Production method of microcrystalline mullite type calcined kaolin, obtained product and application

A technology of calcined kaolin and microcrystalline mullite, which is applied in the production field of microcrystalline mullite type calcined kaolin and microcrystalline mullite type calcined kaolin, which can solve the problems of poor quality, limited application and high whiteness of calcined kaolin Calcined kaolin cannot use high-speed iron raw materials to achieve the effects of facilitating air circulation, improving economic benefits, and increasing effective space
CN111018488AActive Publication Date: 2020-04-17山西超牌煅烧高岭土有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
山西超牌煅烧高岭土有限公司
Publication Date
2020-04-17

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Abstract

The invention discloses a production method of microcrystalline mullite type calcined kaolin, the prepared microcrystalline mullite type calcined kaolin and application of the microcrystalline mullitetype calcined kaolin. The method comprises the following steps: 1) taking high-iron coal gangue with Fe2O3 content of more than or equal to 0.4% as a raw material; adjusting to enable Al2O3 content in the raw materials to be greater than or equal to 30%; (2) crushing and grinding the raw materials obtained in the step (1) to 100 meshes or above to obtain a mixed powder, (3) adding water into themixed powder, uniformly mixing to prepare a wet material, carrying out ageing and mud extruding to prepare bricks, stacking the bricks on a kiln car, drying, and calcining the kiln car in a tunnel kiln at 800-1350 DEG C to obtain the microcrystalline mullite type calcined kaolin. The calcined kaolin product prepared by the production method of the microcrystalline mullite type calcined kaolin is high in whiteness, uniform in chemical components and stable in microstructure, contains a large amount of mullite microcrystals, and is a preferred raw material for ceramic glaze, high-quality clay bricks, light mullite bricks and ceramic fiber cotton.
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Description

Technical field

[0001] The invention relates to the technical field of mineral processing, in particular to a method for producing microcrystalline mullite calcined kaolin. In addition, the present invention also relates to a microcrystalline mullite-type calcined kaolin prepared by the above-mentioned production method of microcrystalline mullite-type calcined kaolin and its application. Background technique

[0002] my country is the world's largest coal-producing country. While producing coal, it produces a large amount of coal gangue associated with coal. For a long time, coal gangue has been dumped or buried as waste, which wastes resources, takes up land and pollutes the environment. In fact, research has found that the main component of coal gangue produced in my country’s main coal-producing areas is coal-measure kaolin, which is a unique kaolin resource in my country. It can be used to prepare kaolin products for papermaking, ceramic production, and preparation. Refract...

Claims

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