Injector device for blowing oxygen-rich gases on or in, in a metallurgical unit or melting vessel, and electric arc furnace

Patent metadata

Field	Value
Publication number	US-9453680-B2
Application number	US-201415026320-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Oct 8, 2013
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

The invention relates to an injector apparatus ( 1 ) for the pyrometallurgical treatment of metals, molten metals and/or slags in a metallurgical unit or melting vessel, said apparatus comprising an injector device ( 2, 3 ) for producing a high-velocity gas jet ( 5 ) from an oxygen gas jet ( 6 ) and an ignited combustible gas/air mixture jet ( 7 ), in which the injector device ( 2, 3 ) comprises a de Laval nozzle element ( 8 ) for producing the oxygen gas jet ( 6 ), said de Laval nozzle element being arranged in a nozzle head part ( 41 ), and in which the combustible gas/air mixture ( 7 ) can be mixed by means of a mixing element ( 9 ) for mixing combustible gas ( 32 ) and air ( 36 ), wherein the de Laval nozzle element ( 8 ) and the mixing element ( 9 ) are arranged jointly along the center longitudinal axis ( 13 ) of the injector device ( 2, 3 ), one behind the other, such that they can be detached from one another.

First claim

The invention claimed is:

1. An injector apparatus ( 1 ) for the pyrometallurgical treatment of metals, molten metals and/or slags in a metallurgical unit or melting vessel, said apparatus comprising an injector device ( 2 , 3 ) for producing a high-velocity gas jet ( 5 ) from an oxygen gas jet ( 6 ) and an ignited combustible gas/air mixture jet ( 7 ), in which the injector device ( 2 , 3 ) comprises a de Laval nozzle element ( 8 ) disposed in a nozzle head part ( 41 ) for producing the oxygen gas jet ( 6 ), and in which the combustible gas/air mixture ( 7 ) can be mixed by means of a mixing element ( 9 ) for mixing combustible gas ( 32 ) and air ( 36 ), characterized in that the de Laval nozzle element ( 8 ) and the mixing element ( 9 ) are arranged jointly within and/or on the nozzle head part ( 41 ) along the center longitudinal axis ( 13 ) of the injector device ( 2 , 3 ), detachably from one another and one behind the other, so that between the nozzle head ( 41 ) and the de Laval nozzle element ( 8 ), an annular space ( 43 ) is formed into which a combustible gas channel ( 34 ) and an air channel ( 38 ) of the mixing element ( 9 ) open.

2. The injector apparatus ( 1 ) according to claim 1 , characterized in that the de Laval nozzle element ( 8 ) and the mixing element ( 9 ) are rotary components produced by machining, which are connected directly to one another in a force-fitting and/or form-fitting manner.

3. The injector apparatus ( 1 ) according to claim 2 , characterized in that the size of the annular space ( 43 ) can be adjusted based on the axial distance between the de Laval nozzle element ( 8 ) and the mixing element ( 9 ).

4. The injector apparatus ( 1 ) according to claim 3 , characterized in that the axial distance between the de Laval nozzle element ( 8 ) and the mixing element ( 9 ) can be adjusted by means of various annular spacer disks ( 44 ).

5. The injector apparatus ( 1 ) according to claim 1 , characterized in that the de Laval nozzle element ( 8 ) has an external thread ( 14 ) by means of which the de Laval nozzle element ( 8 ) can be screwed into an internal thread ( 15 ) of the mixing element ( 9 ).

6. The injector apparatus ( 1 ) according to claim 1 , characterized in that the de Laval nozzle element ( 8 ) and the mixing element ( 9 ) are arranged concentrically within and/or on the nozzle head part ( 41 ).

7. The injector apparatus ( 1 ) according to claim 1 , characterized in that the de Laval nozzle element ( 8 ) is arranged centered around the center longitudinal axis ( 13 ) of the injector device ( 2 , 3 ) by means of the mixing element ( 9 ).

8. The injector apparatus ( 1 ) according claim 1 , characterized in that the injector apparatus ( 1 ) has an injector mount ( 40 ) for supporting the injector device ( 2 , 3 ) in the interior of the metallurgical unit or melting vessel, wherein the injector mount ( 40 ) comprises the nozzle head part ( 41 ).

9. The injector apparatus ( 1 ) according to claim 1 , characterized in that the nozzle head part ( 41 ) comprises a positioning device ( 50 ) for at least one igniting means ( 51 ), wherein the at least one igniting means ( 51 ) is disposed on the nozzle head part ( 41 ) in such a way that the at least one igniting means ( 51 ) projects into an annular space ( 43 ) formed by the de Laval nozzle element ( 8 ) and the nozzle head part ( 41 ).

