Cordierite material prepared by waste activated alumina and preparation method thereof

A technology of activated alumina and cordierite, which is applied in the direction of solid waste removal, etc., to achieve important economic and environmental significance, significant economic and social benefits, and quick investment results.

Inactive Publication Date: 2009-11-18
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After searching, there is no report on the preparation of cordierite materials by using waste activated alumina in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The weight ratio of the raw material formula of this example: waste activated alumina is 20wt%, talc is 25wt%, and clay is 55wt%. The three raw materials were weighed according to the formula, placed in a ball mill for wet grinding for 24 hours, the ground slurry was filtered, dehydrated, dried and crushed, and the obtained grinding base was mixed with 6 wt% water, After the mixture is evenly mixed, the mixture is pressed into shape; the molded billet is dried at 100°C for 24 hours, and the dry billet is placed in a kiln for reaction and sintering at 1360°C. After 3 hours of heat preservation, it is cooled to room temperature to obtain a cordierite material; The cordierite content is 92.3wt%, the flexural strength is 60.2Mpa, and the bulk density is 2.12g / cm 3 , The porosity is 6.3%.

Embodiment 2

[0021] The weight ratio of the raw material formula of this example: waste activated alumina is 23wt%, talc is 24wt%, and clay is 53wt%. The three raw materials were weighed according to the formula, placed in a ball mill for wet grinding for 24 hours, the ground slurry was filtered, dehydrated, dried and crushed, and the obtained grinding base was mixed with 6 wt% water, After the mixture is evenly mixed, the mixture is pressed into shape; the molded billet is dried at 100°C for 24 hours, and the dry billet is placed in a kiln for reaction and sintering at 1380°C. After 4 hours of heat preservation, it is cooled to room temperature to obtain a cordierite material; The content of cordierite is more than 94.6wt%, the flexural strength is 62.5Mpa, and the bulk density is 2.25g / cm 3 , The porosity is 5.9%.

Embodiment 3

[0023] The weight ratio of the raw material formula of this example: waste activated alumina is 25wt%, talc is 26wt%, and clay is 49wt%. The three raw materials were weighed according to the formula, placed in a ball mill for wet grinding for 24 hours, the ground slurry was filtered, dehydrated, dried and crushed, and the obtained grinding material was mixed with 7wt% water in the grinding material. After the mixture is evenly mixed, the mixture is pressed into shape; the molded billet is dried at 100°C for 24 hours, and the dry billet is placed in a kiln for reaction and sintering at 1400°C. After 2 hours of heat preservation, it is cooled to room temperature to obtain a cordierite material; The content of cordierite is more than 96.4wt%, the flexural strength is 65.0Mpa, and the bulk density is 2.46g / cm 3 , The porosity is 5.5%.

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Abstract

The invention provides a cordierite material prepared by waste activated alumina and a preparation method thereof. The raw material formula mainly comprises the waste activated alumina, talcum and clay; and the preparation method comprises the following steps of: taking the waste activated alumina, the talcum and the clay as raw materials, mixing, pressing and forming the raw materials, leading the raw materials to react at high temperature, sintering and cooling the reaction products, thus obtaining the prepared titanate material. The material and the method are beneficial for waste utilization and solve the severe pollution of the waste activated alumina on the environment; the produced products have high-quality refractories which have high added value and no pollution, save the production cost, have obvious economic benefits and popularization and application values.

Description

technical field [0001] The invention relates to an ecological environment material, that is, comprehensive utilization of solid waste, and more particularly relates to a cordierite material prepared from waste activated alumina and a preparation method thereof. Background technique [0002] The chemical formula of cordierite is 2MgO·2A1 2 o 3 ·5SiO2 2 , with small thermal expansion coefficient, good thermal stability, volume stability and chemical stability, it is widely used in the development of special refractory materials, catalyst carriers, foam ceramics and electronic packaging materials. The conventional synthesis method is to use industrial alumina as the main raw material, and its cost is high. Activated alumina is widely used as a catalyst, activator, adsorbent, desiccant, etc. in the petroleum industry and chemical industry. For example, about 80% of various hydrogenation and reforming reactions in the petroleum industry use activated alumina. Used as a cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/622C04B35/66B09B3/00
Inventor 阮玉忠王成勇
Owner FUZHOU UNIV
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