Cordierite porous fireproofing material and preparation method thereof

A technology of refractory materials and porous materials, applied in the field of refractory materials, can solve the problems of human body and biological hazards, dust generation, air pollution, etc., and achieve the effects of low raw material cost, strong market competitiveness, and simple process equipment.

Inactive Publication Date: 2010-12-29
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Fly ash is industrial waste discharged from thermal power plants. If a large amoun

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] 2. The preparation method of cordierite porous refractory material, the specific process is as follows:

[0021] Firstly, mix the fly ash, magnesite, pore-forming agent and binder according to a certain ratio, then put them into a ball mill and mill them for 0.1h-24h until they are evenly mixed. The method of ball milling can be dry ball milling or wet ball milling, wherein the ball milling medium can be metal balls, ceramic balls or agate balls, etc., and the ball milling fluid for wet ball milling can be water or absolute ethanol. Then the homogeneously mixed raw materials are processed into a green body through molding and drying processes, wherein the molding process can be dry pressing molding, semi-dry pressing molding and casting molding.

[0022] Then, the above-mentioned dried green body is placed in a thermal kiln to realize the firing process, wherein the thermal kiln can be an electric furnace, a muffle gas kiln, a coal-fired kiln or an oil-fired kiln, or a ...

Embodiment 1

[0025] The cordierite porous refractory material is prepared by using fly ash as the main raw material, adding magnesite, adding starch as the pore-forming agent, and adding silica sol as the binder.

[0026] Raw material ratio is:

[0027] The amount of fly ash added is 75.0wt%, and the maximum particle size is <300μm; the amount of magnesite added is 25.0wt%, and the maximum particle size is <300μm; The addition amount of the binder silica sol is 2.5wt%.

[0028] A method for preparing a cordierite porous refractory material, the specific process is as follows:

[0029] Ingredients, mix:

[0030] First, mix fly ash, magnesite, pore-forming agent and binder according to a certain ratio, then put them into a ball mill and mill them for 12 hours until they are evenly mixed, and the maximum particle size is <300 μm. The ball milling method is wet ball milling, and drinking water is used as ball milling. liquid.

[0031] forming:

[0032] The homogeneously mixed raw material...

Embodiment 2

[0037] The cordierite porous refractory material is prepared by using fly ash as the main raw material, adding magnesite to it, adding sawdust as a pore-forming agent, and adding phenolic resin as a binder.

[0038] Raw material ratio is:

[0039] The amount of fly ash added is 80.0wt%, and the maximum particle size is <300μm; the amount of magnesite added is 20.0wt%, and the maximum particle size is <300μm; the addition of pore-forming agent wood chips is 8.0wt%, and the maximum particle size is <300μm; The added amount of phenolic resin is 2.0wt%.

[0040] A method for preparing a cordierite porous refractory material, the specific process is as follows:

[0041] Ingredients, mix:

[0042] Firstly, fly ash, magnesite, pore-forming agent and binder are mixed according to a certain ratio, and then put into a ball mill and milled for 15 hours until the mixture is uniform, and the maximum particle size is less than 300 μm. The method of ball milling is dry ball milling.

[00...

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Abstract

The invention relates to a cordierite porous fireproofing material and a preparation method thereof, belonging to the technical field of fireproofing materials. The invention is characterized in that coal ash and natural raw mineral material magneiste or tailing thereof are main raw materials, and the cordierite porous fireproofing material is prepared by burdening, mixing, forming, drying, sintering and other technical processes. In the raw material proportion of the invention, the addictive amount of the coal ash is 2.0%-99.0% by weight and the addictive amount of the magneiste is 1.0-96.0% by weight; and in addition, the addictive amount of pore-forming agent is 0.0%-20.0% by weight and the addictive amount of binding agent is 0.1%-10.0% by weight. A main phase of the porous fireproofing material prepared at high temperature is cordierite and forsterite, which has the characteristics of high porosity, small volume density, high strength, good heat insulation, low cost and the like. The invention provides a brand new technical way for high-efficiency value-added utility of solid waste materials and gioberite such as the coal ash.

Description

Technical field [0001] The invention relates to a cordierite refractory material and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] Clay refractory bricks are widely used in thermal equipment and industrial kiln insulation, but they have poor thermal shock resistance, low refractoriness, low strength, high production energy consumption, and large consumption of refractory clay resources. question. In order to improve the clay brick's excellent thermal shock resistance and high temperature performance, it is necessary to use high-quality mineral raw materials and generally fire at a high temperature of about 1500 ° C, and the production cost is relatively high. In January 2010, my country issued a notice on taking comprehensive measures to control the mining of refractory clay and fluorite, which may further restrict the use of high-quality clay mineral raw materials to produce high-performance clay-based...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/195C04B35/622
Inventor 王琦欧阳欣黄朝晖房明浩刘艳改徐友果
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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