High-aluminum bearing ceramic bar beam and preparation method thereof

A technology of ceramic beams and high aluminum, applied in the field of beams, can solve the problems of low compressive and flexural strength, small porosity of ceramic beams, and low thermal stability of work, and achieve high porosity and airflow Efficient distribution, high acid and alkali resistance

Active Publication Date: 2014-02-26
JIANGXI PINGXIANG LONGFA ENTERPRISE
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the beams are slender strips of more than 1 meter and made of ordinary ceramic materials. The ceramic beams have a small opening rate, low compressive and flexural strength, and the flexural strength is generally around 150MPa, which is not up to the actual

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, the high-alumina ceramic beam is composed of 70wt% alumina, 13%wt% semi-stable zirconia, 11wt% china clay and 6wt% wollastonite raw materials, and is prepared according to the following process ;

[0023] 1. After ball milling and mixing the above raw materials in proportion, add 4 wt% Guangdong black mud and 3 wt% carboxymethyl cellulose, and add an appropriate amount of water (the mud material has good toughness, and it will form when kneading by hand. amount of water when in agglomerate) mixed with ball mill to make lumpy mud,

[0024] 2. The lumpy mud material is stale for 13 days, and then extruded in a vacuum mud mill to form a green body. The working temperature should be controlled below 38°C during extrusion.

[0025] 3. Wrap the green body with a film and dry it naturally for 47 days to reduce the water content of the green body to 4.5%.

[0026] 4. Put the dried green body into a hot air furnace to dry for 17 days, and dry the green body until th...

Embodiment 2

[0035] Embodiment 2, the high-alumina ceramic beam is composed of 72wt% alumina, 10%wt% semi-stable zirconia, 13wt% china clay and 5wt% wollastonite raw materials, and is prepared according to the following process;

[0036] 1. After ball milling and mixing the above raw materials in proportion, add Guangdong black mud of 3 wt% and carboxymethyl cellulose of 5 wt% in the weight of the above mixture, and add an appropriate amount of water to mix and ball mill to make block mud.

[0037] 2. The lumpy mud material is stale for 12 days, and then extruded in a vacuum mud mill to form a green body. The working temperature should be controlled below 38°C during extrusion.

[0038] 3. Wrap the green body with a film and dry it naturally for 48 days to reduce the water content of the green body to 4.1%.

[0039] 4. Put the dried green body into a hot air furnace to dry for 16 days, and dry the green body until the water content is below 0.2% to make a semi-finished product.

[0040] 5...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Bulk densityaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Flexural strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-aluminum bearing ceramic bar beam and a preparation method thereof. The preparation method is as follows: 64-72wt% of aluminum trioxide, 10-15%wt% of zirconia, 10-15wt% of china clay and 4-6wt% of wollastonite raw material are mixed by ball milling, then Guangdong black mud, carboxymethyl cellulose and water are added for ball milling mixing to prepare a block-shaped mud material, the block-shaped mud material is made into a blank in a stale vacuum mud refining machine, and the blank is coated with a film for nature drying, then is put in a hot air stove for not less than 15 days for drying to have a water content below 0.2%, further is put into a high-temperature shuttle kiln for heating to 600-700 DEG C, is kept warm for 8 to 10 hours, then is heated to 1400 - 1500 DEG C, and is kept warm for 4 to 5 hours for cooling to discharge. The high-aluminum bearing ceramic bar beam has high acid and alkali resistance and corrosion resistance, also has high compressive strength and flexural strength and high opening rate, is suitable for requirements of high gas velocity, reduces the use number of the bar beam, has the characteristics of stability, safety, low resistance, low consumption and uniform distribution in a strong acid medium, and can improve the acid yield by more than 12%, increase the service life by more than 3 years, and reduce the production cost by more than 30%.

Description

technical field [0001] The invention relates to a bar beam used in an acid industrial drying absorption tower, in particular to a high-alumina load-bearing ceramic bar beam and a preparation method thereof. Background technique [0002] In the dry absorption tower of the acid industry, it is necessary to use beams to support fillers and catalysts. Due to the very harsh working conditions of the dry absorption tower, the beams not only need to have good acid and alkali resistance, corrosion and high temperature resistance, but also under the above conditions To have high compressive and flexural strength. At present, most of the beams are slender strips of more than 1 meter and made of ordinary ceramic materials. The ceramic beams have a small opening rate, low compressive and flexural strength, and the flexural strength is generally around 150MPa, which is not up to the actual The requirement of 180 MPa is required, so in actual production, it is easy to cause local damage ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B35/10C04B35/622
Inventor 罗接发
Owner JIANGXI PINGXIANG LONGFA ENTERPRISE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap