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

Preparation method of silicon carbide ceramic film for metallurgical nozzle

A technology of silicon carbide ceramics and raw materials, applied in the field of functional refractory materials, can solve the problems of prolonging the thermal shock resistance time, no innovation of thermal shock resistance principle, and failure to improve the working life of the nozzle, so as to reduce the impact of thermal shock and prolong the shock resistance time , the effect of low price

Active Publication Date: 2019-05-28
JIANGSU TAIRUI REFRACTORY
View PDF5 Cites 2 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
  • 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; SiN 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 the ...

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; SiN 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 sur...

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; SiN 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 membrane 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 sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a silicon carbide ceramic film for a metallurgical nozzle. The preparation method comprises the following steps that (1) all raw materials including Al2O3, SiC, ZrO2, SiN4, calcined kaolin, 3-5 parts of talc, a small-particle-size pore-forming agent, a large-particle-size pore-forming agent, a binder, a lubricating agent, a dispersant and water are mixed evenly; (2) the working surface of a long nozzle or a submerged nozzle is coated with the mixed raw materials and heated to 350-450 DEG C, and the temperature is maintained for 30-50 minutes; and(3) heating continues being conducted to 1350-1420 DEG C, the temperature is maintained for 2-3 hours, and the ceramic film is baked on the working surface of the long nozzle or the submerged nozzle.The ceramic film prepared by the preparation method is of a porous structure, can absorb thermal impact, provides thermal shock buffer for a nozzle body and falls off after the nozzle body works for 5-7 hours, the fallen-off ceramic film is replaced with a layer of new ceramic film for the nozzle body to continue working, and the working life is prolonged to 16-20 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 for metallurgical nozzles. Background technique [0002] The rapid development of continuous casting technology has resulted in the corresponding development and improvement of refractory materials in terms of variety and quality, and the development of refractory materials for continuous casting 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 reas...

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): C04B35/106C04B35/103C04B35/622C04B38/06
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