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Sludge and shale thermal insulation microporous brick and preparation method thereof

A shale and sludge technology, which is applied in the field of sludge shale thermal insulation microporous bricks and its preparation, can solve problems such as environmental and human health threats, air and water pollution, and potential safety hazards, and achieve low drying shrinkage, Effects of environmental load reduction, good mechanical properties and thermal insulation properties

Active Publication Date: 2018-11-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coal gangue contains a large amount of sulfide, and its escape or leaching will cause air and water pollution, posing a serious threat to the environment and human health
At the same time, there is a risk of spontaneous combustion of coal gangue, which poses a great safety hazard

Method used

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  • Sludge and shale thermal insulation microporous brick and preparation method thereof
  • Sludge and shale thermal insulation microporous brick and preparation method thereof
  • Sludge and shale thermal insulation microporous brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of sludge shale thermal insulation microporous brick, comprising the following steps:

[0030] S1: Put the sludge with a moisture content of more than 90% from the sewage treatment plant in the drying plant, turn it over for 3 days, and then dry the sludge to make the moisture content lower than 10%, and obtain the sludge block;

[0031] S2: Put shale, sludge, and coal gangue in three-stage crushers of jaw crusher, hammer crusher, and fine crusher to obtain shale particles, sludge particles, and coal gangue particles, and the particle size is less than 5mm ;

[0032] S3: Mix the shale particles, sludge particles, and coal gangue particles with a mass ratio of 75%, 15%, and 10% in terms of absolute dry mass conversion, and then sieve the mixture powder after grinding in a planetary ball mill for 15-20 minutes ; After grinding, the powder is sieved in a 2mm sieve and a 0.2mm sieve for the first time and the second time. and the secondary sieved powd...

Embodiment 2

[0041] A preparation method of sludge shale thermal insulation microporous brick, comprising the following steps:

[0042] S1: Put the sludge with a moisture content of more than 90% from the sewage treatment plant in the drying plant, turn it over for 3 days, and then dry the sludge to make the moisture content lower than 10%, and obtain the sludge block;

[0043] S2: Put shale, sludge, and coal gangue in three-stage crushers of jaw crusher, hammer crusher, and fine crusher to obtain shale particles, sludge particles, and coal gangue particles, and the particle size is less than 5mm ;

[0044] S3: Mix the shale particles, sludge particles, and coal gangue particles at a mass ratio of 70%, 15%, and 15% after absolute dry mass conversion, and then grind them in a planetary ball mill for 15-20 minutes and sieve to obtain a mixture powder ; After grinding, the powder is sieved in a 2mm sieve and a 0.2mm sieve for the first time and the second time. and the secondary sieved powd...

Embodiment 3

[0053] A preparation method of sludge shale thermal insulation microporous brick, comprising the following steps:

[0054] S1: Put the sludge with a moisture content of more than 90% from the sewage treatment plant in the drying plant, turn it over for 3 days, and then dry the sludge to make the moisture content lower than 10%, and obtain the sludge block;

[0055] S2: Put shale, sludge, and coal gangue in three-stage crushers of jaw crusher, hammer crusher, and fine crusher to obtain shale particles, sludge particles, and coal gangue particles, and the particle size is less than 5mm ;

[0056] S3: Mix the shale particles, sludge particles, and coal gangue particles with a mass ratio of 70%, 20%, and 10% after conversion according to the absolute dry mass, and then grind them in a planetary ball mill for 15-20 minutes and sieve to obtain a mixture powder ; After grinding, the powder is sieved in a 2mm sieve and a 0.2mm sieve for the first time and the second time. and the se...

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Abstract

The invention relates to a sludge and shale thermal insulation microporous brick and a preparation method thereof. The sludge and shale thermal insulation microporous brick is prepared from the following raw materials in percentage by mass: 70%-75% of shale, 15%-20% of sludge and 5%-15% of coal gangue, and carboxymethyl cellulose sodium, the mass of which is 0.5% of the total mass of the mixture,is added. The preparation method comprises the steps of raw material crushing, mixing in ratio, raw material grinding, secondary sieving, particle size ratio-based mixing, test molding moisture content, water mixing, aging curing, multi-stage drying, raw material thermal property testing, setting roasting stage, and green body roasting. With the shale, sludge, coal gangue and admixture, the resource utilization of sludge and coal gangue in the sintered brick is realized, the sludge and coal gangue are recycled to reduce the environmental load, and are used together as a pore-forming agent forthe sintered brick to enable the sintered brick to have the characteristics of light weight, heat insulation, sound absorption and noise reduction.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a sludge shale thermal insulation microporous brick and a preparation method thereof. Background technique [0002] With the acceleration of urbanization in our country, the continuous expansion of urban scale and the rapid increase of urban population, the discharge of sludge generated by industry and daily life has increased rapidly, and the pressure on sludge treatment is increasing. The environmental protection treatment and resource utilization of sludge has become a hot spot. The loss on ignition of the sludge can reach 50%, and it has the potential to be used as a pore-forming agent for fired bricks. At high temperature, the organic matter in the sludge volatilizes, leaving pores in the original position, forming a porous structure, which is beneficial to improving the thermal insulation performance of sintered bricks. In addition, clay, one of the main raw materials of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/13C04B33/132C04B33/32
CPCC04B33/13C04B33/132C04B33/1321C04B33/32C04B38/0665C04B2235/6562C04B2235/96C04B2235/9607C04B38/0645C04B38/0067Y02P40/60
Inventor 吴凯张林涛苏宇峰宋锡铭李响
Owner TONGJI UNIV
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