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Zirconia honeycomb ceramic body

A honeycomb ceramic body, zirconium technology, applied in the field of ceramic materials, can solve the problem of reducing the thermal stability, corrosion resistance and thermal conductivity of the ceramic body, the temperature resistance of the honeycomb ceramic regenerator is not high enough, the surface layer of the ceramic body is easy to fall off, etc. problems, to achieve broad market prospects and use value, improve economic and social benefits, and achieve good chemical and thermal stability.

Inactive Publication Date: 2008-12-17
朱根源
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a major problem in the use of the above-mentioned honeycomb ceramic regenerator: the temperature resistance of the honeycomb ceramic regenerator is not high enough. Generally, the maximum service temperature of the cordierite honeycomb ceramic body is 1250 ° C, and the highest temperature of the mullite honeycomb ceramic body The operating temperature is 1350°C, while the maximum operating temperature of the corundum-mullite honeycomb ceramic body is 1450°C, which cannot meet the requirements of engineering applications that often require ceramic regenerators to work in environments above 1500°C
Due to the low maximum service temperature of the above three types of ceramic bodies, when used in an environment above 1500 ° C, it is easy to make cordierite, mullite and corundum mullite ceramic bodies, especially cordierite and mullite ceramic bodies The service life is reduced, and the surface layer of the ceramic body is easy to fall off and crack, thereby reducing the thermal stability, corrosion resistance and thermal conductivity of the ceramic body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1, the corundum-mullite type zirconium honeycomb ceramic body consists of 20% corundum-mullite powder, 45% α-Al 2 o 3 powder, 15% kaolin, 5% MgO, 4% organic cellulose, 5% tung oil and 6% ZrO 2 powder; its chemical composition: Al 2 o 3 60.78%, SiO 2 21.25%, ZrO 2 5.61%, MgO 5.17%, CaO 5.36%, impurity Fe 2 o 3 0.68%, Na 2 O+K 2 O is 0.75%, and it is prepared according to the steps of the following preparation method.

[0018] 1. Combine corundum mullite powder, α-Al 2 o 3 powder, kaolin, organic cellulose, MgO and ZrO 2 After the powder is evenly mixed according to the weight percentage, then add tung oil in proportion, then add an appropriate amount of water (the amount of water when the mixed material has toughness), mix and grind in the ball mill for 2-3 hours, and then put it into the rough mixer After 2-3 times of medium roughing, it is aged for 24 hours to obtain mud;

[0019] 2. Put the mud material into the vacuum mud mixer for mud refining, ...

Embodiment 2

[0026] Example 2, the cordierite-type zirconium honeycomb ceramic body consists of 40% cordierite powder, 20% α-Al 2 o 3 powder, 20% kaolin, 6% MgO, 5% organic cellulose, 4% tung oil and 5% ZrO 2 powder; its chemical composition: Al 2 o 3 40.98%, SiO 2 40.44%, ZrO 2 4.56%, MgO 6.67%, CaO 5.46%, impurity Fe 2 o 3 0.57%, Na 2 O+K 2 O is 0.81%, and it is prepared according to the steps of the preparation method described in the present invention.

[0027] Present embodiment 2 detects each technical index is:

[0028] Compressive strength: 15.3MPa, heat capacity (20-1000°C) / J / KgK: 1420,

[0029] Temperature resistance: 1590°C, shock resistance thermal stability (850°C water cooling): 13 times.

Embodiment 3

[0030] Example 3, the mullite type zirconium honeycomb ceramic body consists of 30% mullite powder, 30% α-Al 2 o 3 powder, 20% kaolin, 6% MgO, 5% organic cellulose, 4% tung oil and 5% ZrO 2 powder; its chemical composition: Al 2 o 3 57.78%, SiO 2 24.25%, ZrO 2 4.61%, MgO 6.17%, CaO 5.36%, impurity Fe 2 o 3 0.59%, Na 2 O+K 2 O is 0.75%, and it is prepared according to the steps of the preparation method described in the present invention.

[0031] Present embodiment 3 is through detecting each technical index is:

[0032]Compressive strength: 16.2MPa, heat capacity (20-1000°C) / J / KgK: 1450,

[0033] Temperature resistance: 1650°C, shock resistance thermal stability (850°C water cooling): 14 times.

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Abstract

The invention discloses a zirconia honeycomb ceramic body which comprises the raw materials as follows: ceramic raw material, alpha-Al2O3 powder, clay, Mgo, organic cellulose, a binder and ZrO2 powder. The raw materials are mixed evenly by weight percentage and then the binder and moderate amount of water are added, and ball milling, mixed milling and staleness are carried out to prepare pug; the pug is put into a vacuum pugmill for pug milling, and then extrusion molding wet honeycomb ceramic body is put into a far-infrared kiln for drying and shaping into a dry blank; the honeycomb ceramic body is calcined at 1500 DEG C to 1700 DEG C and then cooled and taken out from the kiln. The zirconia honeycomb ceramic body is not only applicable to be used under high temperature environment being over 1500 DEG C in a heating kiln; besides, the heat exchange of the heating kiln is fast and even, thus saving the fuel of the regenerative heating kiln by about 40 percent to 70 percent, promoting yield by more than 15 percent, reducing the emission of NOX gas to be lower than 100ppm and resulting in lower than 150 DEG C gas emission temperature; therefore, the zirconia honeycomb ceramic body greatly improves the burning effect of the regenerative heating kiln, saves fuel and energy, reduces the emission of harmful gases, prolongs the service life of the regenerative heating kiln, improves environment and promotes both economic and social benefits.

Description

technical field [0001] The invention relates to ceramic materials, in particular to a zirconium honeycomb ceramic body. Background technique [0002] In various industrial kiln regenerative heating furnaces such as iron and steel, petrochemical, etc., the honeycomb ceramic body is an ideal ceramic regenerative material for regenerative industrial heating furnaces. It can not only improve the combustion effect, save energy, but also reduce harmful gases. emission and reduce environmental pollution. As the key component in the regenerative industrial heating furnace - the ceramic regenerator, the performance index and thermal efficiency of the regenerative heating furnace directly depend on the performance of the ceramic regenerator. With the development of ceramic preparation technology, honeycomb ceramics have been developed in recent years. According to the matrix structure of honeycomb ceramics, the currently used honeycomb ceramic regenerators mainly include cordierite t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/00C04B35/10C04B35/622
Inventor 朱根源
Owner 朱根源
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