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Light fly ash ceramsite and preparation method thereof

A technology of fly ash ceramsite and fly ash, which is applied to ceramic products, clay products, and other household appliances. It can solve the problems of high packing density of ceramsite and low amount of fly ash, and achieve good cylinder compressive strength, The effects of protecting cultivated land, good economic benefits and environmental benefits

Active Publication Date: 2020-03-06
湖南中大再生资源与环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the technical shortcomings of the existing ceramsite raw materials such as low fly ash consumption and the high bulk density of the prepared ceramsite, the present invention provides a preparation method of light fly ash ceramsite, which aims to provide a method that can not only significantly improve The absorption capacity of fly ash and the preparation method of ultra-light ceramsite that can significantly reduce the bulk density

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  • Light fly ash ceramsite and preparation method thereof
  • Light fly ash ceramsite and preparation method thereof
  • Light fly ash ceramsite and preparation method thereof

Examples

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Effect test

Embodiment 1

[0052] With the fly ash of 80 weight parts, the kaolin of 15 weight parts, the diatomite of 5 weight parts and the expanded perlite that mixes 9% (based on the weight sum of fly ash, kaolin and diatom earth) The raw materials are stirred and mixed, and an appropriate amount of water is continuously added during the stirring process (the mass ratio of liquid to solid is 1:4) to ensure that the materials in the system are evenly mixed, and the pellets are granulated by a pelletizer to control the diameter fluctuation of the green pellets between 10-15mm. Then put the molded ceramsite into a drying oven at a temperature of 100°C and let it stand for 2 hours to obtain raw ceramsite. Then put the dried raw ceramsite into the muffle furnace, bake at 1220°C for 10-12 minutes, and cool naturally. properties such as strength and bulk density.

[0053] The bulk density of the obtained product is 338.25kg / m3, the cylinder compressive strength is 1.02MPa, the cylinder compressive strengt...

Embodiment 2

[0055] Compared with Example 1, the mass ratio of fly ash, kaolin and diatomite in the raw material is 76: 18: 6, and the usage amount of expanded perlite is the weight sum of fly ash, kaolin and diatomite 10% of. The bulk density of the prepared ceramsite is 352.24kg / m3, and the cylinder compressive strength is 1.31MPa.

Embodiment 3

[0057] Compared with Example 1, the mass ratio of fly ash, kaolin and diatomite in the raw material is 84: 12: 4, and the usage amount of expanded perlite is the weight sum of fly ash, kaolin and diatomite 9%. The bulk density of the prepared ceramsite is 343.13kg / m 3 , The cylinder compressive strength is 1.21MPa.

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Abstract

The invention belongs to the technical field of solid waste recycling, and particularly discloses a preparation method of light fly ash ceramsite, which comprises the following steps: mixing fly ash,kaolin, kieselguhr and expanded perlite raw material, pelletizing, and roasting the obtained green pellets at 1210-1230 DEG C to obtain the light fly ash ceramsite. Wherein the weight ratio of the flyash to the kaolin to the kieselguhr is (75-85): (12-18): (4-6); and the expanded perlite accounts for 7-12wt% of the sum of the weight of the fly ash, the kaolin and the kieselguhr. According to theinvention, the synergism of the components in percentage by weight is further matched with the control of the roasting temperature, so that the technical problems of high ceramsite bulk density and incapability of meeting the quality requirement of ultralight ceramsite caused by high-proportion fly ash can be solved, the bulk density of the prepared ceramsite can be unexpectedly and remarkably reduced, and the quality of the ultralight ceramsite can be improved, and the bulk density of the lightweight aggregate is superior to the relevant provisions of the Test Method for Lightweight AggregateGB / T17431.2-2010.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and specifically discloses a method for preparing lightweight ceramsite by utilizing fly ash. Background technique [0002] Fly ash is the main solid waste produced by coal-fired thermal power plants. According to the content of calcium oxide in fly ash, it can be divided into low-calcium ash and high-calcium ash. In the "13th Five-Year Plan" comprehensive work plan for energy conservation and emission reduction, it is proposed that by 2020, the comprehensive utilization rate of industrial solid waste will reach 73%. above. The "2016 Annual Fly Ash Industry Development Report" pointed out that the dominant position of my country's thermal power generation will not change for a period of time in the future. Combined with the forecast of the China Electricity Council, the production of fly ash in my country is expected to be 5.6% in the next five years. -610 million tons / year. How t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/08C04B38/00C04B33/135
CPCC04B38/08C04B38/009C04B33/1352Y02P40/60
Inventor 易龙生刘森刘涛许元洪赵伟赵立华
Owner 湖南中大再生资源与环保工程有限公司
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