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A kind of production method of cordierite honeycomb ceramic carrier

A technology of cordierite honeycomb and ceramic carrier, which is applied in the direction of ceramic products, chemical instruments and methods, physical/chemical process catalysts, etc., which can solve the problems of incomplete removal of impurities and coarse particles, large wind and dust, and high energy consumption, so as to facilitate orientation The effect of growth, low energy consumption and high hardness

Active Publication Date: 2019-04-16
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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  • A kind of production method of cordierite honeycomb ceramic carrier
  • A kind of production method of cordierite honeycomb ceramic carrier
  • A kind of production method of cordierite honeycomb ceramic carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

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

[0039] (1) Add the powder raw materials into the large-scale non-gravity mixing equipment according to the proportion, mix ...

Embodiment 2

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

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

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

[0047] (1) Add the powder raw materials into the large-scale non-gravity mixing equipment according to the proportion, mix ...

Embodiment 3

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

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

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

[0055] (1) Add the powder raw materials into the large-scale non-gravity mixing equipment according to the proportion, mix ...

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Abstract

The invention discloses a method for producing a cordierite honeycomb ceramic carrier, which includes the steps of batching, dry mixing, kneading, and mud scouring. After the mud simmering, it is first subjected to pressure sieving or / and vacuum sieving, and then extrusion is performed. Molding, drying, and firing are performed to obtain a cordierite honeycomb ceramic carrier, in which a waste cordierite honeycomb ceramic carrier forming mold is used as a screen mesh for pressure sieving. The present invention adds pressure sieving or / and vacuum sieving steps after mud scouring, and removes dry sieving, thereby improving production efficiency, reducing energy consumption, increasing the molding rate of extruded finished products, reducing the thermal expansion coefficient of the product, and has the advantages Very good application value.

Description

Technical field [0001] The invention relates to a preparation method of a cordierite honeycomb ceramic carrier, which belongs to the technical field of catalyst carrier preparation. Background technique [0002] The cordierite honeycomb ceramic carrier is a catalyst carrier for the post-treatment technology of gaseous pollutant emissions from 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 escape converter ASC carrier and so on. With the national V and VI emission regulations on lower emission limits for motor vehicle exhaust pollutants and the rapid tightening of motor vehicle economic regulations, it is required that the wall thickness of the honeycomb ceramic carrier must be reduced to less than 5 mils to obtain greater The catalyst coats the surface area and lower flow resistance. However, as th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/16C04B38/00C04B33/13C04B33/04B01J35/04
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