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Porous refractory material and preparation method thereof

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

Inactive Publication Date: 2016-04-13
QINGDAO BAIJIANCHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

[0004] Fly ash is industrial waste discharged from thermal power plants. If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; cause harm

Method used

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Embodiment Construction

[0019] The present invention uses fly ash as the main raw material to prepare the porous refractory material. The main phases in the fly ash raw material are mullite and cristobalite, and the chemical composition mainly includes SiO2, Al 2 o 3 , CaO, Fe 2 o 3 , MgO, etc. Adding MgO-containing raw materials to fly ash can obtain forsterite phase. The present invention obtains MgO through magnesite and utilizes the CO produced by the decomposition reaction of magnesite at 700°C 2 The gas generated by the pyrolysis of the gas and the external pore-forming agent realizes the pore-forming. Obtaining the forsterite phase through the reaction of fly ash and MgO, and the CO produced by the decomposition of magnesite 2 The gas generated by the pyrolysis of the external pore-forming agent forms a pore structure in the matrix, thereby obtaining a porous refractory material.

[0020] 1. Porous refractory material, its raw material composition and weight percentage are: the addition o...

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Abstract

The invention relates to a porous refractory material and a preparation method, and relates to the technical field of refractor materials. The preparation method is characterized in that fly ash and a natural mineral material magnesite are adopted as main raw materials; and the porous refractory material is prepared through the processes such as blending and mixing, molding, drying, sintering and the like. Among the raw materials, the addition amount of fly ash is 10.0-90.0wt%, the addition amount of magnesite is 5.0-85.0wt%, the addition amount of a pore-forming agent is 5-15.0wt%, and the addition amount of a binding agent is 1-8wt%. A main phase of the porous refractory material prepared through high-temperature sintering is forsterite. The material has the characteristics of high porosity, low volume density, high strength, good thermal insulation effect, low cost and the like. According to the invention, a novel technical approach is provided for high-efficiency value-added exploitation of solid wastes such as fly ash and magnesite.

Description

technical field [0001] The invention relates to a porous 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 hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/66C04B35/622B09B3/00
Inventor 韩君昌
Owner QINGDAO BAIJIANCHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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