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

A preparation method of silicon carbide ceramic film for metallurgical nozzle

A technology of silicon carbide ceramics and ceramic membranes, applied in the field of functional refractory materials, can solve problems such as the inability to improve the working life of the nozzle, the lack of innovation in the principle of thermal shock resistance, and the prolongation of the thermal shock resistance time.

Active Publication Date: 2021-04-13
JIANGSU TAIRUI REFRACTORY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above two schemes lay a layer of smooth and dense glaze on the surface of the nozzle body, which is equivalent to strengthening the nozzle body and prolonging the thermal shock resistance time of the body. There is no innovation in the principle of thermal shock resistance, so it is impossible to The working life of the nozzle is significantly and effectively improved

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
  • A preparation method of silicon carbide ceramic film for metallurgical nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The method for preparing a silicon carbide ceramic film in this embodiment includes the following steps:

[0038] (1) Mix each raw material evenly, and the weight of each raw material is:

[0039] al 2 o 3 : 50kg; SiC: 20kg; ZrO 2 : 5kg; Si 3 N 4 : 2kg;

[0040] Calcined kaolin: 5kg; talc: 3kg;

[0041] 6 micron small particle size pore forming agent PMMA: 10kg; 22 micron large particle size pore forming agent PMMA: 15kg;

[0042] Binder methyl cellulose: 15kg; lubricant liquid paraffin: 2kg; dispersant triethanolamine: 1kg; water: 30kg;

[0043] The particle diameters of the above-mentioned solid raw materials are all 3-8 microns, and the raw materials used are commercially available industrial grade products.

[0044] (2) Coat the mixed raw materials on the working surface of the submerged nozzle with a coating thickness of 0.15 mm, and heat to 350° C. for 30 minutes.

[0045] (3) Continue heating to 1350°C, keep for 3 hours, and fire the ceramic membrane on ...

Embodiment 2

[0047] The method for preparing a silicon carbide ceramic film in this embodiment includes the following steps:

[0048] (1) Mix each raw material evenly, and the weight fraction of each raw material is:

[0049] al 2 o 3 : 50kg; SiC: 25kg; ZrO 2 : 6kg; Si 3 N 4 : 3kg;

[0050] Calcined kaolin: 6kg; talc: 4kg;

[0051] 5 micron small particle size pore forming agent PS: 12kg; 20 micron large particle size pore forming agent PS: 18kg;

[0052] Binder hydroxypropyl methylcellulose: 16kg; lubricant corn oil: 3kg; dispersant terpineol: 1.5kg; water: 40kg;

[0053] The particle diameters of the above-mentioned solid raw materials are all 3-8 microns, and the raw materials used are commercially available industrial grade products.

[0054] (2) Coat the mixed raw materials on the working surface of the shroud with a coating thickness of 0.12 mm, and heat to 350° C. for 40 minutes.

[0055] (3) Continue heating to 1380°C, keep for 3 hours, and fire ceramic film on the working...

Embodiment 3

[0057] The method for preparing a silicon carbide ceramic film in this embodiment includes the following steps:

[0058] (1) Mix each raw material evenly, and the weight fraction of each raw material is:

[0059] al 2 o 3 : 40kg; SiC: 30kg; ZrO 2 : 8kg; Si 3 N 4 : 4kg;

[0060] Calcined kaolin: 7kg; talc: 5kg;

[0061] 8 micron small particle size pore former toner: 15kg; 25 micron large particle size pore former toner: 20kg;

[0062] Binder hydroxypropyl methylcellulose: 18kg; lubricant liquid paraffin: 5kg; dispersant polypropylene: 2kg; water: 50kg;

[0063] The particle diameters of the above-mentioned solid raw materials are all 3-8 microns, and the raw materials used are commercially available industrial grade products.

[0064] (2) Coat the mixed raw materials on the working surface of the submerged nozzle with a coating thickness of 0.18 mm, and heat to 450° C. for 50 minutes.

[0065] (3) Continue heating to 1420°C, keep for 2 hours, and fire a ceramic film o...

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 diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a silicon carbide ceramic film for a metallurgical nozzle, comprising the following steps: (1) mixing each raw material evenly: Al 2 o 3 , SiC, ZrO 2 、Si 3 N 4 , calcined kaolin, talc: 3 to 5 parts, small particle size pore forming agent, large particle size pore forming agent, binder, lubricant, dispersant, water; (2) Coat the mixed raw materials on the long nozzle Or on the working surface of the submerged nozzle, heat to 350-450°C and keep for 30-50 minutes; (3) continue to heat to 1350-1420°C, keep for 2-3 hours, and burn on the working surface of the long nozzle or submerged nozzle. Made of ceramic membrane. The ceramic membrane prepared by the present invention has a porous structure, which can absorb thermal shock and provide thermal shock buffer for the nozzle body. After working for 5 to 7 hours, the ceramic membrane falls off, and the nozzle body is replaced with a new layer of ceramic membrane to continue working, and the working life is shortened. Extended to 16 to 20 hours.

Description

technical field [0001] The invention relates to the technical field of functional refractory materials, in particular to a method for preparing a silicon carbide ceramic film used in metallurgical nozzles. Background technique [0002] The rapid development of continuous casting technology has resulted in the corresponding development and improvement of related refractory materials in terms of variety and quality, and the development of continuous casting refractory materials has a significant impact on continuous casting production and continuous casting billet quality. The three major parts of continuous casting: integral stopper, long nozzle and submerged nozzle are the important parts of the tundish of the continuous casting unit. Prevent secondary oxidation of molten steel and realize continuous casting process. The manufacturing level of the three major parts of continuous casting, product service reliability, high performance of service life, functionalization, and r...

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 Patents(China)
IPC IPC(8): C04B35/106C04B35/103C04B35/622C04B38/06
Inventor 吴建湘吴佩霞薛文东
Owner JIANGSU TAIRUI REFRACTORY
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