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A kind of microporous calcium aluminum titanate raw material and preparation method thereof

A technology of microporous calcium aluminate titanate and raw materials, which is applied in the field of calcium titanoaluminate, can solve the problems of slow diffusion, incomplete grain growth and development, and reduce the purity and grain size of microporous raw materials, so as to achieve low production cost, The effect of abundant mineral deposits and increasing grain size and content

Active Publication Date: 2020-04-10
锦州国泰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the additive burn-off method has its advantages, in the high-temperature sintering process, the diffusion between solid phases is slow, resulting in incomplete grain growth and development, thereby reducing the purity and grain size of microporous raw materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A raw material of microporous calcium aluminate titanate and a preparation method thereof. According to the mass ratio of bauxite: rutile (1 ~ 1.02): 1, add bauxite and rutile into the mixer, stir for 0.3 ~ 0.5 hours to obtain the mixture; then add the mixture into the electric arc furnace and heat up To 1500~1560°C, keep warm for 20~30 minutes; then add limestone to the electric arc furnace, raise the temperature to 1630~1645°C, keep warm for 20~30 minutes; remove the upper layer of scum, cool to room temperature with the furnace, and crush to obtain microporous titanium Calcium aluminate raw material.

[0022] The added amount of the limestone is 20-22wt% of the mixture.

[0023] The microporous calcium aluminate titanate raw material prepared in this example is tested: the calcium aluminate titanate content is 85-87wt%; the grain size is 6-8 μm.

Embodiment 2

[0025] A raw material of microporous calcium aluminate titanate and a preparation method thereof. According to the mass ratio of bauxite: rutile (1.01 ~ 1.03): 1, add bauxite and rutile into the mixer, stir for 0.3 ~ 0.5 hours to obtain the mixture; then add the mixture into the electric arc furnace and heat up To 1500~1560°C, keep warm for 20~30 minutes; then add limestone to the electric arc furnace, raise the temperature to 1630~1645°C, keep warm for 20~30 minutes; remove the upper layer of scum, cool to room temperature with the furnace, and crush to obtain microporous titanium Calcium aluminate raw material.

[0026] The added amount of the limestone is 21-23wt% of the mixture.

[0027] The microporous calcium aluminate titanate raw material prepared in this example is tested: the calcium aluminate titanate content is 86-88wt%; the grain size is 7-9 μm.

Embodiment 3

[0029] A raw material of microporous calcium aluminate titanate and a preparation method thereof. According to the mass ratio of bauxite: rutile (1.02 ~ 1.04): 1, add bauxite and rutile into the mixer, stir for 0.3 ~ 0.5 hours to obtain the mixture; then add the mixture into the electric arc furnace and heat up To 1540~1600°C, keep warm for 20~30 minutes; then add limestone to the electric arc furnace, raise the temperature to 1635~1650°C, keep warm for 20~30 minutes; remove the upper layer of scum, cool to room temperature with the furnace, and crush to obtain microporous titanium Calcium aluminate raw material.

[0030] The added amount of the limestone is 22-24wt% of the mixture.

[0031] The microporous calcium aluminate titanate raw material prepared in this example is tested: the calcium aluminate titanate content is 87-89wt%; the grain size is 8-10 μm.

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Abstract

The invention relates to a microporous titanium calcium aluminate raw material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: adding bauxite and rutile into a stirring machine in a mass ratio of (1-1.05) to 1, and stirring for 0.3-0.5 hour, so as to obtain a mixture; adding the mixture into an electric arc furnace, heating to 1500-1600 DEG C, and maintaining the temperature for 20-30 minutes; adding limestone into the electric arc furnace, heating to 1630-1650 DEG C, and maintaining the temperature for 20-30 minutes; removing upper-layer scum, cooling together with the furnace to the room temperature, and grinding, so as to obtain the microporous titanium calcium aluminate raw material, wherein the adding amount of the limestone is 20wt%-25wt% of weight of the mixture. The preparation method has the beneficial effects that a preparation process is simple, and the production cost is low; and the prepared microporous titanium calcium aluminate raw material has the characteristics of high purity and good crystallinity.

Description

technical field [0001] The invention belongs to the technical field of calcium aluminate titanate. Specifically relates to a microporous calcium aluminate titanate raw material and a preparation method thereof. Background technique [0002] Calcium aluminum titanate is Al 2 o 3 、TiO 2 A type of solid solution formed with CaO under high temperature conditions, has the characteristics of high temperature resistance, corrosion resistance and low thermal conductivity, and is widely used in the field of refractory materials. Such as "a ladle bottom castable and its preparation method" (201510311418.9), "a calcium titanate-alumina modified refractory material and its preparation method and application" (201510013589.3) and "a reverberatory furnace for vanadium smelting Calcium aluminate titanate prefabricated parts for inner lining and its preparation method” (201510469732.X) and other technologies, mainly mixing calcium aluminate titanate and binder, molding and firing to obt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/465C04B35/478C04B35/626C04B35/66C04B38/00
CPCC04B35/465C04B35/478C04B35/626C04B35/66C04B38/00C04B2235/442C04B2235/786
Inventor 张寒陈建威赵惠忠李静捷赵鹏达易萍
Owner 锦州国泰实业有限公司