Corundum-spinel casting material for dip pipe of RH refining furnace

A corundum spinel and refining furnace technology is applied in the field of refractory materials, which can solve the problems of poor corrosion resistance, slag penetration resistance and thermal shock resistance, poor thermal shock resistance of castables, and prone to crack structures. Effects of reduced porosity, increased density, improved thermal shock resistance and strength

Inactive Publication Date: 2013-07-31
武汉钢铁有限公司
View PDF3 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, because the castable is easy to stick to slag, the thick slag attached to the outer surface of the dipping tube will seriously affect the normal production. Poor seismic performance, prone to cracks and structural spalling
At present, there are two kinds of castabl...

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
  • Corundum-spinel casting material for dip pipe of RH refining furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A corundum-spinel castable for dipping pipes of a RH refining furnace is composed of a main material and an admixture, and the components of the main material by weight percentage are:

[0026] Fused white corundum accounts for 60%,

[0027] Fused dense corundum accounts for 10%,

[0028] Fused magnesia powder accounts for 6%,

[0029] Ultrafine spinel powder accounts for 8%,

[0030] Activated alumina powder accounts for 5%,

[0031] Calcium aluminate cement group accounted for 6%,

[0032] Zirconia sol accounts for 5%;

[0033] The admixtures are FDN water reducing agent equal to 1% of the weight of the main material and explosion-proof organic fiber equal to 0.15% of the weight of the main material, wherein: the particle size of fused magnesia is ≤ 0.1mm, the particle size of spinel micropowder is ≤ 25μm, and the active The particle size of alumina powder is ≤0.1mm, and the explosion-proof organic fiber is polypropylene fiber; the size of various particles in fu...

Embodiment 2

[0035] A corundum-spinel castable for dipping pipes of a RH refining furnace is composed of a main material and an admixture, and the components of the main material by weight percentage are:

[0036] Fused white corundum accounts for 45%,

[0037] Fused dense corundum accounts for 25%,

[0038] Fused magnesia powder accounts for 6%,

[0039] Ultrafine spinel powder accounts for 10%,

[0040] Activated alumina powder accounts for 5%,

[0041] Calcium aluminate cement group accounted for 5%,

[0042] Zirconia sol accounts for 4%;

[0043] The admixtures are FDN water reducing agent equal to 1% of the weight of the main material and explosion-proof organic fiber equal to 0.1% of the weight of the main material, wherein: the particle size of fused magnesia is ≤ 0.1mm, the particle size of spinel micropowder is ≤ 25μm, and the active The particle size of alumina powder is ≤0.1mm, and the explosion-proof organic fiber is polyethylene fiber; the size of various particles in fus...

Embodiment 3

[0045] A corundum-spinel castable for dipping pipes of a RH refining furnace is composed of a main material and an admixture, and the components of the main material by weight percentage are:

[0046] Fused white corundum accounts for 50%,

[0047] Fused dense corundum accounts for 15%,

[0048] Fused magnesia powder accounts for 10%,

[0049] Spinel powder accounts for 10%,

[0050] Activated alumina powder accounts for 6%,

[0051] Calcium aluminate cement group accounted for 4%,

[0052] Zirconia sol accounts for 5%,

[0053]The admixtures are FDN water reducing agent equal to 0.8% of the weight of the main material and explosion-proof organic fiber equal to 0.1% of the weight of the main material, wherein: the particle size of fused magnesia is ≤ 0.1mm, the particle size of spinel micropowder is ≤ 25μm, active The particle size of alumina powder is less than or equal to 0.1mm, and the explosion-proof organic fiber is made of polypropylene fiber and polyethylene fiber ...

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
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a corundum-spinel casting material for a dip pipe of an RH refining furnace, which is composed of a main material and an admixture, wherein the main material comprises the following components in percentage by weight: 35-60% of fused white corundum, 10-25% of fused compact corundum, 1-10% of fused magnesite powder, 1-10% of ultrafine spinel micropowder, 3-10% of active aluminum oxide powder, 3-10% of calcium aluminate cement group and 1-5% of zirconium oxide sol; and the admixture comprises an FDN water-reducing agent and explosion-proof organic fibers. Practice proves that the casting material is high in slag corrosion resistance and fine in thermal shock resistance and can effectively prolong the service life of an inserted pipe.

Description

technical field [0001] The invention relates to a refractory material used in the field of iron and steel smelting, in particular to a corundum-spinel castable for dipping pipes of a RH refining furnace. Background technique [0002] The RH refining furnace is one of the indispensable and important equipment for producing high-quality steel in the refining process outside the furnace. The dip tube is the key link that restricts the life of the RH furnace. The reason is that the working conditions of the dip tube are extremely harsh. In addition to slag contact, it is also subjected to extreme cold and extreme heat during intermittent operation. On the one hand, because the castable is easy to stick to slag, the thick slag attached to the outer surface of the dip tube will seriously affect the normal production, and at the same time, the castable will collapse during the scraping process with the slag scraper; on the other hand, due to the heat resistance of the castable Poo...

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): C04B35/66
Inventor 邹龙雷中兴龚仕顺刘黎徐超周辉刘良兵王忠
Owner 武汉钢铁有限公司
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