Metallurgical furnace unit

• US 6,060,015 A
• Filed: 05/05/1998
• Issued: 05/09/2000
• Est. Priority Date: 05/23/1997
• Status: Expired due to Term

• Current Assignee: Boliden Contech AB
• Original Assignee: Boliden Contech A. B.
• Inventors: Lundin, Lars, Marklund, Sam, K.ang.gstrom, Per
• Primary Examiner(s): KASTLER, SCOTT R
• Application Number:
  US09/072,451
• Time in Patent Office: 735 Days
• Field of Search: 266/245, 266/246, 266/275
• US Class Current: 266/246
• CPC Class Codes: C21C 5/42 Constructional features of converters
• CPC Class Codes: F27B 3/06 with movable working chambers or hearths, e.g. tiltable , oscillating or describing a composed movement
• CPC Class Codes: F27B 7/2083 Arrangements for the melting of metals or the treatment of molten metals
• CPC Class Codes: F27B 7/2206 Bearing rings

Abstract

A metallurgical furnace unit (1) includes a cylindrical furnace body (2) which is intended for rotation and/or tilting or like movement and is provided with at least one ring (7) mounted outside the furnace body (2) and functioning to enable such movement to take place. Each ring (7) is spaced from the furnace body (2) and connected to said body by means of a force transferring supporting-member (6) that extends in the longitudinal direction of the furnace unit (1). The supporting member (6) is adapted to prevent the transfer of furnace body movements caused by thermal expansion to the ring (7), and to take-up external loads from the intrinsic weight of the furnace body and the weight of the furnace charge. The invention is characterized in that the supporting member (6) has the form of a closed mantle which surrounds the furnace body (2) and which is connected to the furnace body (2) and to the ring (7) respectively by means of a flexible attachment that permits a given, limited change in the angle between the mantle (6) and the furnace body (2). This angle may change as a result of movements of the furnace body (2) caused by thermal expansion. As a result of the inventive design of these attachments. these movements are eliminated, in the absence of any significant curvature or other deformation of the actual mantle (6).

Claims

1. A metallurgical furnace unit having a cylindrical furnace body adapted for rotation and/or tilting movement and provided with at least one ring which is arranged outside the furnace body and functions to enable said movement to take place, wherein each ring is disposed at a distance from the furnace body and connected thereto by a force-transferring supporting member which extends in a longitudinal direction of the furnace unit and which is adapted to prevent the transfer to thermal-expansion movement of the furnace body to the ring and to take-up external loads from the intrinsic weight of the furnace body and the weight of the furnace charge, wherein the supporting member comprises a closed mantle which surrounds the furnace body and which is connected to the furnace body and to the ring respectively by an attachment being so flexible as to permit a limited change in the angle between the mantle and the furnace body that can occur as a result of movements of the furnace body caused by thermal expansion, therewith eliminating said movements in the absence of any significant curvature or other deformation of the mantle.

2. The metallurgical furnace unit according to claim 1, wherein the mantle is cylindrical and is connected at one end or at a location in the proximity of said one end to a flange fastened to the furnace body and projecting outwardly therefrom.

3. The metallurgical furnace unit according to claim 1, wherein the mantle is conical and attached to the furnace body at its end of smallest cross-section.

4. The metallurgical furnace unit according to claim 3, wherein a heat insulating shield is disposed between the ring and the furnace body.

5. The metallurgical furnace unit according to claim 4, wherein the mantle and/or flange on the furnace body includes through-penetrating, air-cooling holes.

7. A metallurgical furnace unit according to claim 2, wherein a heat insulating shield is disposed between the ring and the furnace body.

8. A metallurgical furnace unit according to claim 1, wherein a heat insulating shield is disposed between the ring and the furnace body.

9. A metallurgical furnace unit according to claim 3, wherein the mantle and/or the flange on the furnace body includes through-penetrating, air-cooling holes.

10. A metallurgical furnace unit according to claim 2, wherein the mantle and/or the flange on the furnace body includes through-penetrating, air-cooling holes.

11. A metallurgical furnace unit according to claim 1, wherein the mantle and/or the flange on the furnace body includes through-penetrating, air-cooling holes.

12. A metallurgical furnace unit according to claim 8, wherein the mantle and/or the flange on the furnace body includes through-penetrating, air-cooling holes.

13. A metallurgical furnace unit according to claim 7, wherein the mantle and/or the flange on the furnace body includes through-penetrating, air-cooling holes.

6. A top-blown rotary converter having a cylindrical furnace body, a conical bottom part and an upper part and having a support ring disposed outside the cylindrical furnace body, said support ring being spaced from the furnace body and connected thereto through the medium of a cylindrical or conical supporting member which extends in the longitudinal direction of te converter and functions to take-up movements caused by thermal expansion of said furnace body, wherein the supporting member is comprised of a closed mantle which surrounds the furnace body and which is connected to the furnace body and to the ring respectively with a flexible attachment that will permit given, limited angle-changes between the mantle and the furnace body, said angle changes being liable to occur as a result of movements of the furnace body caused by thermal expansion, wherewith said movements are eliminated in the absence of significant curvature or other deformation of the actual mantle.