A kind of ceramsite prepared by using domestic waste incineration ash sludge and its preparation method

A domestic waste incineration and ash technology, which is applied in the field of building materials, can solve the problems of occupying cultivated land, polluting water bodies and the atmosphere, and high water content, and achieves the effects of short product cycle, low cost, and low density

Active Publication Date: 2020-04-21
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high water content and small particle size of this part of ash sludge, if landfill is used, it will occupy a large amount of cultivated land and pollute water bodies and the atmosphere at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] formula:

[0024] Solid raw material (mass fraction): domestic waste incineration ash sludge 65%, fly ash 10%, clay 20%, expanded perlite 10%; solid raw material total mass 30% water.

[0025] Preparation:

[0026] (1) Grinding and pulverizing the solid raw materials domestic waste incineration ash sludge, fly ash, clay, and expanded perlite, using a 40-mesh sieve and a 60-mesh sieve, and retaining solid materials that pass through the 40-mesh sieve but not through the 60-mesh sieve;

[0027] (2) Take by weighing the solid raw material after step (1) sieves in proportion, stir and add in the ball-forming container;

[0028] (3) Spray water into the ball-forming container and continue to stir until the solid raw materials and water are completely mixed to form balls;

[0029] (4) Naturally air-dry at room temperature for 24 hours after forming into balls to obtain pellets;

[0030] (5) Sinter the ball particles in a muffle furnace, and raise the temperature from room ...

Embodiment 2

[0033] Solid raw material (mass fraction): domestic waste incineration ash sludge 65%, fly ash 10%, clay 20%, expanded perlite 5%; solid raw material total mass 20% water.

[0034] Preparation:

[0035] (1) Grinding and pulverizing the solid raw materials domestic waste incineration ash sludge, fly ash, clay, and expanded perlite, using a 40-mesh sieve and a 60-mesh sieve, and retaining solid materials that pass through the 40-mesh sieve but not through the 60-mesh sieve;

[0036] (2) Take by weighing the solid raw material after step (1) sieves in proportion, stir and add in the ball-forming container;

[0037] (3) Spray water into the ball-forming container and continue to stir until the solid raw materials and water are completely mixed to form balls;

[0038] (4) Naturally air-dry at room temperature for 24 hours after forming into balls to obtain pellets;

[0039] (5) Sinter the ball particles in a muffle furnace, and raise the temperature from room temperature to 1140°...

Embodiment 3

[0042] Solid raw material (mass fraction): domestic waste incineration ash sludge 75%, fly ash 10%, clay 10%, expanded perlite 5%; solid raw material total mass 30% water.

[0043] Preparation:

[0044] (1) Grinding and pulverizing the solid raw materials domestic waste incineration ash sludge, fly ash, clay, and expanded perlite, using a 40-mesh sieve and a 60-mesh sieve, and retaining solid materials that pass through the 40-mesh sieve but not through the 60-mesh sieve;

[0045] (2) Take by weighing the solid raw material after step (1) sieves in proportion, stir and add in the ball-forming container;

[0046] (3) Spray water into the ball-forming container and continue to stir until the solid raw materials and water are completely mixed to form balls;

[0047] (4) Naturally air-dry at room temperature for 24 hours after forming into balls to obtain pellets;

[0048] (5) Sinter the ball particles in a muffle furnace, and raise the temperature from room temperature to 1170°...

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Abstract

The invention discloses a ceramsite prepared by utilizing municipal waste incineration ash residue sludge and a preparation method thereof. The ceramsite is mainly prepared from the following solid raw materials in percentage by mass: 60 to 75% of municipal waste incineration ash residue sludge, 10 to 15% of fly ash, 10 to 30 parts of clay and 5 to 10% of expanded perlite. Besides the solid raw materials, water which accounts for 20 to 40% of the total mass of the solid raw materials is also added. The ceramsite disclosed by the invention is mainly prepared from the municipal waste incineration ash residue sludge, so that the wastes are turned into treasures and are used as resources. The prepared ceramsite meets a standard requirement on a lightweight aggregate and a testing method of the lightweight aggregate, is high in strength and is small in density; meanwhile, the preparation method disclosed by the invention is simple and convenient, the cost is low, the sources of raw materials are wide, and the period of a finished product is short.

Description

technical field [0001] The invention relates to building materials, in particular to a ceramsite prepared from domestic waste incineration ash sludge and a preparation method thereof. Background technique [0002] With the rapid development of domestic waste incineration power generation treatment technology in China, the amount of domestic waste incineration is increasing. Municipal domestic waste will produce incineration ash after incineration, and the mass of general incineration ash is 5-30% of the total mass before incineration, of which bottom ash accounts for 15%-25%. Based on the calculation of 30 million tons of waste disposal, about 225,000 tons to 2.25 million tons of bottom ash will be generated nationwide. At present, the use and treatment of incineration ash is mainly to prepare unburned bricks, but in the process of preparing incinerated ash unburned bricks, a certain amount of residues - ash sludge will be produced, accounting for about 10% of the total amo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/135C04B33/13
CPCC04B33/13C04B33/1352C04B33/1357C04B2235/3427C04B2235/77C04B2235/96Y02P40/60
Inventor 刘荣许一凡许福建顾忠
Owner NANJING NORMAL UNIVERSITY
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