A kind of preparation method of high-performance sintered insulation brick

A high-performance technology for insulating bricks, which is applied in the field of preparing high-performance sintered insulating bricks by adding sludge. It can solve the problems of low strength and poor thermal insulation performance, and achieve the effects of increasing porosity, reducing sintering shrinkage, and easy mechanized operation.

Active Publication Date: 2022-04-12
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 added water are calculated by mass.

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

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Abstract

The invention provides a method for preparing high-performance sintered heat insulating bricks, which comprises the following steps: step 1, sludge from urban domestic sewage treatment plants or paper mill sludge is concentrated, filtered and dried; step 2, clay, sludge Carry out natural drying, crushing, crushing and sieving; step 3, mix the raw materials evenly to obtain the dry mixture, add water and stir evenly; step 4, carry out aging treatment on the wet mixture, and the aging time should exceed 24h; step 5 1. The brick blanks are molded to obtain bricks; step 6, the bricks are dried naturally at room temperature and then sent to the tunnel drying kiln for drying; step 7, after drying, the bricks are directly sent to the tunnel sintering kiln, the sintering temperature is 950 ~ 1100 ℃, The holding time of the brick body at the highest sintering temperature is 1 to 3 hours. The invention overcomes the disadvantages of poor mechanical properties and high thermal conductivity of traditional thermal insulation bricks, and realizes the production of high-performance thermal insulation bricks with a large amount of sludge; the source of raw materials is wide, the cost is low, and various production and domestic sludges are consumed in large quantities.

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 Patents(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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