Method for preparing ceramsite by using waste incineration fly ash and waste glass

A waste incineration fly ash and waste glass technology, applied in the direction of solid waste removal, application, household appliances, etc., can solve the problems of large land occupation, environmental pollution, toxic substances seepage, etc., achieve high added value, simple process, The effect of improving environmental stability and security

Inactive Publication Date: 2012-08-22
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the treatment method of fly ash in my country is mainly solidified landfill, which not only occupies a large amount of land, but also has the leakage of toxic substances, causing great pollution to the environment

Method used

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  • Method for preparing ceramsite by using waste incineration fly ash and waste glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A, crush and grind 90 parts of waste glass with a mass component number, pass through a 200-mesh sieve, add waste incineration fly ash with a mass component number of 60 while stirring at room temperature at a speed of 20-30 r / min, and add Foaming agent CaCO 3 0.5 parts, continuously stirred and mixed to form a uniform mixture of fly ash + glass powder.

[0033] B. Add 40 parts of domestic waste leachate to the powdery mixture obtained in step A at room temperature while stirring at a speed of 20-30 r / min, and continuously stir and mix to form a uniform mortar mixture.

[0034] C. Granulate the mortar mixture formed in B to make 0.5~1cm pellets. Then put the formed pellets into the muffle furnace for roasting. Control the temperature rise rate of the muffle furnace to 5°C / min, and the temperature rises to 130°C, so that the balls are fully dried and preheated before firing. Raise the temperature at 5°C / min to the calcination temperature of 900°C, and keep the temper...

Embodiment 2

[0039] A. Break and grind 40 parts of waste glass with a mass component number, pass through a 200-mesh sieve, and add waste incineration fly ash with a mass component number of 60 while stirring at room temperature at a speed of 20-30 r / min, and add foaming Agent Na 2 CO 3 5 parts, mixed with continuous stirring to form a uniform fly ash + glass powder mixture.

[0040] B. Add 40 parts of domestic waste leachate to the powdery mixture obtained in step A at room temperature while stirring at a speed of 20-30 r / min, and continuously stir and mix to form a uniform mortar mixture.

[0041] C. Granulate the mortar mixture formed in B to make 0.5~1cm pellets. Then put the formed pellets into the muffle furnace for roasting. Control the temperature rise rate of the muffle furnace to 5°C / min, and the temperature rises to 120°C, so that the balls are fully dried and preheated before roasting. Raise the temperature at 8°C / min to the calcination temperature of 1000°C, and keep the ...

Embodiment 3

[0046] A. Break and grind 80 parts of waste glass with a mass component number, pass through a 200-mesh sieve, and add waste incineration fly ash with a mass component number of 20 while stirring at room temperature at a speed of 20-30 r / min, and add foaming CaCO 3 0.5 parts, continuously stirred and mixed to form a uniform mixture of fly ash + glass powder.

[0047] B. Add 60 parts of domestic waste leachate to the powdery mixture obtained in step A at room temperature while stirring at a speed of 20-30 r / min, and continuously stir and mix to form a uniform mortar mixture.

[0048] C. Granulate the mortar mixture formed in B to make 0.5~1cm pellets. Then put the formed pellets into the muffle furnace for roasting. Control the temperature rise rate of the muffle furnace to 3°C / min, and the temperature rises to 125°C, so that the balls are fully dried and preheated before firing. Raise the temperature at 10°C / min to the calcination temperature of 1200°C, and keep it for 1h....

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Abstract

The invention relates to a method for preparing ceramsite by using waste incineration fly ash and waste glass. The method includes the steps that waste glass is broken and ball ground to 200 meshes, and then waste incineration fly ash, rubbish leachate and a foaming agent are added according to certain proportion; and the mixture is stirred evenly, granulated and placed in a furnace to go through a pre-heating stage, a temperature rising stage and a heat preservation anneal stage to obtain the glass ceramsite. The glass ceramsite prepared through the preparation method is good in structural strength, low in water absorbing rate, large in hardness, good in chemical stability and wide in an application range. Simultaneously, dioxin pollutant in raw materials can be decomposed and damaged, heavy metal is cured in firing products, a toxic leaching standard of our country is met, and a purpose of disposing the rubbish leachate and the waste incineration fly ash is achieved simultaneously. The glass ceramsite produced through the method meets requirements of building aggregate, and the method not only turns waste into wealth, but also protects environment.

Description

technical field [0001] The invention relates to the technical field of hazardous waste treatment and disposal, in particular to a method for preparing ceramsite for construction by utilizing waste incineration fly ash and waste glass. Background technique [0002] Municipal solid waste incineration ash is mainly divided into bottom ash and fly ash according to the different collection locations. Fly ash refers to the residues collected in flue gas cleaning systems and heat recovery systems. Fly ash includes flue gas-carried dust, added chemicals and chemical reaction products, and its physical and chemical properties vary with the type of flue gas purification system in the incineration plant. [0003] The content of molten salt in fly ash is very high, the concentration of leachable heavy metals is relatively high (lead, chromium, mercury, etc.), and it contains trace organic pollutants (dioxin, furan, etc.), so it must be treated innocuously. At the same time, fly ash ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02B09B3/00
Inventor 彭晓春吴彦瑜
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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