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Method for preparing ceramsite from industrial sludge, waste incineration fly ash and straw as raw materials

A technology for waste incineration fly ash and industrial sludge, which is applied in applications, household utensils, clay products, etc. It can solve the problems of expensive treatment and disposal, large landfill or composting area, secondary pollution, etc., and achieve good economy and environmental benefits

Active Publication Date: 2017-06-13
SHAOXING ENVIRONREM ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current conventional treatment and disposal measures include dry incineration, landfill or composting of industrial sludge; stabilization and solidification of waste incineration fly ash, and safe landfill, all of which have high treatment and disposal costs and landfill or composting landfills. Large, and prone to secondary pollution, has become a severe problem restricting the healthy development of the environment and ecology

Method used

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  • Method for preparing ceramsite from industrial sludge, waste incineration fly ash and straw as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Get 45kg of industrial sludge, 20kg of waste incineration fly ash, 10kg of sodium-based bentonite, 5kg of straw powder, and 5kg of clay. After mixing evenly, add 10% (mass ratio) of water, and fully stir to form a 5-10mm spherical ceramsite raw meal. Then continue to add 5% sodium-based bentonite, 4% straw powder, and a total of 1% water glass and calcium lignosulfonate mixed binder, fully stir and carry out secondary granulation to form spherical ceramsite of 8-15mm The raw material is calcined at 1350°C for 20 minutes in a rotary kiln, and then cooled naturally to obtain lightweight ceramsite. The generated ceramsite has passed the heavy metal leaching toxicity test and is far lower than the concentration limit of GB5085.3-2007 hazardous waste identification standard leaching toxicity identification and GB16689-2008 domestic waste landfill pollutant control standard concentration limit.

Embodiment 2

[0032] Get 30kg of industrial sludge, 15kg of waste incineration fly ash, 15kg of sodium-based bentonite, 5kg of straw powder, and 5kg of clay. After mixing evenly, add 10% (mass ratio) of water, and fully stir to form a 5-10mm spherical ceramsite raw meal. Then continue to add 5% sodium bentonite, 4% straw powder and a total amount of 1% water glass and calcium lignosulfonate mixed adhesive, mix and then add 10% (mass ratio) of water after fully stirring Secondary granulation, shaped into 8-15mm spherical ceramsite raw material, calcined at 1350°C for 15 minutes in a rotary kiln, and naturally cooled to obtain light ceramsite. The generated ceramsite has passed the heavy metal leaching toxicity test and is far lower than the concentration limit of GB5085.3-2007 hazardous waste identification standard leaching toxicity identification and GB16689-2008 domestic waste landfill pollutant control standard concentration limit.

Embodiment 3

[0034] Get 50kg of industrial sludge, 30kg of waste incineration fly ash, 15kg of sodium-based bentonite, 5kg of straw powder, and 5kg of clay. After mixing evenly, add 10% (mass ratio) of water, and fully stir to form a 5-10mm spherical ceramsite raw meal. Then continue to add 5% sodium bentonite, 4% straw powder and a total amount of 1% water glass and calcium lignosulfonate mixed binder, mix and then add 10% (mass ratio) of water after fully stirring Secondary granulation, shaped into 8-15mm spherical ceramsite raw material, calcined at 1350°C for 25 minutes in a rotary kiln, and naturally cooled to obtain light ceramsite. The generated ceramsite has passed the heavy metal leaching toxicity test and is far lower than the concentration limit of GB5085.3-2007 hazardous waste identification standard leaching toxicity identification and GB16689-2008 domestic waste landfill pollutant control standard concentration limit.

[0035] The following table shows that the ceramsite prod...

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Abstract

The invention relates to a method for preparing ceramsite from industrial sludge, waste incineration fly ash and straw as raw materials. The method comprises process steps as follows: the industrial sludge, the waste incineration fly ash, sodium bentonite, straw powder and clay are mixed uniformly, and a primary mixed material is obtained; water is added to the mixed material, granulation forming is performed after sufficient stirring is performed, and 5-10 mm spherical ceramsite raw materials are formed; sodium bentonite, straw powder and a sodium silicate and calcium lignosulphonate mixed adhesive with the total content being 1% are continuously added to the ceramsite raw materials and sufficiently stirred for secondary granulation, and 8-15 mm spherical ceramsite raw materials are formed; the ceramsite raw materials are calcined at a high temperature in a rotary kiln, and the lightweight ceramsite is obtained after natural cooling. Multiple industrial solid wastes (including the industrial sludge, the waste incineration fly ash and the straw) are taken as the raw materials of the ceramsite to be recycled, secondary pollution is realized through harmless and resourceful treatment of the solid wastes, and environmental and economic benefits are realized synchronously.

Description

[0001] 【Technical field】 [0002] The invention relates to a method for preparing lightweight ceramsite, in particular to a method for preparing ceramsite by using industrial sludge, waste incineration fly ash and straw as raw materials, and belongs to the technical field of resource reuse. [0003] 【Background technique】 [0004] The sewage produced by printing and dyeing and pharmaceutical chemical plants will produce a large amount of industrial surplus sludge during purification and treatment. At present, the phenomenon of "sludge siege" has appeared in areas where the chemical industry is concentrated; these industrial sludge not only have high water content and volume If it is not safely disposed of, it will not only directly affect the normal operation of the sewage treatment plant, but also cause secondary pollution to the surrounding environment. At the same time, the incineration fly ash produced by waste incineration plants across the country must not be stored for a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/135C04B33/13C04B33/132C04B33/32C04B38/06
CPCC04B33/13C04B33/1305C04B33/131C04B33/1321C04B33/135C04B33/32C04B38/009C04B38/0675Y02P40/60
Inventor 罗春晖郑彬
Owner SHAOXING ENVIRONREM ENVIRONMENTAL TECH CO LTD
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