Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Novel micropore corundum brick and preparation method thereof

A corundum brick and microporous technology, which is applied in the field of new microporous corundum brick and the preparation of the microporous corundum brick, can solve the problems of reduced refractory performance, poor microporation effect, damage to the original structure, etc., and achieves an increase in volume. Density and microporation, uniform temperature distribution in the kiln, and the effect of improving the construction progress

Inactive Publication Date: 2014-07-23
巩义市第五耐火材料总厂
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most ceramic cup bricks are not microporous or ultra-microporous bricks. Iron slag and alkali substances penetrate into the brick body through the pores, which reduces the refractory performance of the brick (lower melting point), and is subject to chemical erosion. The original structure of the brick is damaged. Destruction, the strength is greatly reduced, and the erosion resistance is also reduced
Practice has proved that it is difficult to determine the exact service life of existing ceramic cups
In the early stage of application, it protects the hearth and bottom carbon bricks of the blast furnace. However, in the middle and later stages of the blast furnace, it is still maintained by carbon bricks, so it is difficult to achieve longevity.
[0005] The existing microporous corundum bricks have poor alkali resistance and slag resistance, and the microporous effect is not good. Many companies do not tend to use domestic microporous corundum bricks, and the existing products are originally made of double discs. Friction press plane press molding, the product size is not accurate enough, the product was originally fired in a guided flame kiln, because the temperature distribution in the kiln is not uniform, which is not conducive to the formation of microporous product structure

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel micropore corundum brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A new type of microporous corundum brick, characterized in that: the novel microporous corundum brick is prepared from the following raw materials in weight ratio, wherein, metal silicon 7%, silicon carbide 8%, aluminum oxide 7% , dense corundum 44%, mullite 8%, brown corundum 32%, resin 4%.

[0023] The present embodiment realizes by following proportioning and processing step:

[0024] a. Raw material crushing: crush dense corundum into 32% of the total weight ratio of particle size 0.1~3.2mm, and 12% of particle size smaller than 320 mesh; crush brown corundum into small particles with particle size of 1~3.2mm, and crush mullite into small particles with particle size smaller than 320 mesh fine powder, metal silicon is crushed into a fine powder with a particle size of less than 320 mesh, silicon carbide is crushed into a fine powder with a particle size of less than 200 mesh, and aluminum oxide is crushed into a fine powder with a particle size of less than 600 ...

Embodiment 2

[0031] A new microporous corundum brick, characterized in that: the novel microporous corundum brick is prepared from the following raw materials in weight ratio, wherein, metal silicon 8%, silicon carbide 5%, aluminum oxide 4% , dense corundum 40%, mullite 9%, brown corundum 30%, resin 3%.

[0032] The present embodiment realizes by following proportioning and processing step:

[0033]a. Raw material crushing: crush dense corundum into 27% of the total weight ratio of particle size 0.1~3.2mm, and 13% of particle size smaller than 320 mesh; crush brown corundum into small particles with particle size of 1~3.2mm, and crush mullite into particles smaller than 320 mesh fine powder, metal silicon is crushed into a fine powder with a particle size of less than 320 mesh, silicon carbide is crushed into a fine powder with a particle size of less than 200 mesh, and aluminum oxide is crushed into a fine powder with a particle size of less than 600 mesh;

[0034] b. Aggregate mixin...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a novel micropore corundum brick which is not only good in alkali resistance, scrap resistance and iron corrosion resistance, but also has a good micropore structure, and a preparation method of the corundum brick. The novel micropore corundum brick is characterized by being prepared from the following raw materials in percentage by weight: 6-11% of metal silicon, 4-16% of silicon carbide, 3-7% of aluminum trioxide, 28-52% of dense corundum, 6-11% of mullite, 18-38% of brown fused alumina and 2-7% of resin. In the preparation steps, a full-automatic 2500T hydraulic machine is adopted for side surface pressing and forming, and a novel energy-saving environment-friendly shuttle type kiln is adopted for sintering. The novel micropore corundum brick disclosed by the invention can not only meet the requirement on the service life of a blast furnace, but also can completely take the place of imported products to be used as a ceramic cup, including combined bricks at a tuyere, an iron buckle and a scrap hole in a furnace cylinder area of the blast furnace, and the brick can be used in match with mold pressed small carbon bricks for building a brick lining of the furnace cylinder, and can be also used in match with large-block carbon bricks for building the brick lining of the furnace cylinder.

Description

technical field [0001] The invention relates to a refractory material for a blast furnace hearth, in particular to a novel microporous corundum brick used for a blast furnace hearth and a preparation method for the microporous corundum brick. Background technique [0002] Corundum bricks are mainly used in ironmaking blast furnaces and blast furnace hot blast stoves, refining furnaces outside steelmaking furnaces, sliding water vessels, glass melting furnaces, and petrochemical industrial furnaces. In addition, they are widely used in cracking and reforming furnaces in petrochemical and chemical fertilizer industries. , metallurgical industry and other high-temperature kiln linings, and kiln furniture. Microporous corundum bricks are widely used in blast furnace hearths as ceramic cup bricks because of their good alkali resistance, slag resistance, and iron corrosion resistance. The slag properties are relatively poor, and the microporous effect is not good, and there are m...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B38/06
Inventor 张建武赵永安校松波刘志鹏丁权波
Owner 巩义市第五耐火材料总厂
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com