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Light and porous sludge ceramisite and preparation method thereof

A sludge ceramsite, lightweight technology, applied to ceramic products, clay products, and other household appliances, can solve the problems of light weight and strength, achieve good void ratio, simple preparation method, and protect the environment

Inactive Publication Date: 2016-09-21
郑州德赛尔陶粒有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, sludge ceramsite is a kind of ceramsite with sludge produced in sewage treatment plants as the main raw material, but the current sludge ceramsite still has the difficulty of taking into account the requirements of lightness and strength at the same time

Method used

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  • Light and porous sludge ceramisite and preparation method thereof
  • Light and porous sludge ceramisite and preparation method thereof
  • Light and porous sludge ceramisite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The lightweight porous sludge ceramsite of the present embodiment comprises the following raw materials in parts by weight: 10 parts of sawdust, 25 parts of fly ash, 5 parts of silica fume, 40 parts of sludge, 10 parts of quicklime, 20 parts of red mudstone, 1 part of phosphogypsum and 8 parts of magnesite.

[0025] The preparation method of the lightweight porous sludge ceramsite of the present embodiment may further comprise the steps:

[0026] (1) magnesite, red mudstone and sawdust are pulverized respectively, and cross 200 mesh sieves;

[0027] (2) Dewater the sludge to reduce the water content of the sludge to 25%; then add fly ash, silica fume, quicklime, phosphogypsum and crushed and sieved sawdust, magnesite and red mudstone, and mix well , compressed into granules;

[0028] (3) aging the particles in step (2) for 24 hours at room temperature;

[0029] (4) Raise the temperature to 180°C at a rate of 5°C / min, hold for 60 minutes, then raise the temperature to...

Embodiment 2

[0031] The lightweight porous sludge ceramsite of the present embodiment comprises the following raw materials in parts by weight: 20 parts of sawdust, 30 parts of fly ash, 8 parts of silica fume, 35 parts of sludge, 12 parts of quicklime, 30 parts of red mudstone, 3 parts of desulfurized gypsum and 10 parts of magnesite.

[0032] The preparation method of the lightweight porous sludge ceramsite of the present embodiment may further comprise the steps:

[0033] (1) magnesite, red mudstone and sawdust are pulverized respectively, and cross 200 mesh sieves;

[0034] (2) Dewater the sludge to reduce the water content of the sludge to 30%; then add fly ash, silica fume, quicklime, desulfurized gypsum, crushed and sieved sawdust, magnesite and red mudstone, and mix well , compressed into granules;

[0035] (3) aging the particles in step (2) for 25 hours at room temperature;

[0036] (4) Raise the temperature to 220°C at a rate of 10°C / min, hold for 30 minutes, then raise the te...

Embodiment 3

[0038] The lightweight porous sludge ceramsite of the present embodiment comprises the following raw materials in parts by weight: 25 parts of sawdust, 20 parts of fly ash, 10 parts of silica fume, 30 parts of sludge, 15 parts of quicklime, 25 parts of red mudstone, Phosphogypsum 5 parts and magnesite 5 parts.

[0039] The preparation method of the lightweight porous sludge ceramsite of the present embodiment may further comprise the steps:

[0040] (1) magnesite, red mudstone and sawdust are pulverized respectively, and cross 200 mesh sieves;

[0041] (2) Dewater the sludge to reduce the water content of the sludge to 30%; then add fly ash, silica fume, quicklime, phosphogypsum, crushed and sieved sawdust, magnesite and red mudstone, and mix well , compressed into granules;

[0042] (3) aging the granules in step (2) for 30 hours at room temperature;

[0043] (4) Raise the temperature to 200°C at a rate of 8°C / min, hold for 45 minutes, then raise the temperature to 650°C a...

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Abstract

The invention discloses light and porous sludge ceramisite and a preparation method thereof. The sludge ceramisite is prepared from raw materials in parts by weight as follows; 10-25 parts of saw dust, 20-30 parts of fly ash, 5-10 parts of silica fume, 30-40 parts of sludge, 10-15 parts of quick lime, 20-30 parts of red mudstone, 1-5 parts of gypsum and 5-10 parts of magnesite. The sludge ceramisite is prepared with sludge produced in a municipal sewage plant as a main raw material, fly ash, red mudstone and gypsum as main addition raw materials and quick lime, saw dust, silica fume and magnesite as additives, and good porosity, high cylindrical compress strength, a high softening coefficient, a high water absorption rate and low loss on ignition of the sludge ceramisite can be further guaranteed on the basis that the light-weight property is guaranteed. The preparation method of the sludge ceramisite is simple, raw materials are widely sourced, waste can be turned into wealth, environmental protection is realized, reutilization of sludge resources in the sewage treatment plant is realized, and the sludge ceramisite has good social and economic benefits.

Description

technical field [0001] The invention relates to a light porous sludge ceramsite and a preparation method thereof, belonging to the technical field of solid waste treatment and resource utilization. Background technique [0002] Sludge is a kind of solid waste produced in the sewage treatment process that is very harmful to human body and environment. With the acceleration of urbanization in our country, the amount of sludge produced is increasing. Its high moisture content, large volume, and poor mechanical properties make it difficult to stack and transport, and the sludge contains a large amount of toxic substances. If it cannot be properly disposed of, it will bring serious environmental problems. At present, the mature sludge treatment methods include: sanitary landfill, land use, drying and incineration, etc., but these methods have their own shortcomings, so it is of great significance to study a new sludge treatment method. [0003] Ceramsite is a kind of ceramic pa...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B33/135C04B33/138C04B33/132
CPCC04B33/132C04B33/1321C04B33/1352C04B33/138C04B38/009C04B2235/3206C04B2235/3208C04B2235/96C04B38/0675C04B38/0074Y02P40/60
Inventor 张建军
Owner 郑州德赛尔陶粒有限公司
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