10. The injector apparatus ( 1 ) according to claim 9 , characterized in that the at least one igniting means ( 51 ) is arranged perpendicular to the center longitudinal axis ( 13 ) of the injector device ( 2 , 3 ) on the nozzle head part ( 41 ).

11. The injector apparatus ( 1 ) according to claim 1 , characterized in that the nozzle head part ( 41 ) has a plurality of oxygen ducts ( 53 ) having oxygen outlet openings ( 54 ), to allow air ( 36 ) or oxygen from the exterior to be conducted onto a hot gas jet ( 55 ) produced from the ignited combustible gas/air mixture ( 7 ).

12. The injector apparatus ( 1 ) according to claim 11 , characterized in that the oxygen ducts ( 53 ) are arranged within the nozzle head part ( 41 ) concentrically to and angularly around the center longitudinal axis ( 13 ) of the injector device ( 2 , 3 ).

13. The injector apparatus ( 1 ) according to claim 11 , characterized in that the oxygen outlet openings ( 54 ) are arranged within an outlet opening ( 56 ) of the nozzle head part ( 41 ).

14. The injector apparatus ( 1 ) according to claim 1 , characterized in that the nozzle head part ( 41 ) comprises a quick-release device ( 45 ) for clamping the de Laval nozzle element ( 8 ) and/or the mixing element ( 9 ) in a form-fitting connection.

15. The injector apparatus ( 1 ) according to claim 14 , characterized in that the mixing element ( 9 ) can be clamped in a form-fitting connection to the nozzle head part ( 41 ) in such a way that the de Laval nozzle element ( 8 ) is detachably secured on the nozzle head part ( 41 ) by means of the mixing element ( 9 ).

16. The injector apparatus ( 1 ) according to claim 14 , characterized in that the nozzle head part ( 41 ) quick-release device ( 45 ) is embodied laterally at an end of the nozzle head part ( 41 ) that faces away from an outlet opening ( 56 ) such that three or more clamping means of the quick-release device ( 45 ) are arranged concentrically around the center longitudinal axis ( 13 ) of the injector device ( 2 , 3 ).

17. The injector apparatus ( 1 ) according to claim 14 , characterized in that the mixing element ( 9 ) quick-release device ( 45 ) comprises a lateral compressible ring element ( 23 ), in particular a Viton® O-ring ( 24 ).

18. The injector apparatus ( 1 ) according to claim 1 , characterized in that an injector mount ( 40 ) for supporting the injector device ( 2 , 3 ) comprises an articulated unit ( 60 ), by means of which the nozzle head part ( 41 ) is arranged articulated on the injector mount ( 40 ).

19. The injector apparatus ( 1 ) according to claim 18 , characterized in that the articulated unit ( 60 ) has an articulated shield part ( 61 ) and an articulated head part ( 62 ), wherein the articulated head part ( 62 ) comprises the nozzle head part ( 41 ).

20. The injector apparatus ( 1 ) according to claim 18 , characterized in that the articulated head part ( 62 ) can be removably secured to the articulated shield part ( 61 ) by means of a retaining ring element ( 63 ).

21. The injector apparatus ( 1 ) according to claim 1 , characterized in that the nozzle head part ( 41 ) is permanently disposed on an injector mount ( 40 ) for supporting the injector device ( 2 , 3 ).

22. The injector apparatus ( 1 ) according to claim 21 , characterized in that the nozzle head part ( 41 ) is firmly bonded to the injector mount ( 40 ).

23. The injector apparatus ( 1 ) according to claim 1 , characterized in that the injector apparatus ( 1 ) comprises a cooling device which operates by conduction, in which the nozzle head part ( 41 ) comprises a metallic cooling contact surface ( 65 ), which is in direct functional contact with a metallic cooling contact surface ( 66 ) of an injector mount ( 40 ) for supporting the injector device ( 2 , 3 ).

24. The injector apparatus ( 1 ) according to claim 1 , characterized in that the nozzle head part ( 41 ) at least partially forms wall regions ( 67 ) of a coolant channel ( 68 ) of a coolant device in the injector mount ( 40 ).

25. The injector apparatus ( 1 ) according to claim 1 , charact

Assignees

• Sms Group Gmbh

Inventors

• Buess Stefan

Classifications

• F27D2099/0055

  Fuel · CPC title

• F27D2003/169

  Construction of the lance, e.g. lances for injecting particles · CPC title

• F27B3/225

  Oxygen blowing · CPC title

• F27D3/16 Primary

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

• F27D2099/0056

  Oxidant · CPC title