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Zircon 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, good chemical thermal stability, rapid and uniform heat exchange

Inactive Publication Date: 2013-07-17
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 service temperature is 1350°C, while the maximum service temperature of the corundum mullite honeycomb ceramic body is 1450°C.
[0003] It cannot meet the requirements of engineering applications that often require ceramic regenerators to work in an environment 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

[0021] 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 is prepared according to the following preparation method steps.

[0022] 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;

[0023] 2. Put the mud material into the vacuum mud mixer for mud refining, and then p...

Embodiment 2

[0030] 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

[0031] 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 is prepared according to the steps of the preparation method described in the present invention.

[0032] Present embodiment 2 detects each technical index is:

[0033] Compressive strength: 15.3MPa, heat capacity (20-1000°C) / J / KgK: 1420,

[0034] Temperature resistance: 1590°C, shock resistance thermal stability (water cooling at 850°C): 13 times.

Embodiment 3

[0035] Embodiment 3, described mullite type zirconium honeycomb ceramic body is made 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 o3 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.

[0036] Present embodiment 3 is through detecting each technical index is:

[0037] Compressive strength: 16.2MPa, heat capacity (20-1000°C) / J / KgK: 1450,

[0038] Temperature resistance: 1650°C, shock resistance thermal stability (850°C water cooling): 14 times.

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Abstract

The invention discloses a zircon honeycomb ceramic body comprising the following raw material ingredients: a ceramic raw material, alpha-Al2O3 powder, clay, MgO, organic cellulose, an adhesive and ZrO2 powder. The zircon honeycomb ceramic body is prepared by uniformly mixing the raw materials at a weight ratio, adding the adhesive and a proper dosage of water, and performing ball grinding, mixed milling and staling on the mixture to obtain pug; smelting the pug in a vacuum pugmill, and putting, drying and sizing an extrusion formed wet honeycomb ceramic body in an infrared furnace to obtain a dry blank; and roasting the honeycomb ceramic body at a temperature of 1500-1700 DEG C, cooling and discharging the honeycomb ceramic body from the furnace. The zircon honeycomb ceramic body can be used in a heating furnace with temperature higher than 1500 DEG C, and furthermore, the heat exchange of the heating furnace is quick and uniform, so that 40-70% of fuel of the heat accumulation type heating furnace is saved, the yield is improved by more than 15%, the emission of NOX gases is reduced to be lower than 100 ppm, the flue gas exhaust temperature is lower than 150 DEG C, the combustion effect of the heat accumulation type heating furnace is improved, the fuel energy source is saved, the emission of harmful gases is reduced, and the service life of the heat accumulation type heating furnace is prolonged.

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 typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B38/00C04B35/106C04B35/622
Inventor 朱根源
Owner 朱根源
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