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Aluminium titanate material prepared by waste activated alumina and preparation method thereof

A technology of activated alumina and aluminum titanate, which is applied in the direction of solid waste removal, etc., to achieve the effects of significant economic and social benefits, quick investment, and no investment risk.

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 aluminum titanate materials by using waste activated alumina in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The weight ratio of the raw material formula of this example: waste activated alumina is 57wt%, titanium dioxide is 43wt%. The two raw materials are weighed according to the formula, placed in a ball mill for wet grinding for 24 hours, the ground slurry is filtered, dehydrated, dried and crushed, and the obtained grinding material is mixed by adding 6 wt% water to 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 1490°C. After 2 hours of heat preservation, it is cooled to room temperature to obtain an aluminum titanate material, of which titanium The content of acid aluminum is 94.3wt%, the flexural strength is 17.5Mpa, and the bulk density is 3.01g / m 3 , The porosity is 12.3%.

Embodiment 2

[0020] The weight ratio of the raw material formula in this example: waste activated alumina is 59wt%, and titanium dioxide is 41wt%. The two raw materials are weighed according to the formula, placed in a ball mill for wet grinding for 24 hours, the ground slurry is filtered, dehydrated, dried and crushed, and the obtained grinding material is mixed by adding 6 wt% water to the grinding material. After the mixture is evenly mixed, the mixture is pressed and molded; 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 1450°C. After 3 hours of heat preservation, it is cooled to room temperature to obtain aluminum titanate material, titanic acid The content of aluminum is 92.5wt%, the flexural strength is 16.2Mpa, and the bulk density is 2.95g / cm 3 , The porosity is 14.1%.

Embodiment 3

[0022] The weight ratio of the raw material formula in this example: waste activated alumina is 61wt%, and titanium dioxide is 39wt%. The two raw materials are weighed according to the formula, placed in a ball mill for wet grinding for 24 hours, the ground slurry is filtered, dehydrated, dried and crushed, and the obtained grinding material is mixed by adding 6 wt% water to 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 1430°C. After 4 hours of heat preservation, it is cooled to room temperature to obtain an aluminum titanate material, of which titanium The content of acid aluminum is 91.7wt%, the flexural strength is 14.8Mpa, and the bulk density is 2.91g / cm 3 , The porosity is 15.6%.

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Abstract

The invention provides an aluminium titanate material prepared by waste activated alumina and a preparation method thereof. The raw material formula mainly comprises the waste activated alumina and titanium dioxide; and the preparation method comprises the following steps of: taking the waste activated alumina and the titanium dioxide as raw materials, mixing, and pressing the raw materials for molding, leading the raw materials to react at high temperature, cooling the reaction products, thus obtaining the prepared aluminium 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 have values for popularization and application.

Description

technical field [0001] The invention relates to an ecological environment material, that is, the comprehensive utilization of solid waste, and more specifically to a raw material formula and a preparation method for preparing aluminum titanate materials by utilizing waste activated alumina. Background technique [0002] Aluminum titanate material is a new type of ceramic material, which has excellent properties such as close to zero thermal expansion coefficient, low thermal conductivity, high melting point, and thermal shock resistance. It is currently the best high-temperature resistant material among low-expansion materials. , which can be used as the carrier of automobile exhaust purification filter, high-temperature catalyst carrier, engine exhaust pipe, etc. The conventional synthesis method is to use industrial alumina as the main raw material, the content of aluminum titanate in the synthetic material is low, and the production cost is high. Activated alumina is wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/478C04B35/622C04B35/66B09B3/00
Inventor 阮玉忠杨超
Owner FUZHOU UNIV
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