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Preparation method of high-performance sintered insulation brick

A high-performance technology for thermal insulation bricks, applied in clay products, ceramic products, applications, etc., can solve problems such as low strength and poor thermal insulation performance, and achieve the effects of increasing porosity, reducing sintering shrinkage, and easy mechanized operation

Active Publication Date: 2019-08-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: The purpose of this invention is to provide a method for preparing high-performance sintered insulation bricks, which uses materials such as rice husk ash, domestic sewage sludge, papermaking sludge, construction dregs, clay, and sodium chloride to prepare sintered high-performance insulation bricks. Bricks overcome the low strength of traditional thermal insulation bricks, poor thermal insulation performance and low strength after sintering, and realize the industrial production of high-performance sintered thermal insulation bricks; reduce environmental pollution, and realize sludge harmless treatment and resource utilization use

Method used

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Examples

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Effect test

preparation example Construction

[0024] A kind of preparation method of high-performance sintered insulation brick of the present invention comprises the following steps:

[0025] Step 1. Sludges such as urban domestic sewage treatment plant sludge and paper mill sludge are concentrated and filtered to obtain sludge with a moisture content of 75% to 85%, and the sludge is dried to obtain a moisture content of 2%. ~3% of dried sludge.

[0026] Step 2: Drying the clay naturally, crushing the construction dregs and sludge in multiple stages, and sieving them for later use.

[0027] Step 3: Mix the above raw materials uniformly according to a certain mass ratio to obtain a dry mixture, add an appropriate amount of water and stir evenly to obtain a wet mixture. Among them, the mass ratio is 30-50 parts for sludge, 5-15 parts for rice husk ash, 40-60 parts for clay, 1-5 parts for sodium chloride, and 15-25 parts for water.

[0028] Step 4: Aging treatment is carried out on the wet material of the mixture, and the...

Embodiment 1

[0035] A preparation method of high-performance sintered heat insulating brick comprises the following steps:

[0036] Step 1. Add flocculants, deodorants to concentrate the sludge from urban domestic sewage treatment plants, press filter to obtain sludge with a moisture content of 80%, and dry the sludge to obtain dried sludge with a moisture content of 3%. .

[0037] Step 2: Drying the clay naturally, crushing the construction dregs and sludge in multiple stages, passing through a 50-mesh sieve, and storing for later use.

[0038] Step 3: mixing the sludge, rice husk ash, construction dregs, and sodium chloride uniformly according to a certain mass ratio to obtain a dry mixture, adding an appropriate amount of water and stirring evenly to obtain a wet mixture. Among them, 40 parts of sludge, 50 parts of clay, 10 parts of rice husk ash, three parts of sodium chloride and 20 parts of water are calculated by mass.

[0039] Step 4: Aging the wet mixture at a temperature of 20°...

Embodiment 2

[0045] A method for preparing high-performance sintered insulation bricks, comprising the following steps:

[0046] Step 1. Add flocculants, deodorants to concentrate the sludge from urban domestic sewage treatment plants, press filter to obtain sludge with a moisture content of 80%, and dry the sludge to obtain dried sludge with a moisture content of 3%. .

[0047] Step 2: Drying the clay naturally, crushing the muck and sludge in multiple stages, passing through a 50-mesh sieve, and storing for later use.

[0048] Step 3: mixing the sludge, slag, rice husk ash and sodium chloride uniformly according to a certain mass ratio to obtain a dry mixture, adding an appropriate amount of water and stirring evenly to obtain a wet mixture. Among them, 30 parts of sludge, 60 parts of clay, 10 parts of rice husk ash, 2 parts of sodium chloride and 20 parts of water are calculated by mass.

[0049] Step 4: Aging the wet mixture at a temperature of 20° C. and aging for more than 24 hours...

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Abstract

The invention provides a preparation method of a high-performance sintered insulation brick. The method comprises the following steps: step one, concentrating, pressing-filtering and drying sludge ofurban sewage treatment plant or sludge of the paper mill; step two, naturally airing, crushing, grinding and sieving the clay and sludge; step three, uniformly mixing various raw materials to obtain amixture drier, adding water to stir uniformly; step four, performing ageing treatment on the wet mixture, wherein the ageing time needs to exceed 24 hours; step five, performing compression molding on the brickmaking blank to obtain the green brick; step six, naturally drying the green brick under room temperature, and then feeding into a tunnel drying kiln to dry; step seven; directly feeding the green brick into a tunnel sintering kiln after the drying, wherein the sintering temperature is 950-1100 DEG C, wherein the heat preservation time of the brick body at the highest sintering temperature is 1-3 hours. The defects that the traditional insulation brick is poor in mechanical performance and high in heat conductivity are overcome; the production of the high-performance insulation brick with large sludge dosage is realized; the raw material sources are wide; the cost is low; various production and domestic sludge are greatly consumed.

Description

technical field [0001] The invention relates to the field of making sintered heat insulating bricks with sludge, rice husk ash, clay and sodium chloride, in particular to a method for preparing high performance sintered heat insulating bricks by adding sludge. Background technique [0002] In recent years, my country's urbanization has developed rapidly, and the amount of urban domestic sewage treatment has increased sharply. The sewage sludge produced contains a large amount of toxic and harmful substances such as organic matter, heavy metals, and bacterial pathogens. The sludge treatment methods currently used in China, such as: sludge landfill , Incineration, neither can achieve the harmless treatment of sludge, let alone realize the resource utilization of sludge. At present, the demand for building materials such as thermal insulation bricks continues to rise at home and abroad. The country has banned the production and use of clay solid bricks. The use of solid waste br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/32C04B33/132C04B33/13
CPCC04B38/0665C04B33/1321C04B33/32C04B33/132C04B33/131Y02P40/60
Inventor 董耀轩
Owner SOUTHEAST UNIV
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