Gas purging element and associated gas feed line

Patent metadata

Field	Value
Publication number	US-9683272-B2
Application number	US-201314411865-A
Country	US
Kind code	B2
Filing date	Aug 7, 2013
Priority date	Aug 27, 2012
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

The invention relates to a gas purging element at a metallurgical vessel as well as a corresponding gas supply pipe.

First claim

The invention claimed is:

1. Gas purging device for metallurgical applications comprising a gas supply pipe ( 30 ) and a gas purging element ( 10 ), the gas purging device having the following characteristics:
a. the gas purging element ( 10 ) features a ceramic fireproof body ( 10 k ) with a first end ( 10 u ) and a second end ( 10 o ),
b. the second end ( 10 o ) is in the mounted position of the gas purging element in contact with a metal melt,
c. the first end ( 10 u ) is covered by a metal coat ( 12 ), which features an opening ( 16 ) to which a gas supply adapter ( 20 ) connects, the gas supply adapter ( 20 ) has a first end ( 20 . 1 ) and a second end ( 20 . 2 ),
d. the gas purging element ( 10 ), the body ( 10 k ) and the gas supply adapter ( 20 ) are designed in such a way that a treatment gas which is supplied via the gas supply adapter ( 20 ) flows through the body ( 10 k ) and exits the body ( 10 k ) at the second end ( 10 o ),
e. at the second end ( 20 . 2 ) the gas supply adapter ( 20 ) is connected via a gas connection area ( 22 ) to the metal coat ( 12 ), and at the first end ( 20 . 1 ) the gas supply adapter ( 20 ) is designed as a plug or as a socket of a push-fit connection for connection to a corresponding socket or a corresponding plug of the gas supply pipe ( 30 ), as well as
f) a secure element ( 40 ) with an inner screw thread ( 42 i ), mechanically securing the push-fit connection according to a cap nut together with a corresponding outer screw thread at the first end ( 20 . 1 ) of the gas supply adapter ( 20 ).

2. Gas purging device according to claim 1 , wherein the gas supply adapter ( 20 ) extends away from the ceramic body ( 10 k ), starting from the gas connection area ( 22 ) to the metal coat ( 12 ).

3. Gas purging device according to claim 1 , wherein the gas supply adapter ( 20 ) extends towards the ceramic body ( 10 k ), starting from the gas connection area ( 22 ) to the metal coat ( 12 ).

4. Gas purging device according to claim 1 , wherein the gas supply adapter ( 20 ), which is designed as a plug, features one of the following geometric shapes on the outside: cone, frustocone, prism.

5. Gas purging device according to claim 1 , wherein the gas supply adapter ( 20 ), which is designed as a socket features one of the following geometric shapes on the outside: negative cone, negative frustocone, negative prism.

6. Gas purging device according to claim 1 , wherein the gas supply adapter ( 20 ) features a break-through protection against invading metal melt.

7. Gas purging device according to claim 1 , wherein the gas supply adapter features a back pressure valve ( 26 , 28 ).

8. Gas purging device according to claim 1 whose gas supply adapter ( 20 ) features a length, in the direction of a stream (G) of the supplied gas, of less than 20 cm.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Trummer Bernd
• Klikovich Michael
• Kulp Roman
• Kneis Leopold

Classifications

• C21C5/35

  Blowing from above and through the bath · CPC title

• C21C7/072 Primary

  Treatment with gases (C21C7/06, C21C7/064, C21C7/068 take precedence) · CPC title

• F27D3/16 Primary

  Introducing a fluid jet or current into the charge (F27D3/18 takes precedence) · CPC title

• C21C5/34

  Blowing through the bath (C21C5/35 takes precedence) · CPC title

• B22D1/002

  Treatment with gases (C21C7/072, C22B9/05 take precedence) · CPC title