Antioxidant coating for surface of aluminum oxide-silicon carbidee-carbon brick

An anti-oxidation coating and silicon carbide technology, which is applied in the field of anti-oxidation coatings on the surface of alumina-silicon carbide-carbon bricks, can solve problems such as low strength, penetration and erosion of molten iron, and damage to lining ASC bricks, and achieve a reasonable combination Effect

Inactive Publication Date: 2010-09-15
常州市武进第一耐火材料有限公司
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of using coal gas or natural gas as fuel and using oxygen in the air to support combustion, the surface of ASC bricks (because ASC bricks contain carbon) will inevitably be oxidized and corroded.
Usually, after about 100 hours of open flame baking, the ASC brick working surface is oxidized to a depth of 25-30mm. This layer of oxide layer has a loose structure and low strength, and is easily penetrated and eroded by molten iron, and it cannot withstand high-temperature molten iron. scour
It can be seen that the ASC bricks lining the torpedo type mixed iron car are damaged during the oven process, which will inevitably lead to a shortened service life of the torpedo type mixed iron car

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 1～3

[0019] Embodiment 1~3 prepares glaze powder

[0020] Concrete preparation steps are as follows:

[0021] ① Prepare glaze powder raw materials according to the formula in Table 1

[0022] Table 1

[0023] components

granularity

Dosage, parts by weight

Example 1

Dosage, parts by weight

Example 2

Dosage, parts by weight

Example 3

Borax

175μm sieve ≤ 10%

40

60

50

quartz

88μm sieve ≤ 10%

18

12

16

Sodium carbonate

175μm sieve ≤ 10%

15

8

12

Calcite

88μm sieve ≤ 10%

15

12

13

Albite

88μm sieve ≤ 10%

12

8

9

[0024] ② Preparation of glaze powder

[0025] Mix the raw materials prepared in step ① evenly, heat them in a kiln to make them into a molten glass body, then pour them into cold water for quenching, take out the quenched materials, dry them and grind them to fine Glaze powders A, B and C were prepa...

Embodiment 4～6

[0026] Embodiment 4~6 prepares oxidation-resistant coating

[0027] Concrete preparation steps are as follows:

[0028] ① Prepare the raw materials of coating component A according to the formula in Table 2

[0029] Table 2

[0030] components

granularity,

μm

dosage,

parts by weight

Example 4

dosage,

parts by weight

Example 5

dosage,

parts by weight

Example 6

glaze powder

10～88

50 (embodiment 1

Glaze powder A)

70 (embodiment 2

Glaze powder B)

60 (embodiment 3

Glaze powder C)

α-Al 2 o 3 Micropowder

0.5～8

5

2

2.5

Bentonite powder

10～74

7

1

2.0

SiO 2 Micropowder

0.1～0.5

3

1

1.5

Silicon carbide powder

88～175

35

26

34

[0031] 2. prepare carboxymethyl cellulose (preferably sodium carboxymethyl cellulose) and water by the weight ratio of carboxymethy...

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
melting pointaaaaaaaaaa
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to an antioxidant coating for the surface of an aluminum oxide-silicon carbidee-carbon (ASC) brick. The antioxidant coating is aqueous paste substance formed by mixing a component A and a component B by a weight part proportion of 100:101.5-102.5, wherein the component A is powder formed by mixing 50-70 parts by weight of glaze powder, 2-5 parts by weight of alpha-AL2O3 micro-powder, 1-7 parts by weight of bentonite powder, 1-3 parts by weight of SiO2 micro-powder and 26-35 parts by weight of silicon carbide powder; the component B viscous fluid formed by dissolving 1.5-2.5 parts by weight of carboxymethyl cellulose into 100 parts by weight of water, and the glaze powder in the component A is fine powder prepared by drying and grinding an material formed by mixing, melting and quenching 40-60 parts by weight of borax, 12-18 parts by weight of quartz, 8-15 parts by weight of sodium carbonate, 12-15 parts by weight of calcite and 8-12 parts by weight of albite. After coated with the antioxidant coating, ASC bricks of the lining of a torpedo type mixed iron car has the service life prolonged at least for 50 heating numbers, which saves the refractory material.

Description

technical field [0001] The invention relates to an anti-oxidation paint used on the surface of alumina-silicon carbide-carbon bricks, in particular to an anti-oxidation paint used on the surface of alumina-silicon carbide-carbon bricks used for inner lining of torpedo type mixed iron vehicles. Background technique [0002] The torpedo-type mixed iron car is a device for transporting molten iron or desulphurizing, desiliconizing and dephosphorizing the molten iron. Its lining alumina-silicon carbide-carbon bricks (hereinafter referred to as ASC bricks) are carbon-containing unburned bricks. When the interior of the torpedo type mixed iron car is built with ASC bricks and the furnace mouth is poured with the furnace mouth material, it must be baked for about 100 hours according to the oven curve from room temperature to about 900 ℃, and then the molten iron can be filled while it is hot . However, in the process of using coal gas or natural gas as fuel and using oxygen in the...

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): C04B41/68
Inventor 华珊兴张仁潘承恺
Owner 常州市武进第一耐火材料有限公司
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