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Method for producing iolite cellular ceramic carrier

A cordierite honeycomb and ceramic carrier technology, applied in ceramic products, chemical instruments and methods, applications, etc., can solve the problems of incomplete removal of impurities and coarse particles, large dust, low efficiency, etc., to achieve directional growth and energy consumption Low, efficient effect

Active Publication Date: 2017-02-08
蚌埠奥美精密制造技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of low efficiency, high energy consumption, large wind and dust, and incomplete removal of impurities and coarse particles in dry sieving, the invention provides a production method of cordierite honeycomb ceramic carrier, which performs a screening process Improvements and adjustments have improved the screening efficiency and extrusion molding rate, which is more conducive to industrial applications

Method used

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  • Method for producing iolite cellular ceramic carrier
  • Method for producing iolite cellular ceramic carrier
  • Method for producing iolite cellular ceramic carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Talc, flaky or / and layered raw kaolin and alumina powder are used as raw materials. The particle size and particle size distribution of each raw material meet the powder requirements, and the amount of each raw material meets the content of silica. The content is 50.7wt%, alumina The content of magnesium oxide is 35.8wt%, and the content of magnesium oxide is 13.5wt%. At the same time, R in the raw kaolin 2 The mass content of O ≤ 0.6%, R in talc 2 O mass content ≤ 0.4%, Na in alumina 2 The mass content of O is ≤0.5%, Fe in raw kaolin and talc 2 o 3 and TiO 2 The mass content of all <1.3%.

[0037] The median particle diameter D50 of raw kaolin is 3.0 μm, the median particle diameter D50 of talc is 2.0 μm, and the median particle diameter D50 of alumina is 2.0 μm.

[0038] Get each powder raw material, produce ceramic carrier according to the following method:

[0039] (1) Add the powder raw materials into the large-scale gravity-free mixing equipment according t...

Embodiment 2

[0044] Talc, flaky or / and layered raw kaolin and alumina powder are used as raw materials. The particle size and particle size distribution of each raw material meet the powder requirements, and the amount of each raw material meets the content of silica. The content is 50.7wt%, alumina The content of magnesium oxide is 35.8wt%, and the content of magnesium oxide is 13.5wt%. At the same time, R in the raw kaolin 2 The mass content of O ≤ 0.6%, R in talc 2 O mass content ≤ 0.4%, Na in alumina 2 The mass content of O is ≤0.5%, Fe in raw kaolin and talc 2 o 3 and TiO 2 The mass content of all <1.3%.

[0045] The median particle diameter D50 of raw kaolin is 3.0 μm, the median particle diameter D50 of talc is 2.0 μm, and the median particle diameter D50 of alumina is 2.0 μm.

[0046] Get each powder raw material, produce ceramic carrier according to the following method:

[0047] (1) Add the powder raw materials into the large-scale gravity-free mixing equipment according t...

Embodiment 3

[0052] Talc, flaky or / and layered raw kaolin and alumina powder are used as raw materials. The particle size and particle size distribution of each raw material meet the powder requirements, and the amount of each raw material meets the content of silica. The content is 50.7wt%, alumina The content of magnesium oxide is 35.8wt%, and the content of magnesium oxide is 13.5wt%. At the same time, R in the raw kaolin 2 The mass content of O ≤ 0.6%, R in talc 2 O mass content ≤ 0.4%, Na in alumina 2 The mass content of O is ≤0.5%, Fe in raw kaolin and talc 2 o 3 and TiO 2 The mass content of all <1.3%.

[0053] The median particle diameter D50 of raw kaolin is 3.0 μm, the median particle diameter D50 of talc is 2.0 μm, and the median particle diameter D50 of alumina is 2.0 μm.

[0054] Get each powder raw material, produce ceramic carrier according to the following method:

[0055] (1) Add the powder raw materials into the large-scale gravity-free mixing equipment according t...

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Abstract

The invention discloses a method for producing an iolite cellular ceramic carrier. The method comprises the steps of burdening, dry blending, kneading and pugging. According to the invention, after pugging, pressurized sieving or / and vacuum sieving is carried out, and then steps of extrusion moulding, drying and sintering are carried out to obtain the iolite cellular ceramic carrier. A waste iolite cellular ceramic carrier forming die is employed during pressurized sieving as a screen mesh. In the invention, after pugging, a process of pressurized sieving or / and vacuum sieving is added, sieving by a dry method is removed, production efficiency is increased, energy consumption is reduced, moulding rate of the extruded finished product is increased, thermal expansion coefficient of the product is reduced, and the method has good application value.

Description

technical field [0001] The invention relates to a method for preparing a cordierite honeycomb ceramic carrier, belonging to the technical field of catalyst carrier preparation. Background technique [0002] The cordierite honeycomb ceramic carrier is a catalyst carrier for gaseous pollution emission post-treatment technology of internal combustion engines, such as: diesel engine selective catalytic reduction SCR carrier, clean fuel internal combustion engine three-way catalytic converter TWC carrier, oxidation catalytic converter DOC carrier and ammonia slip converter ASC carrier, etc. With the lower emission limits of motor vehicle exhaust pollutants and the rapid tightening of motor vehicle economic regulations in the National V and VI emission regulations, it is required that the wall thickness of the honeycomb ceramic carrier must be reduced to less than 5mil in order to obtain greater Catalyst coated surface area and lower flow resistance. However, as the wall thickne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/13C04B33/04B01J21/16B01J35/04
CPCC04B33/04C04B33/1305C04B33/131C04B38/0009B01J21/16C04B2235/349C04B2235/9607C04B2235/3217B01J35/56
Inventor 黄妃慧潘吉庆刘洪月李民
Owner 蚌埠奥美精密制造技术有限公司
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