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

Low-carbon aluminous-carbon refractory material for continuous casting and preparation method thereof

A refractory material, low-carbon aluminum technology, applied in the field of refractory materials

Inactive Publication Date: 2011-04-06
HENAN UNIV OF SCI & TECH +1
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the carbon content in aluminum-carbon refractories is greatly reduced, the thermal shock resistance and erosion resistance of the material will inevitably be reduced, which will affect the safety and life of aluminum-carbon refractories.
The existing methods are: adding ZrO2-SiC composite powder to the aluminum-carbon refractory to improve the performance of the refractory, but the existing technology is not suitable for ZrO2-SiC The synthesis of composite powder needs to be carried out in an Ar gas atmosphere, which is difficult for industrial production, and the graphite content of the produced Al2O3-C refractory is as high as 25%. It is difficult to meet the production requirements of clean steel

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

preparation example Construction

[0022] A method for preparing a low-carbon aluminum-carbon refractory for continuous casting, the method steps are as follows:

[0023] Step 1. After batching alumina fine powder, zirconia-nitride composite powder, alumina micropowder, carbon and antioxidant according to the proportions mentioned above, they are all put into a pre-mixer for pre-mixing to produce The mixed powder is ready for use;

[0024] Step 2: Mix the alumina aggregate and binder according to the ratio mentioned above, first put the alumina aggregate into the mixer and knead for 2-5 minutes, then add the binder and knead for 2-10 minutes, then add The mixed powder prepared in step 1 is discharged after kneading for 15-45 minutes, and processed into green body after being trapped for 8-48 hours, and set aside;

[0025] Step 3. Place the green body prepared in step 2 at a temperature of 150-250°C for 12-36 hours, and then keep it at a temperature of 900-1500°C for 8-24 hours to obtain a composite powder cont...

Embodiment 1

[0034] A low-carbon aluminum-carbon refractory material for continuous casting, the main materials are tabular alumina with a particle size of ≤3mm, tabular alumina with a particle size of ≤0.088mm, sintered corundum with a particle size of ≤0.074mm, and zirconia-oxygen nitrogen with a particle size of ≤0.074mm Composed of silicon dioxide composite powder, alumina micropowder with a particle size of ≤0.005mm, carbon black with a particle size of ≤0.044mm, and simple silicon powder with a particle size of ≤0.088mm. The addition ratio is: 60% of tabular alumina with a particle size of ≤5mm, 10% of tabular alumina with a particle size of ≤0.088mm, 10% of sintered corundum, 2% of zirconia-silicon oxynitride composite powder, 10% of alumina micropowder, 3% carbon black, 5% silicon powder, and 4.0% of the total weight of the main material.

[0035] A method for preparing a low-carbon aluminum-carbon refractory for continuous casting, the method steps are as follows:

[0036] Step 1...

Embodiment 2

[0041] A low-carbon aluminum-carbon refractory material for continuous casting, the main materials are sintered corundum with a particle size of ≤5mm, plate-shaped corundum with a particle size of ≤0.074mm, zirconia-zirconium oxynitride composite powder with a particle size of ≤0.088mm, and a particle size of ≤ Alumina micropowder of 0.002mm, graphite with a particle size of ≤0.20mm, metal aluminum powder with a particle size of ≤0.074mm, elemental silicon powder, and boron carbide. The auxiliary material is solid powdery phenolic resin. : 65% sintered corundum, 16% tabular corundum, 8% zirconia-zirconium oxynitride composite powder, 5% alumina micropowder, 2% graphite, 1% metallic aluminum powder, 2% silicon powder, boron carbide 1%, the addition of solid powdered phenolic resin is 3% of the total weight of the main material.

[0042] A method for preparing a low-carbon aluminum-carbon refractory for continuous casting, the method steps are as follows:

[0043] Step 1. After...

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a low-carbon aluminous-carbon refractory material for continuous casting and a preparation method thereof, belonging to an aluminous-carbon refractory material. The low-carbon aluminous-carbon refractory material for continuous casting comprises the following main ingredients in percentage by weight: 60-65% of alumina aggregate, 5-25% of alumina powder, 2-15% of zirconium dioxide-nitride composite powder, 2-15% of alumina micro powder, 0-3% of carbon and 2-10% of antioxidant, as well as an auxiliary ingredient, i.e. a bonding agent, wherein the addition amount of the bonding agent is 3-12% of the total weight of the main ingredients. The preparation method comprises the following steps: premixing the raw materials according to the proportion, ageing, carrying out machine molding or isostatic molding, drying, and firing to obtain the finished product under a nitrogen atmosphere. By adopting the method, the content of the carbon in the refractory material is decreased, and the resistance to oxidation and the thermal shock stability are improved at the same time.

Description

technical field [0001] The invention belongs to the field of refractory materials and relates to an aluminum-carbon refractory material, in particular to a low-carbon aluminum-carbon refractory material for continuous casting containing zirconia-nitride composite powder components and a preparation method thereof. Background technique [0002] Aluminum carbon refractory is a high-grade carbon composite refractory material with alumina and carbon as the main raw materials, organic matter such as phenolic resin as the binder, and a small amount of antioxidant. Since aluminum-carbon refractories combine the advantages of alumina and graphite, they have excellent thermal shock stability and slag resistance, and are widely used in continuous steel casting processes with harsh service conditions. Refractory materials for continuous casting such as slide plates, long nozzles, submerged nozzles and integral stoppers are mainly aluminum-carbon refractory materials. The oxidation of ...

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): C04B35/66C04B35/10C04B35/622
Inventor 于仁红王宝玉周宁生张萌萌王慧芳杜鹏辉
Owner HENAN UNIV OF SCI & TECH
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