Denitrfying agent and method for desulfurizing and denitrating refractory bricks by using denitrfying agent

A technology for desulfurization, denitrification and denitrification agent, which is applied in the field of denitrification agent and refractory brick desulfurization and denitrification. It can solve the problems of leaching toxicity, difficult and efficient use of waste, and large consumption. It achieves uniform distribution of porosity and density, and realizes pollution-free recycling. , the effect of uniform size

Active Publication Date: 2020-12-15
刘保成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to aluminum and aluminum oxides that are easy to recycle, secondary aluminum ash or tertiary aluminum ash also contains a certain amount of active components of aluminum nitride and aluminum carbide, oxides such as Si, Mg, and Fe, K, Na, etc. Chloride; active components such as aluminum nitride and aluminum carbide react with water to produce flammable and toxic gases; soluble salts can cause soil salinization and crop death; some traces of fluoride and heavy metals have leaching toxicity and can cause water pollution
Secondary aluminum ash or tertiary aluminum ash is difficult

Method used

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  • Denitrfying agent and method for desulfurizing and denitrating refractory bricks by using denitrfying agent
  • Denitrfying agent and method for desulfurizing and denitrating refractory bricks by using denitrfying agent
  • Denitrfying agent and method for desulfurizing and denitrating refractory bricks by using denitrfying agent

Examples

Experimental program
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Effect test

Embodiment 1

[0047] see figure 1 , the invention discloses a denitrification agent, which comprises the following components by mass percentage: 95% aluminum ash powder, 5% binder; in this embodiment, the binder is water or glass glue thinner;

[0048] The denitrification agent is prepared through the following steps:

[0049] S1: The primary aluminum ash is sent from the primary aluminum ash storage bin 1 to the ball mill 3 for grinding through the conveyor 2, and the ground aluminum ash is screened on the screening machine 4 to obtain the secondary aluminum ash powder raw material; The primary aluminum ash powder comprises 16-22% aluminum nitride by weight, 18-25% aluminum oxide, and 12-17% aluminum, and the remaining ingredients include sodium, potassium, calcium salts, etc.; the ball mill 3 ball mills The time is 60 minutes, and the primary aluminum ash powder is ground until 80% of the particle size passes through a sieve with a pore size of 125 μm, and the sieving machine 4 at leas...

Embodiment 2

[0054] see figure 1 , the invention discloses a denitrification agent, the denitrification agent comprises the following components by mass percentage: 97% aluminum ash powder, 3% binder; in this embodiment, the binder is water or glass glue thinner;

[0055] The denitrification agent is prepared through the following steps:

[0056] S1: The primary aluminum ash is sent from the primary aluminum ash storage bin 1 to the ball mill 3 for grinding through the conveyor 2, and the ground aluminum ash is screened on the screening machine 4 to obtain the secondary aluminum ash powder raw material; The primary aluminum ash powder comprises 16-22% aluminum nitride by weight, 18-25% aluminum oxide, and 12-17% aluminum, and the remaining ingredients include sodium, potassium, calcium salts, etc.; the ball mill 3 ball mills The time is 90 minutes, and the primary aluminum ash powder is ground until 80% of the particle size passes through a sieve with a pore size of 125 μm, and the sievi...

Embodiment 3

[0061] see figure 1 , the invention discloses a denitrification agent, the denitrification agent comprises the following components by mass percentage: 99% aluminum ash powder, 1% binder; in this embodiment, the binder is water or glass glue thinner;

[0062] The denitrification agent is prepared through the following steps:

[0063] S1: The primary aluminum ash is sent from the primary aluminum ash storage bin 1 to the ball mill 3 for grinding through the conveyor 2, and the ground aluminum ash is screened on the screening machine 4 to obtain the secondary aluminum ash powder raw material; The primary aluminum ash powder comprises 16-22% of aluminum nitride, 18-25% of aluminum oxide, 12-17% of aluminum, and the remaining components include sodium. Potassium, calcium salt, etc.; the milling time of the ball mill 3 is 120min, and the primary aluminum ash is ground until 80% of the particle size passes through a screen with an aperture of 125 μm, and the screen 4 at least incl...

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Abstract

The embodiment of the invention relates to the technical field of aluminum ash hazardous waste treatment, in particular to a denitrifying agent and a method for desulfurizing and denitrifying refractory bricks by using the denitrifying agent, and the denitrifying agent comprises the following components in percentage by weight: 95%-99% of aluminum ash powder and 1%-5% of an adhesive; the denitrifying agent is prepared by the following steps: grinding primary aluminum ash by a ball mill, and screening the ground aluminum ash by a screening machine to obtain a secondary aluminum ash powder raw material; adding the secondary aluminum ash powder raw material and the binder into a double-shaft stirrer according to the mixing amount, and performing uniform stirring and mixing to obtain a uniformly mixed material; and conveying the uniformly mixed material to a forming machine for agglomeration operation to obtain a denitration agent lump material. The denitration agent is used for carrying out deamination treatment on the aluminum ash, nitrogen in the aluminum ash is converted into ammonia gas to be recycled, other types of aluminum elements are prepared into aluminum oxide powder to berecycled, and harmlessness, resource utilization and benefit of aluminum ash treatment are achieved; the flue gas of the refractory brick is efficiently purified by roasting the denitrifying agent andthe refractory brick together.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of aluminum ash hazardous waste treatment, in particular to a denitration agent and a method for desulfurization and denitrification of refractory bricks. Background technique [0002] Aluminum ash is produced in the process of melting all aluminum in the electrolytic aluminum, cast aluminum and recycled aluminum industries. According to incomplete statistics, the production of aluminum ash in my country is about 3 million tons per year. Aluminum ash is rich in aluminum and alumina materials, and its utilization value is very high. According to the number of times aluminum ash is used in the recycling process and the content of metallic aluminum, aluminum ash includes primary aluminum ash, secondary aluminum ash and tertiary aluminum ash. The main difference lies in the content of aluminum and aluminum oxides. The existing The recovery process includes frying ash recovery method, p...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/56
CPCB01D53/81B01D53/56B01D2251/60B01D2258/0283Y02P10/20
Inventor 刘保成
Owner 刘保成
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