Thermal storage ceramic material and preparation method thereof

A technology of ceramic materials and ceramic fillers, applied in the field of ceramic materials, can solve problems such as equipment failure, reduced residence time, and increased bed resistance drop, and achieve the effect of prolonging the service life

Active Publication Date: 2015-07-08
JIANGSU CEC RICM ENERGY CONSERVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silica deposition will cause the effective path diameter of the packed bed to decrease, the bed resistance drop to increase, and the residence time of the gas to be treated to decrease. When it develops to a serious degree, it will lead to complete failure of the equipment treatment. At this time, the packing must be replaced.

Method used

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  • Thermal storage ceramic material and preparation method thereof
  • Thermal storage ceramic material and preparation method thereof
  • Thermal storage ceramic material and preparation method thereof

Examples

Experimental program
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Effect test

preparation Embodiment 1

[0039] Preparation Example 1 Preparation of thermal storage ceramic materials

[0040] Step a: 6700g cordierite, 2190g Al 2 o 3 And 1010g talcum mixes, pulverizes, crosses 300 mesh sieves, obtains compound;

[0041] Step b: using a wet slurry iron removal process to remove iron in the mixture;

[0042] Step c: add 78g rare earth oxides (including La 2 o 3 、Eu 2 o 3 and Tb 2 o 3 ), the mixture is subjected to vacuum mud refining at a vacuum degree greater than 720mmHg, stale, and the stale time is less than or equal to 72 hours, and then extruded by plastic extrusion molding;

[0043] Step d: drying the mixture obtained in step c at less than 45°C for 20-60 minutes, and then sintering at 950-1000°C for 32-35 hours to obtain a heat storage ceramic material.

[0044] The component content of the thermal storage ceramic material obtained by the above method is as follows:

[0045] al 2 o 3 42.0%, SiO 2 46.7%, MgO 5.2%, rare earth oxide (La 2 o 3 +Eu 2 o 3 +Tb...

preparation Embodiment 2

[0046] Preparation Example 2 Preparation of thermal storage ceramic materials

[0047] Step a: 6810g cordierite, 2380g Al 2 o 3 And 810g talcum mixes, pulverizes, crosses 300 mesh sieves, obtains compound;

[0048] Step b: using a wet slurry iron removal process to remove iron in the mixture;

[0049] Step c: add 145g rare earth oxides (comprising La 2 o 3 、Eu 2 o 3 and Tb 2 o 3 ), the mixture is subjected to vacuum mud refining at a vacuum degree greater than 720mmHg, stale, and the stale time is less than or equal to 72 hours, and then extruded by plastic extrusion molding;

[0050] Step d: drying the mixture obtained in step c at less than 45°C for 60-100 minutes, and then sintering at 1000-1100°C for 30-33 hours to obtain a heat storage ceramic material.

[0051] The component content of the thermal storage ceramic material obtained by the above method is as follows:

[0052] al 2 o 3 47.0%, SiO 2 43.5%, MgO 3.8%, rare earth oxide (La 2 o 3 +Eu 2 o 3 ...

preparation Embodiment 3

[0053] Preparation Example 3 Preparation of thermal storage ceramic materials

[0054] Step a: 7210g cordierite, 2210g Al 2 o 3 And 970g talcum mixes, pulverizes, crosses 300 mesh sieves, obtains compound;

[0055] Step b: using a wet slurry iron removal process to remove iron in the mixture;

[0056] Step c: add 214g rare earth oxides (comprising La 2 o 3 、Eu 2 o 3 and Tb 2 o 3 ), the mixture is subjected to vacuum mud refining at a vacuum degree greater than 720mmHg, stale, and the stale time is less than or equal to 72 hours, and then extruded by plastic extrusion molding;

[0057] Step d: drying the mixture obtained in step c at less than 45°C for 80-120 minutes, and then sintering at 1100-1200°C for 30-35 hours to obtain a heat storage ceramic material.

[0058] The component content of the thermal storage ceramic material obtained by the above method is as follows:

[0059] al 2 o 3 47.3%, SiO 2 40.8%, MgO 5.2%, rare earth oxide (La 2 o 3 +Eu 2 o 3 ...

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Abstract

The invention provides a thermal storage ceramic material and a preparation method thereof. The thermal storage ceramic material comprises the following ingredients by weight percent: 42.0-55.0% of Al2O3, 32.5-46.7% of SiO2, 3.8 -8.0% of MgO and 0.8-4% of rare earth oxide, wherein the rare earth oxide comprises La2O3, Eu2O3 and Tb2O3. When being used as a thermal storage medium to perform thermal oxidation on a silicon-containing organic waste gas, the thermal storage ceramic material provided by the invention can effectively prevent silicon dioxide generated by organic silicon in the waste gas from crystallizing on the ceramic surface so as to prolong the service lives of ceramic fillers and ceramic bed equipment and solve the problem that organic silicon gases cannot be treated by a thermal storage type thermal oxidation method.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a heat storage ceramic material used as a heat storage and heat transfer medium. Background technique [0002] As the heat storage and heat transfer medium of environmental protection equipment, ceramic materials are widely used along with the development of environmental protection equipment. The ceramic materials used for heat storage and heat transfer medium mainly include mullite (3Al 2 o 3 2SiO2 2 ) material, cordierite + mullite material, cordierite + alumina material, mullite + alumina material, etc. These materials can not only meet the requirements of heat storage and heat transfer, but also have a relatively low cost. [0003] If the organic waste gas contains organosilicon compounds, when the waste gas is oxidized, the organosilicon will be oxidized to inorganic silicon dioxide and form crystals on the surface of the regenerative ceramic filler. Due to the similarity between a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/14C04B35/185C04B35/622
Inventor 谢永恒李洪发吴文忠姜海
Owner JIANGSU CEC RICM ENERGY CONSERVATION TECH
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