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Fly ash-based mullite closed-cell ceramic and preparation method thereof

A technology of fly ash and mullite, which is applied in the field of fly ash-based mullite closed-cell ceramics and its preparation, can solve the problems of high thermal conductivity, low closed porosity of materials, unfavorable thermal insulation and other problems, and achieve high strength High efficiency, simple operation and good comprehensive performance

Active Publication Date: 2018-12-07
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to produce ceramic materials with high closed porosity by adding pore-forming agents. The obtained materials have low closed porosity and high thermal conductivity, which is not conducive to thermal insulation

Method used

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  • Fly ash-based mullite closed-cell ceramic and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of fly ash-based mullite closed-cell ceramics, the components are proportioned by mass, fly ash clinker: high alumina bauxite: ammonium bicarbonate: potassium feldspar=100:100:5:10.

[0037] A preparation method of fly ash-based mullite closed-cell ceramics, the process flow chart is as follows figure 1 shown, proceed as follows:

[0038] Step 1: Raw material pretreatment

[0039] (1) Put the fly ash in a box-type resistance wire furnace and calcinate at 1000°C for 5 hours to obtain fly ash clinker with good stability;

[0040] (2) According to the component distribution ratio of mullite, high-alumina vanadium soil is prepared; wherein, the quality of high-alumina clay is the same as that of fly ash clinker;

[0041] Step 2: Weighing and mixing

[0042] Weigh fly ash clinker, high alumina bauxite, ammonium bicarbonate and potassium feldspar according to the mass ratio of 100:100:5:10, mix and hand grind in an agate crucible for 30 minutes to obtain a mixed mat...

Embodiment 2

[0048] A fly ash-based mullite closed-cell ceramic, the components are proportioned by mass, fly ash clinker: high alumina bauxite: silicon carbide: potassium feldspar=100:100:5:10.

[0049] A preparation method of fly ash-based mullite closed-cell ceramics, the process flow chart is as follows figure 1 shown, proceed as follows:

[0050] Step 1: Raw material pretreatment

[0051] (1) Put the fly ash in a box-type resistance wire furnace and calcinate at 1000°C for 5 hours to obtain fly ash clinker with good stability;

[0052] (2) According to the component distribution ratio of mullite, high-alumina vanadium soil is prepared; wherein, the quality of high-alumina clay is the same as that of fly ash clinker;

[0053] Step 2: Weighing and mixing

[0054] Weigh fly ash clinker, high alumina vanadium, silicon carbide and potassium feldspar according to the mass ratio of 100:100:5:10, mix and hand grind in an agate crucible for 30 minutes to obtain a mixed material;

[0055] S...

Embodiment 3

[0060] A fly ash-based mullite closed-cell ceramic, the components are proportioned by mass, fly ash clinker: alumina powder: ammonium bicarbonate: potassium feldspar=100:100:5:10.

[0061] A preparation method of fly ash-based mullite closed-cell ceramics, the process flow chart is as follows figure 1 shown, proceed as follows:

[0062] Step 1: Raw material pretreatment

[0063] (1) Put the fly ash in a box-type resistance wire furnace and calcinate at 1000°C for 5 hours to obtain fly ash clinker with good stability;

[0064] (2) According to the component distribution ratio of mullite, high-alumina vanadium soil is prepared; wherein, the quality of high-alumina clay is the same as that of fly ash clinker;

[0065] Step 2: Weighing and mixing

[0066] Weigh fly ash clinker, alumina powder, ammonium bicarbonate and potassium feldspar according to the mass ratio of 100:100:5:10, mix and hand grind in an agate crucible for 30 minutes to obtain a mixed material;

[0067] Step 3...

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Abstract

The invention provides fly ash-based mullite closed-cell ceramic and a preparation method thereof. The closed-cell ceramic is prepared from the following components: fly ash clinker, a correcting agent, a pore forming material and a fluxing agent in a mass ratio of 100:(100-200):(0-15):(10-20). The preparation method comprises the following steps: 1, calcining fly ash to obtain the fly ash clinker; 2, uniformly mixing the raw materials in the mass ratio to prepare a uniform mixture; 3, performing dry-pressing molding on the uniform mixture, sufficiently drying the molded material, sintering ina high-temperature furnace, and insulating for a period to prepare the fly ash-based mullite closed-cell ceramic. The fly ash-based mullite closed-cell ceramic is economical and environment-friendlyin raw material application, has a simple and feasible method operation and is convenient for industrial production, the closed porosity of the mullite closed-cell ceramic can be improved, the thermalconductivity of the ceramic can be reduced, and the tensile strength of the mullite ceramic can be improved. The fly ash-based mullite closed-cell ceramic has excellent comprehensive performance andwide application prospect.

Description

Technical field: [0001] The invention belongs to the technical field of high-value utilization of industrial solid waste resources, and in particular relates to a fly ash-based mullite closed-cell ceramic and a preparation method thereof. Background technique: [0002] Most of the buildings in our country use organic thermal insulation materials, which have the advantages of light weight, good thermal insulation effect, and easy processing. However, organic thermal insulation materials are low in strength, easy to burn, and poor in eco-environmental protection. Therefore, inorganic thermal insulation materials are a new research direction in the field of wall thermal insulation materials. Compared with developed countries, the research and development of inorganic thermal insulation materials in my country is relatively backward. At present, China's industry and agriculture are booming and facing the problem of increasing environmental pollution. Therefore, how to use chea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B38/02C04B35/64
CPCC04B35/185C04B35/64C04B38/02C04B2235/3472C04B2235/96C04B2235/9607C04B38/0061C04B38/0074
Inventor 马北越苏畅吴桦张亚然任鑫明高陟于景坤
Owner NORTHEASTERN UNIV
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