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Light high-strength high mixing amount coal ash ceramsite and preparation method thereof

A technology of fly ash ceramsite and high content, applied in the field of solid waste resource utilization, can solve the problems of single bulk density, low thermal conductivity, high water absorption, etc., and achieve high activation performance, low density, and low water absorption Effect

Inactive Publication Date: 2017-12-01
GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the existing fly ash ceramsite problems such as low ball forming rate, low strength, high water absorption and relatively single bulk density, plasticizers, foaming agents, fluxes and reinforcing agents are added to fly ash to create Lightweight, high-strength, low thermal conductivity, high refractoriness, good chemical stability, durability, and good thermal insulation and sound insulation properties

Method used

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  • Light high-strength high mixing amount coal ash ceramsite and preparation method thereof
  • Light high-strength high mixing amount coal ash ceramsite and preparation method thereof
  • Light high-strength high mixing amount coal ash ceramsite and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] 1. Raw materials: fly ash 950g, activated bentonite 10g, silicon carbide 2g, coal powder 18g, feldspar 10g, manganese powder 10g

[0040] The composition of fly ash is LOI 5%: SiO 2 499.5g, Al 2 o 3 190.5g, CaO30.8g, Fe 2 o 3 39.2g, MgO 95g, TiO 2 95g

[0041] 2. Preparation method:

[0042] a. Mixing: take the raw materials and fully mix them to form a mixture;

[0043] b. Granulation: granulate the mixture to form granules;

[0044] c. Drying: Dry the particles at a temperature of 300°C;

[0045] d. Sintering: pass the dried particles through a certain sintering process, and sinter for 70 minutes;

[0046] e. Finished product: the sintered granules are cooled to room temperature to obtain the finished light-weight high-strength ceramsite.

Embodiment 2

[0048] 1. Raw materials: fly ash 900g, activated bentonite 20g, silicon carbide 5g, coal powder 25g, feldspar 25g, manganese powder 25g

[0049] The composition of the fly ash is 2% of the loss on ignition: SiO 2 270.3g, Al 2 o 3 450.5g, CaO 45.2g, Fe 2 o 3 45g, MgO 71g, TiO 2 18g

[0050] 2. Preparation method:

[0051] a. Mixing: take the raw materials and fully mix them to form a mixture;

[0052] b. Granulation: granulate the mixture to form granules;

[0053] c. Drying: Dry the particles at a temperature of 260°C;

[0054] d. Sintering: pass the dried particles through a certain sintering process, and sinter for 60 minutes;

[0055] e. Finished product: the sintered granules are cooled to room temperature to obtain the finished light-weight high-strength ceramsite.

Embodiment 3

[0057] 1. Raw material: fly ash 820g, activated bentonite 30g, silicon carbide 10g, coal powder 30g, feldspar 60g, manganese powder 50g

[0058] The composition of the fly ash is 7% of the loss on ignition: SiO 2 328.3g, Al 2 o 3 246.3g, CaO 82.4g, Fe 2 o 3 79g, MgO 64g, TiO 2 20g

[0059] 2. Preparation method:

[0060] a. Mixing: take the raw materials and fully mix them to form a mixture;

[0061] b. Granulation: granulate the mixture to form granules;

[0062] c. Drying: Dry the particles at a temperature of 200°C;

[0063] d. Sintering: pass the dried particles through a certain sintering process, and sinter for 50 minutes;

[0064]e. Finished product: the sintered granules are cooled to room temperature to obtain the finished light-weight high-strength ceramsite.

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Abstract

The invention provides light high-strength high mixing amount coal ash ceramsite and a preparation method thereof. The ceramsite comprises the following components in parts by mass: 70-95 parts of coal ash, 1-5 parts of a plasticizer, 0-5 parts of a foaming agent, 0-10 parts of a fluxing agent and 0-10 parts of a reinforcing agent. The coal ash ceramsite provided by the invention is light in weight and high in strength, the density grade is as high as 600-900kg / m<3>, the cylinder pressure intensity is as high as 7-15MPa, the water absorption rate is as low as 3-5%, and damage is not easily caused; the coal ash ceramsite can be used for preparing lightweight aggregate high-performance concrete, building wall plates, bridges and pipelines; the coal ash ceramsite is relatively lowly required in Lightweight Aggregates and Its Testing Methods Part I: Lightweight Aggregates, the strength requirement of high-strength ceramsite of which the density range is 600-900kg / m<3> is 4-6.5MPa, and the water absorption rate is generally less than 20%.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste, in particular to a light-weight, high-strength, high-volume fly ash ceramsite and a preparation method thereof Background technique [0002] Fly ash collected in coal-fired flue gas is the main solid waste discharged from coal-fired power plants, mainly from thermal power plants that use pulverized coal as fuel and coal-fired boilers for central heating in cities. With the rapid development of the electric power industry, the discharge of fly ash from coal-fired power plants is increasing year by year. Fly ash will pollute the environment with dust, discharge into the water system will silt the river, and the harmful chemicals in it will also cause serious harm to the human body and other organisms. . [0003] Fly ash ceramsite with fly ash as the main raw material is a light aggregate made of a small amount of clay or other bonding materials as a binder, which is gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B38/02
CPCC04B18/027C04B38/009C04B2235/3267C04B2235/3463C04B2235/36C04B2235/77C04B2235/96C04B18/023C04B18/08C04B14/104C04B14/22C04B14/041C04B14/30C04B33/1352C04B38/02
Inventor 贾屹海王希宏陈思颖
Owner GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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