[특허]Refractory casting method

[미국특허] Refractory casting method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B22C-001/00 B22C-007/00
출원번호	UP-0956477 (2004-10-01)
등록번호	US-7562694 (2009-07-29)
발명자 / 주소	Connors, Jr., Charles W. Shah, Shirish
출원인 / 주소	Magneco/Metrel, Inc.
대리인 / 주소	Brinks Hofer Gilson & Lione
인용정보	피인용 횟수 : 4 인용 특허 : 21

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A method of casting a refractory article. The method includes providing a mold formed from a slurry composition comprising plaster and fibers and adding a refractory composition to the mold. The method also includes allowing the refractory composition to set. The refractory composition comprises col

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The invention claimed is: 1. A method of casting a refractory article comprising: providing a pattern of a generally cylindrical refractory article; providing a slurry composition comprising plaster and at least 20% fibers by weight; disposing the slurry composition around the pattern; allowing the slurry composition to set to form a compliant mold; removing the pattern from the mold; adding a refractory composition comprising colloidal silica to the mold; and heating the refractory composition to form the refractory article. 2. The method of claim 1 wherein the mold and refractory composition are heated at a temperature of at least about 1000° F. 3. The method of claim 1 wherein the refractory composition comprises about 55% to about 90% alumina by weight, up to about 30% silicon carbide by weight, and about 2% to about 20% silica. 4. The method of claim 1 wherein the fibers are paper fibers. 5. The method of claim 4 wherein the slurry composition comprises at least about 25% paper fiber by weight. 6. The method of claim 4 wherein the slurry composition comprises at least about 33% paper fiber by weight. 7. The method of claim 1 wherein the refractory article is selected from nozzles, pouring tubes, pump tubes, shrouds, and stopper rods. 8. The method of claim 1 wherein the density of the mold is between about 50 lb/ft3 and about 70 lb/ft3. 9. A method of claim 1 wherein the mold degrades upon heating. 10. The method of casting a refractory article comprising: providing a pattern of a stopper rod; providing a slurry composition comprising plaster; disposing the slurry composition around the pattern; allowing the slurry composition to set to form a compliant mold; removing the pattern from the mold; adding a refractory composition comprising colloidal silica to the mold; and heating the refractory composition to form a stopper rod, wherein the mold degrades upon heating. 11. The method of claim 10 wherein the refractory composition comprises about 55% to about 90% alumina by weight, up to about 30% silicon carbide by weight, and about 2% to about 20% silica. 12. The method of claim 10 wherein the slurry composition comprises at least 20% paper fiber by weight. 13. The method of claim 10 wherein the slurry composition comprises at least about 25% paper fiber by weight. 14. The method of claim 10 wherein the slurry composition comprises at least about 33% paper fiber by weight. 15. The method of claim 10 wherein the stopper rod has a cold modulus of rupture of at least 900 psi. 16. The method of claim 10 wherein the stopper rod has a cold crushing strength of at least 4000 psi. 17. A method of casting a refractory article comprising: providing a pattern of a stopper rod; providing a slurry composition comprising plaster and at least 20% fibers by weight; disposing the slurry composition around the pattern; allowing the slurry composition to set to form a compliant mold with a density of between about 50 lb/ft3 and about 70 lb/ft3; removing the pattern from the mold; adding a refractory composition comprising colloidal silica to the mold; heating the refractory composition to form a stopper rod, wherein the mold degrades upon heating; and removing the stopper rod from the degraded mold. 18. The method of claim 17 wherein the slurry composition comprises at least about 25% paper fiber by weight. 19. The method of claim 17 wherein the slurry composition comprises at least about 33% paper fiber by weight. 20. The method of claim 17 wherein the stopper rod has a cold modulus of rupture of at least 900 psi. 21. The method of claim 17 wherein the stopper rod has a cold crushing strength of at least 4000 psi.

이 특허에 인용된 특허 (21)

Buck Gregory M. (Newport News VA) Vasquez Peter (Newport News VA), Ceramic slip casting technique.
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Connors, Sr., Charles W.; Anderson, Michael W., Colloidal silica refractory system for an electric arc furnace.
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Banerjee Subrata (Glen Ellyn IL) Connors ; Jr. Charles W. (Chicago IL), Composition and method for manufacturing steel-containment equipment.
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Banerjee Subrata (Wheaton IL), Gunning composition.
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Qiang Yu ; Srinivas Veeramasuneni ; Frederick Thomas Jones, Gypsum compositions and related methods.
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Winkelbauer Howard M. (Boston PA) Gallman Harold F. (Cartersville GA), High density fused silica mixes, refractory shapes made therefrom, and method of making the same.
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Desvignes, Cecile; Rancoule, Gilbert, Insulating refractory material.
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Gilbert Brandy FR, Insulating refractory material.
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Chadwick Thomas, Method for accurate replication of shaped articles using sinterable powders.
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Fukao Kaname (Inuyama JPX), Method for producing and method of using slip casting mold.
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Shyu Wan-Tsai (Nan-Tou Hsien TWX), Method of making a ceramic burner head.
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Dehoff William A. (Hanover PA) Dehoff Hugh T. (Hanover PA) Dehoff Chris A. (Hanover PA), Method of making molds.
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Wolter Peter A. (Elgin IL) Esposito Arthur N. (Elgin IL), Method of making refractory ceramic products and the products thereof.
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Banerjee Subrata (Wheaton IL) Anderson Michael W. (Bloomingdale IL), Nonhazardous pumpable refractory insulating composition.
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Buck Gregory M. ; Vasquez Peter, Process for making ceramic mold.
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Natori Tatsuo (Kashiwa JPX) Hioki Susumu (Kashiwa JPX) Shimaguchi Takashi (Ibaraki JPX) Yamada Toshihiro (Ibaraki JPX) Watanabe Akihide (Ibaraki JPX) Kanekatsu Kensuke (Yono JPX), Process for preparing mold.
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Weaver ; Gerald Q. ; Logan ; John C., Process of forming silicon carbide bodies.
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Anderson Michael W. (Bloomingdale IL) Shah Shirish (Carol Stream IL), Pumpable casting composition and method of use.
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Guillo Philippe,FRX ; Hankin Mike,GBX, Refractory material of vitreous silica.
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Lau Sai-Kwing ; Calandra Salvatore J. ; Ohnsorg Roger W., Silicon carbide reinforced silicon carbide composite.
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Natori Tatsuo (Kashiwa JPX) Nakae Hideo (Tokyo JPX) Watanabe Akihide (Ibaraki JPX) Shimaguchi Takashi (Ibaraki JPX), Slip casting mold.
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이 특허를 인용한 특허 (4)

Hanzawa, Shigeru; Suzumura, Hiroyoshi; Yamamoto, Tsutomu, Housing for heating and use method of the same, heating jig and use method of the same, and operation method of heating device.
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Esjunin, Evgeniy E.; DeForte, Robert L., Kiln shoe.
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Soofi, Madjid; Binz, Lara; Anderson, Michael W., Protective coating composition for molten aluminum and alkali metal environments.
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Anderson, Michael W; Snyder, Daniel; Binz, Lara; Boring, Eric, Refractory composition resistant to high temperature shock and creep.
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Refractory casting method 원문보기

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