# US 7,611,663 B2 · Industrial furnace and associated jet element

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- Number: US 7,611,663 B2
- Document ID: US7611663B2
- Status: Granted
- Kind: B2
- Application number: 10/573,172
- Filed: 2004-10-14
- Published: 2006-12-07
- Granted: 2009-11-03
- Earliest claimed: 2003-10-15
- Assignees: Andritz Maerz GmbH
- Inventors: Uwe Zulehner; Hans Rinnhofer
- Web page: https://patentgrep.com/patent/US7611663B2

## CPC

- C21C 5/48: Bottoms or tuyéres of converters
- F27D 1/10: Monolithic linings; Supports therefor
- F27D 1/12: incorporating cooling arrangements
- F27D 1/141: {Anchors therefor}
- F27D 3/16: Introducing a fluid jet or current into the charge (F27D3/18 takes precedence)
- F27D 9/00: Cooling of furnaces or of charges therein (casings, linings, walls or roofs incorporating cooling arrangements F27D1/12)
- F27D 99/0033: {using burners}
- C21C: PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE

## Abstract

The present invention relates to an industrial furnace for smelting metals, in particular nonferrous metals, and the respective nozzle element.

## Claims

### Claim 1

A nozzle element for introducing gas into an industrial furnace for melting metals, having the following features:
a) a nozzle body (3) made of a refractory material having a hot side (5) and a cold side (7);
b) a metal jacket (9) covering the refractory material on the cold side (7) of the nozzle body (3);
c) heat-conducting elements (11, 13, 15, 17/17.2) which are in contact with the metal jacket (9) and extend into the refractory material whereby the heat-conducting elements (11, 13, 15, 17.1, 17.2)) are able to absorb heat and convey it rapidly to the metal jacket (9), said heat-conducting elements (11, 15, 17, 17.1, 17.2) each having an end that faces the hot side (5) of the nozzle body (3) and that is disposed a distance from the hot side (5) of the nozzle body (3);
d) the metal jacket (9) is coolable; and
e) an outer nozzle pipe (19) which extends through the metal jacket (9) and the nozzle body (3) from the cold side (7) to the hot side (5) of the nozzle body (3).

### Claim 2 (depends on 1)

The nozzle element according to claim 1, wherein in the metal jacket (9) and the heat-conducting elements (11, 13, 15, 17, 17.1, 17.2) are all made of the same material.

### Claim 3 (depends on 1)

The nozzle element according to claim 1, wherein the metal jacket (9) and heat-conducting elements (11, 13, 15, 17, 17.1, 17.2) are made of copper or stainless steel.

### Claim 4 (depends on 1)

The nozzle element according to claim 1, wherein the heat-conducting elements (11, 13, 15, 17, 17.1, 17.2) are arranged essentially in a ring-like pattern around the outer nozzle pipe (19).

### Claim 5 (depends on 1)

The nozzle element according to claim 1, wherein heat-conducting elements (11, 13, 15, 17, 17.1, 17.2) are provided in the form of rods, webs or plates.

### Claim 6 (depends on 1)

The nozzle element according to claim 1, wherein the metal jacket (9) can be cooled by a cooling medium.

### Claim 7 (depends on 1)

The nozzle element according to claim 1, wherein a device is provided through which a fluid can be passed over the surface of the metal jacket (9) or through the metal jacket (9).

### Claim 8 (depends on 7)

The nozzle element according to claim 7, wherein a channel-shaped device (8) is provided for conducting the fluid.

### Claim 9 (depends on 1)

The nozzle element according to claim 1 with an inner nozzle pipe (21) displaceably arranged in the outer nozzle pipe (19) along its longitudinal axis (A).

### Claim 10 (depends on 1)

The nozzle element according to claim 1, wherein an inner nozzle pipe (21) is arranged inside the outer nozzle pipe (19) and at a distance from it.

### Claim 11 (depends on 10)

The nozzle element according to claim 10, wherein the inner nozzle pipe (21) and the outer nozzle pipe (19) are held at a distance from one another by spacers.

### Claim 12 (depends on 1)

The nozzle element according to claim 1, wherein the outer circumferential surface of an inner nozzle pipe (21) has a thread which engages in an inside thread arranged on the surface of the outer nozzle pipe (19) facing the inner nozzle pipe (21).

### Claim 13 (depends on 1)

The industrial furnace, wherein a nozzle element according to claim 1 is arranged in its outside wall.