Melting furnace with simultaneously rotatable and movable electrode rod

Patent metadata

Field	Value
Publication number	US-11371779-B2
Application number	US-201816762066-A
Country	US
Kind code	B2
Filing date	Nov 7, 2018
Priority date	Nov 8, 2017
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

Melting furnace (1), in particular for the production of metal alloys by melting alloying constituents, with a melting crucible (10), a cylindrical electrode rod (40) with a consumable electrode (41) attached thereto and a power supply (50) that is configured to supply the electrode (41) with power via the electrode rod (40), wherein the electrode rod (40) can be rotated about its own axis and moved along its own axis during the melting process.

First claim

The invention claimed is:

1. A melting furnace ( 1 ), in particular for producing metal alloys and non-ferrous alloys, comprising:
an electrode rod ( 40 ) with a consumable electrode ( 41 ) attached thereto, the consumable electrode comprising alloying constituents to be remelted;
a melting crucible ( 10 ); and
a power supply ( 50 ) that is configured to supply the consumable electrode ( 41 ) with power via the electrode rod ( 40 ),
wherein the electrode rod ( 40 ) is rotatable about a longitudinal axis and can be moved along the longitudinal axis during a melting process and
wherein a remelted ingot comprising the alloying constituents is formed in the melting crucible during the melting process, and
wherein the melting furnace ( 1 ) is configured to simultaneously rotate the electrode rod ( 40 ) about the longitudinal axis and oscillate the electrode rod ( 40 ) along the longitudinal axis during the melting process.

2. The melting furnace ( 1 ) according to claim 1 ,
wherein the electrode rod ( 40 ) is attached via an electrode receptacle ( 31 ) to an electrode carriage ( 30 ), and
wherein the electrode carriage ( 30 ) is held on and movably guided by a furnace column ( 62 ).

3. The melting furnace ( 1 ) according to claim 2 ,
wherein the electrode carriage ( 30 ) is movable by means of a spindle drive ( 33 ),
wherein the spindle drive ( 33 ) is fixed to the electrode carriage ( 30 ) and has one or more motor-driven spindle nuts that interact with a spindle ( 61 ) that runs substantially parallel to the furnace column ( 62 ).

4. The melting furnace ( 1 ) according to claim 2 , further comprising a motorized rotary drive ( 32 ) for rotating the electrode rod ( 40 ) about the longitudinal axis, the rotary drive ( 32 ) being mounted on the electrode receptacle ( 31 ).

5. The melting furnace ( 1 ) according to claim 1 ,
wherein the electrode rod ( 40 ) is electrically connected to the power supply ( 50 ) via a current collector ( 42 ), and
wherein the current collector ( 42 ) has one or more contacting devices ( 43 ), which are configured to transfer the current provided by the power supply ( 50 ) to the electrode rod ( 40 ).

6. The melting furnace ( 1 ) according to claim 5 , wherein the one or more contacting devices include
a receptacle ( 43 a ) that is electrically connected to the electrode rod ( 40 ) and contains a conductive liquid ( 43 b ) in which a current output that is electrically connected to the power supply ( 50 ) is immersed; and/or
one or more brushes ( 43 d ) which are in frictional contact with the electrode rod ( 40 ); and/or
a shell element ( 43 f ) which is in frictional contact with the electrode rod ( 40 ).

7. The melting furnace ( 1 ) according to claim 5 , wherein the conductive liquid ( 43 b ) is liquid gallium.

8. The melting furnace ( 1 ) according to claim 5 ,
wherein the one or more contacting devices include one or more brushes ( 43 d ) which are in frictional contact with the electrode rod ( 40 ) and
wherein the one or more brushes ( 43 d ) are made of a graphite-containing and/or copper-containing material.

9. The melting furnace ( 1 ) according to claim 5 ,
wherein the one or more contacting devices include a shell element ( 43 f ) which is in frictional contact with the electrode rod ( 40 ) and
wherein the shell element ( 43 f ) is made of a graphite-containing and/or copper-containing material.

10. The melting furnace ( 1 ) according to claim 1 , further comprising
a movable furnace hood ( 20 ), which is configured to close the melting crucible ( 10 ),
wherein the electrode rod ( 40 ) and/or the consumable electrode ( 41 ) is immersed in the melting crucible ( 10 ) through a bushing ( 21 ) in the furnace hood ( 20 ).

11. The melting furnace ( 1 ) according to claim 10 , wherein the bushing ( 21 ) is vacuum-tight and gas-tight.

12. A melting furnace ( 1 ), for producing metal alloys and non-ferrous alloys by melting alloying constituents, comprising:
a furnace column ( 62 );
a melting crucible ( 10 );
a furnace hood ( 20 ) which is configured to close the melting crucible ( 10 ), the furnace hood ( 20 ) being held on movably guided by the furnace column ( 62 );
an electrode carriage ( 30 ) held on and movably guided by the furnace column ( 62 );
an electrode receptacle ( 31 ) attached to the electrode carriage ( 30 );
an electrode rod ( 40 ) with a consumable electrode ( 41 ) attached to the electrode receptacle ( 31 ); and
a power supply ( 50 ) that is configured to supply the consumable electrode ( 41 ) with power via the electrode rod ( 40 ),
wherein the electrode rod ( 40 ) is rotatable about a longitudinal axis and can be moved along the longitudinal axis during a melting process, and
wherein the consumable electrode ( 41 ) is immersed in the melting crucible ( 10 ) through a bushing ( 21 ) in the furnace hood ( 20 ), and
wherein the furnace hood ( 20 ) is attached to the electrode carriage ( 30 ) by a hydraulic cylinder ( 23 ), the hydraulic cylinder ( 23 ) being configured to adjust a relative distance between the furnace hood ( 20 ) and the electrode carriage ( 30 ).

13. The melting furnace ( 1 ) according to claim 12 ,
wherein the melting crucible ( 10 ) is attached via a furnace platform ( 11 ) to a platform carriage ( 12 ), the platform carriage ( 12 ) being held on and movably guided by the furnace column ( 62 ).

14. The melting furnace ( 1 ) according to claim 13 ,
wherein the platform carriage ( 12 ) is movable by a platform spindle drive ( 14 ),
wherein the platform spindle drive ( 14 ) is fixed to the platform carriage ( 12 ) and has one or more motor-driven spindle nuts that interact with a platform spindle ( 15 ) that runs substantially parallel to the furnace column ( 62 ).

15. The melting furnace ( 1 ) according to claim 13 , further comprising at least one weighing cell which is installed on the platform carriage ( 12 ).

16. The melting furnace ( 1 ) according to claim 12 , further comprising one or more weighing cells for weighing a weight of the consumable electrode ( 41 ) and/or the melting crucible ( 10 ).

17. The melting furnace ( 1 ) according to claim 16 , wherein at least one of the one or more weighing cells is installed below a base plate of the melting crucible ( 10 ).

18. The melting furnace ( 1 ) according to claim 16 , wherein at least one of the one or more weighing cells is installed on the electrode carriage ( 30 ).

Assignees

• Sms Group Gmbh

Inventors

• Demirci Cihangir
• El-Rabati Ros
• Robinson David

Classifications

• H05B7/10

  Mountings, supports, terminals or arrangements for feeding or guiding electrodes · CPC title

• B22D23/10 Primary

  Electroslag casting {(electroslag remelting C22B9/18)} · CPC title

• H01R39/646

  through an electrical conductive fluid · CPC title

• F27B3/085 Primary

  Arc furnaces · CPC title

• F27D11/10

  Disposition of electrodes · CPC title