Recovery system and recovery process for aluminum ash

A recycling system and technology for aluminum ash, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve problems such as low recycling efficiency of aluminum ash recycling process

Inactive Publication Date: 2020-07-07
XINGHUA YONGTAI ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide an aluminum ash recovery system to solve the problem of l

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: The reclaimed aluminum ash is ground, and the reclaimed aluminum ash after grinding is sieved, and the sieving fineness is 200 meshes; The mass ratio of clean water is 1:7.5, and sodium carbonate catalyst accounting for 10% of the mass fraction of aluminum ash is added at the same time, the reaction kettle is heated to 60 ° C, and the hydrolysis time is 5h; the hydrolyzed aluminum ash is added to the microbial treatment tank; Thiobacillus was cultivated, and the mass ratio of water hyacinth and corn meal was 1:1, put into the medium, and cultivated at 25°C for 18h. The fully cultivated Thiobacillus ferrooxidans and potassium sulfate with a concentration of 2.5mol / L were added to the microbial treatment tank, reacted for 8 hours, and then the mixture was pickled with excess hydrochloric acid solution, then neutralized by adding sodium hydroxide solution, and allowed to stand. 5h, washed and filtered to obtain a mixed slurry; the mixed slurry in the microbial t...

Embodiment 2

[0026] Example 2: The reclaimed aluminum ash is ground, and the ground reclaimed aluminum ash is sieved, and the sieving fineness is 300 meshes; The mass ratio of clean water is 1:7.5, and sodium carbonate catalyst, which accounts for 15% of the mass fraction of aluminum ash, is added at the same time, and the reaction kettle is heated to 75 ° C, and the hydrolysis time is 8 h; the hydrolyzed aluminum ash is added to the microbial treatment tank; Thiobacillus was cultivated, and the mass ratio of water hyacinth and corn meal was 1:2, put into the medium, and cultivated at 37°C for 20h. The fully cultivated Thiobacillus ferrooxidans and potassium sulfate with a concentration of 2.5mol / L were added to the microbial treatment tank, reacted for 10 hours, and then the mixture was pickled with excess hydrochloric acid solution, then neutralized by adding sodium hydroxide solution, and allowed to stand. 10h, washed and filtered to obtain a mixed slurry; the mixed slurry in the microb...

Embodiment 3

[0027] Example 3: The reclaimed aluminum ash is ground, and the ground reclaimed aluminum ash is sieved, and the sieving fineness is 250 meshes; The mass ratio of clean water is 1:7.5, and sodium carbonate catalyst accounting for 12% of the mass fraction of aluminum ash is added at the same time, the reaction kettle is heated to 70 ° C, and the hydrolysis time is 6h; the hydrolyzed aluminum ash is added to the microbial treatment tank; Thiobacillus was cultivated, and the mass ratio of water hyacinth and corn meal was 1:1.5, put into the medium, and cultivated at 30°C for 20h. The fully cultivated Thiobacillus ferrooxidans and potassium sulfate with a concentration of 2.5mol / L were added to the microbial treatment tank, reacted for 10 hours, and then the mixture was pickled with excess hydrochloric acid solution, then neutralized by adding sodium hydroxide solution, and allowed to stand. 8h, washed and filtered to obtain a mixed slurry; the mixed slurry in the microbial treatm...

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Abstract

The invention provides a recovery system and a recovery process for aluminum ash. The recovery system involves screening equipment for preliminarily screening the recovered aluminum ash, wherein an absorption tower for carrying out deamination treatment on the aluminum ash is connected to the screening equipment; the absorption tower comprises an ammonia gas tank for providing ammonia gas and a reaction kettle; the feeding end of the reaction kettle is connected with the absorption tower, a microbial treatment tank is connected to the discharging end of the reaction kettle, and a calcining device is further connected to the microbial treatment tank. According to the recovery process, a microbial treatment process is added on the basis of a traditional aluminum recovery process so that therecovered aluminum ash can be completely infiltrated in the microbial treatment tank, fluoride in the aluminum ash is decomposed through microorganisms, the content of inorganic salt in treated remaining aluminum slag can be reduced, the proportion of heavy metal components is reduced, and a culture source and a raw material selected for microbial decomposition are cheap and easily available, so that the aluminum ash recovery cost is reduced.

Description

technical field [0001] The invention relates to the technical field of resource recovery and reuse, in particular to an aluminum ash recovery system and a recovery process. Background technique [0002] When aluminum profile enterprises produce aluminum materials, they first need to melt and cast aluminum ingots into aluminum rods and adjust their metal element content, and then use aluminum rods to extrude profiles on an extruder. The casting process of aluminum rods will produce a large amount of aluminum slag, which contains aluminum alloy components, salt additives added during casting, and aluminum nitride. The usual method is to recycle the aluminum slag, and finally turn it into aluminum ash containing very little elemental aluminum. The main components of aluminum ash are aluminum nitride, aluminum oxide and salt additives. When encountering water, it can release a large amount of ammonia gas and heat. It is water-soluble and shows strong alkalinity. This kind of a...

Claims

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Application Information

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IPC IPC(8): B09B3/00
CPCB09B3/00B09B3/40
Inventor 朱志伟
Owner XINGHUA YONGTAI ALUMINUM IND
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