Method for harmlessly treating and recycling aluminum ash

A harmless treatment, aluminum ash technology, applied in chemical instruments and methods, inorganic chemistry, ammonia compounds, etc., can solve problems such as animal and plant growth and human body damage, affecting agricultural ecological balance, destroying the ecological environment, etc., to expand recycling The utilization range, the high recovery rate, the effect of reducing the harm to the environment

Pending Publication Date: 2022-02-18
秦皇岛信宝资源循环科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The traditional disposal method of aluminum ash is landfill or open-air stacking, which not only takes up a lot of land, but also the soluble fluoride and ammonia contained in it will be transferred or volatilized into the atmosphere through wind, sun, and rain, or Mixed with rainwater into rivers, infiltrated into underground polluted soil and groundwater, causing great damage to animal and plant growth and human body, destroying ecological environment, and affecting agricultural ecological balance

Method used

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  • Method for harmlessly treating and recycling aluminum ash
  • Method for harmlessly treating and recycling aluminum ash
  • Method for harmlessly treating and recycling aluminum ash

Examples

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Embodiment 1

[0048] The aluminum ash of an aluminum casting enterprise is comprehensively recycled according to the above method, and the proportion of each component before and after the aluminum ash treatment and the input and output material balance of the aluminum ash are measured, as shown in Table 1-2.

[0049] Table 1 The proportion of each component before and after aluminum ash treatment

[0050] project Metal Aluminum / % AlN / % Alumina / % Fluorine content / % Nitrogen content / % before processing 30 18 50 1 6.15 after treatment 1-3 0-0.2 48 0-0.1 0-0.1

[0051] As can be seen from Table 1, a method for harmless treatment and recycling of aluminum ash provided by the present invention can effectively recycle metal aluminum and aluminum nitride therein, expand the scope of recycling aluminum ash, and reduce the fluorine content and nitrogen content simultaneously. Reduced to 0-0.1%, reducing the environmental hazards of nitrogen and fluorine elem...

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Abstract

The invention discloses a method for harmlessly treating and recycling aluminum ash, and belongs to the technical field of comprehensive utilization of waste resources in the aluminum industry. The invention provides a method for harmlessly treating and recycling aluminum ash. The method comprises the following steps of: S1, primary dry grinding for aluminum extraction; S2, secondary dry grinding for aluminum extraction; S3, deamination; S4, wet grinding and sorting; and S5, fluorine fixation treatment. According to the method for harmlessly treating and recycling aluminum ash, components harmful to the environment in the aluminum ash can be extracted or solidified, harm to the environment is reduced and avoided, the recovery rate of effective components in the aluminum ash is high, the recycling range of the aluminum ash is widened, and meanwhile energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of waste resources in the aluminum industry, in particular to a method for harmless treatment and recycling of aluminum ash. Background technique [0002] Aluminum ash is an important solid waste in the aluminum industry with a huge amount. It is mainly derived from infusible inclusions, oxides, additives, and reaction products produced by physical and chemical reactions with additives floating on the surface of aluminum melt during the production process of smelting aluminum and aluminum alloys. It is produced in all production processes where aluminum is melted. process. [0003] The composition of aluminum ash varies slightly due to different raw materials and operating conditions of various manufacturers, but usually contains metal aluminum, aluminum oxides, nitrides and carbides, salts, other metal oxides (such as SiO 2 , MgO) and some other ingredients. In addition, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B1/00C22B21/00C01C1/02C04B35/63
CPCC22B7/04C22B7/006C22B7/003C22B1/005C22B21/0069C22B21/0023C04B35/6303C01C1/026Y02P10/20
Inventor 陈彦广陈艺文蔡景坤
Owner 秦皇岛信宝资源循环科技有限公司
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