Tapping device and method using induction heat for melt

Patent metadata

Field	Value
Publication number	US-9538584-B2
Application number	US-201314143495-A
Country	US
Kind code	B2
Filing date	Dec 30, 2013
Priority date	Oct 4, 2013
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A tapping device and method using induction heat for melt comprises melting furnace made of steel; heating unit disposed in the upper part in the melting furnace and made of graphite material; induction coil wound around the heating unit; insulator disposed adjacent to the bottom surface of the lower part of the melting furnace; supporter disposed outside the insulator; and firebricks disposed on the bottom surface of melting furnace and outside the supporter.

First claim

What is claimed is:

1. A tapping device for melt using induction heat, comprising:
a melting furnace( 10 ) made of steel material;
firebricks( 20 ) disposed on a bottom surface of the melting furnace( 10 ), the firebricks( 20 ) including a lower surface in contact with the bottom surface of the melting furnace( 10 ) and an upper surface opposite to the lower surface;
a heating unit( 12 ) disposed in the melting furnace( 10 ) and made of graphite material, wherein an upper end of the heating unit( 12 ) is disposed above a level at which the upper surface of the firebricks( 20 ) is disposed;
an induction coil( 14 ) wound around the heating unit( 12 );
an insulator( 16 ) disposed adjacent to the bottom surface of the melting furnace( 10 ); and
a supporter( 18 ) disposed outside the insulator( 16 ), wherein the firebricks( 20 ) are disposed outside the supporter( 18 ), wherein the firebricks( 20 ) include two opposite side surfaces which are apart from each other by a gap; and the induction coil( 14 ) is disposed in the gap to face the two opposite side surfaces.

2. The tapping device of claim 1 , wherein the surface of the heating unit( 12 ) is coated with molybdenum(MoSi 2 ).

3. The tapping device of claim 2 , wherein coolant flow channel( 24 ) is formed to make coolant flow under insulator( 16 ) for temperature control of the heating unit( 12 ) and cooling down while tapping is halted.

4. The tapping device of claim 1 , wherein the surface of the heating unit( 12 ) is coated with silicon carbide(SiC).

5. The tapping device of claim 4 , wherein coolant flow channel( 24 ) is formed to make coolant flow under insulator( 16 ) for temperature control of the heating unit( 12 ) and cooling down while tapping is halted.

6. The tapping device of claim 1 , wherein melt tapping hole( 22 ) is formed in the upper part of induction coil( 14 ) and firebricks( 20 ), and the melt tapping hole( 22 ) is made of alumina refractories.

7. The tapping device of claim 1 , wherein the insulator( 16 ) is formed of core of ferrite material.

8. The tapping device of claim 1 , wherein coolant flow channel( 24 ) is formed to make coolant flow under insulator( 16 ) for temperature control of the heating unit( 12 ) and cooling down while tapping is halted.

9. A tapping method for melt using induction heat, wherein the method comprises steps of melting solidified melt inside a melt tapping hole( 22 ) and discharging the melt downwards by gravity using a tapping device(A), wherein the tapping device(A) comprises:
a melting furnace( 10 ) made of steel material;
firebricks( 20 ) disposed on a bottom surface of the melting furnace( 10 ), the firebricks( 20 ) including a lower surface in contact with the bottom surface of the melting furnace( 10 ) and an upper surface opposite to the lower surface;
a heating unit( 12 ) disposed in the melting furnace( 10 ) and made of graphite material, wherein an upper end of the heating unit( 12 ) is disposed above a level at which the upper surface of the firebricks( 20 ) is disposed;
an induction coil( 14 ) wound around the heating unit( 12 );
an insulator( 16 ) disposed adjacent to the bottom surface of the melting furnace( 10 ); and
a supporter( 18 ) disposed outside the insulator( 16 ), wherein the firebricks( 20 ) are disposed outside the supporter( 18 ), wherein the firebricks( 20 ) include two opposite side surfaces which are apart from each other by a gap; and the induction coil( 14 ) is disposed in the gap to face the two opposite side surfaces.

10. The tapping method of claim 9 , wherein the surface of the heating unit( 12 ) is coated with molybdenum(MoSi 2 ).

11. The tapping method of claim 10 , wherein coolant flow channel( 24 ) is formed to make coolant flow under insulator( 16 ) for temperature control of the heating unit( 12 ) and cooling down while tapping is halted.

12. The tapping method of claim 9 , wherein the surface of the heating unit( 12 ) is coated with silicon carbide(SiC).

13. The tapping method of claim 12 , wherein coolant flow channel( 24 ) is formed to make coolant flow under insulator( 16 ) for temperature control of the heating unit( 12 ) and cooling down while tapping is halted.

14. The tapping method of claim 9 , wherein melt tapping hole( 22 ) is formed in the upper part of induction coil( 14 ) and firebricks( 20 ), and the melt tapping hole( 22 ) is made of alumina refractories.

15. The tapping method of claim 9 , wherein the insulator( 16 ) is formed of core of ferrite material.

16. The tapping method of claim 9 , wherein coolant flow channel( 24 ) is formed to make coolant flow under insulator( 16 ) for temperature control of the heating unit( 12 ) and cooling down while tapping is halted.

Assignees

• Korea Hydro & Nuclear Power Co

Inventors

• Cho Hyun Je
• Kim Cheon Woo
• Kim Young Il
• Lee Sang Woo
• Park Seung Chul
• Park Jong Gil
• Hwang Tae Won

Classifications

• F27D3/1509

  Tapping equipment · CPC title

• F27B3/19

  Arrangements of devices for discharging · CPC title

• H05B6/24 Primary

  Crucible furnaces (H05B6/30 takes precedence) · CPC title

• H05B6/34

  Arrangements for circulation of melts · CPC title

• F27B3/28

  Arrangement of controlling, monitoring, alarm or the like devices · CPC title