field of industrial waste residue extraction of aluminum hydroxide products, can solve the problems that aluminum ash cannot be effectively treated, the filter press cannot be filtered, and the environmental protection facilities are blocked, and achieves white color, reduced consumption, and environmental conditions. Good results

Inactive Publication Date: 2019-03-08
JIAOZUO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum slag contains a certain amount of bright aluminum (aluminum single substance), many manufacturers pull the aluminum slag to refine bright aluminum, and the remaining aluminum ash cannot be effectively processed
Due to the high content of Al2O3 in aluminum ash, some people use aluminum ash to produce calcium aluminate powder. It turns out that the environmental protection facilities will be blocked during calcination, and the filter press will not be able to filter when producing polyaluminum; Adding acid directly to aluminum ash to produce polyaluminum chloride will also cause problems such as filter press clogging
Therefore, a large amount of aluminum ash is discarded, and there is no effective way of utilization so far, which not only causes a waste of resources, but also causes many environmental problems.

Method used

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  • Process for extracting active Al(OH)3 product by utilizing aluminum ash or aluminum-rich waste residue

Examples

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Effect test

Embodiment 1

[0030] Such as figure 1 and 2 As shown, a method of extracting active Al(OH) by using aluminum ash or aluminum-rich waste slag 3 Product process, including the following steps:

[0031] S1, Alkaline treatment of waste slag, mixing aluminum ash with a particle size of not more than 80 mesh and 50% sodium carbonate alkaline water at normal temperature and pressure and allowing to stir evenly, and the mixing time is 10 minutes to obtain basic aluminum Ash mixture, and then dry the alkaline aluminum ash mixture at a constant temperature of 90°C until the water content is 3%, then raise the temperature to 700°C at a constant speed within 5 minutes, and calcinate at a constant temperature of 700°C for 20 minutes, wherein the calcination process CO produced in 2 The tail gas is purified and recovered for later use, and the calcined solid mixture is crushed by crushing equipment when it is naturally cooled to 200°C to obtain an alkaline powder mixture with a particle size not great...

Embodiment 2

[0039] Such as figure 1 and 2 As shown, a method of extracting active Al(OH) by using aluminum ash or aluminum-rich waste slag 3 Product process, including the following steps:

[0040] S1, Alkaline treatment of waste slag, mixing aluminum-rich waste slag with a particle size of no more than 80 meshes and 90% sodium carbonate alkaline water at normal temperature and pressure, and allowed to stir evenly, and the stirring and mixing time was 60 minutes to obtain alkaline Aluminum-rich waste slag mixture, and then dry the alkaline aluminum-rich waste slag mixture at a constant temperature of 150°C until the water content is 1%, and then raise the temperature to 1200°C at a uniform rate within 10 minutes, and calcinate at a constant temperature of 1200°C for 120 minutes, wherein CO produced during calcination 2 The tail gas is purified and recovered for later use, and the calcined solid mixture is pulverized by a crushing equipment when it is naturally cooled to 100°C to obtain...

Embodiment 3

[0048] Such as figure 1 and 2 As shown, a method of extracting active Al(OH) by using aluminum ash or aluminum-rich waste slag 3 Product process, including the following steps:

[0049] S1, Alkaline treatment of waste slag, mixing aluminum ash and aluminum-rich waste slag with a particle size of no more than 80 mesh in any proportion and sodium carbonate alkaline water with a concentration of 80% at normal temperature and pressure and allowed to stir evenly, and The stirring and mixing time is 20 minutes to obtain the alkaline aluminum-containing waste residue mixture, and then the aluminum-containing waste residue mixture is dried at a constant temperature of 120°C until the water content is 0, and then the temperature is raised to 1000°C at a uniform speed within 5 minutes, and then heated at 1000°C Calcined for 60 minutes in a constant temperature environment, the CO produced during the calcination process 2 The tail gas is purified and recovered for later use, and the c...

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Abstract

The invention relates to a process for extracting active Al(OH)3 product by utilizing aluminum ash or aluminum-rich waste residue, which comprises four steps, i.e. alkaline treatment of waste residue,primary washing, separation of active Al(OH)3 and treatment of tailings. The process disclosed by the invention can effectively utilize aluminum-rich waste residue as a material for the production ofactive Al(OH)3, extracted active Al(OH)3 can lead to a revolutionary progress in the production of polyaluminium chloride, moreover, active Al(OH)3 can also be used as flame retardant and the like, so the application prospect is broad. The effective utilization of waste residue (such as aluminum ash) is realized, and the influence of waste residue piling on the environment is solved. Waste gas, waste water and waste residues in the process of production are effectively applied, so the process is a technique which particularly has practical value.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of aluminum ash or aluminum-rich waste slag, and in particular relates to a process for extracting aluminum hydroxide products from industrial waste slag such as activated aluminum ash by wet alkali-calcination. Background technique [0002] Aluminum ash is one of the industrial wastes. There are two types of aluminum ash: electrolytic aluminum ash and smelting aluminum ash. Electrolytic aluminum ash is electrolytic aluminum 2 o 3 Produced in the process of producing elemental Al, various by-products will be produced in the process of aluminum smelting and forming. 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. Smelting aluminum ash is produced during aluminum smelting, and some impure mixed metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/08C01F7/14
CPCC01F7/08C01F7/142
Inventor 付克明郑丙利李艳粉原东林
Owner JIAOZUO UNIV
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