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US1561731A - Electric-arc furnace - Google Patents

Electric-arc furnace Download PDF

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Publication number
US1561731A
US1561731A US758863A US75886324A US1561731A US 1561731 A US1561731 A US 1561731A US 758863 A US758863 A US 758863A US 75886324 A US75886324 A US 75886324A US 1561731 A US1561731 A US 1561731A
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US
United States
Prior art keywords
furnace
sleeve
wall
electric
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US758863A
Inventor
Kostka Fritz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RHEINISCHE METALL WAAREN und M
RHEINISCHE METALL-WAAREN-UND MASCHINENFABRIK
Original Assignee
RHEINISCHE METALL WAAREN und M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RHEINISCHE METALL WAAREN und M filed Critical RHEINISCHE METALL WAAREN und M
Priority to US758863A priority Critical patent/US1561731A/en
Application granted granted Critical
Publication of US1561731A publication Critical patent/US1561731A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes

Definitions

  • the electrodes passing through the furnace Wall are surrounded by a tube of electrically non-conducting material which is carried by a metal sleeve connected to the metal jacket of the furnace. Even if the holes in the fire-proof furnace vWall for the reception of the packing for the electrodes are made with the utmost care cracks are easily formed in said wall. During the smelting of metals which easily convert into vapor, or-alloys containing such metals, the vapors escape through thel cracks, and thereby condense at the outer surface and cause short-circuits by bridging over Athe metallic-parts which necessarily must be insulated.
  • the purpose of this invention is to eliminate this drawback by providing a sleeve around the tube surrounding the electrode consisting also of non-conducting material in which one end is ein/bedded in the fireproof furnace wall and the other end holds the metallic part of the packing for the electrodes at a distance separated from the furnace jacket that short-circuiting is absolutely prevented.
  • the drawing shows one'mode of carrying out the invention and shows a side view partly in section.
  • the tire-proof furnace wall B is surrounded by an insulating layer and at the outer surface by a metallic jacket.
  • the end of the 0 electrode lying in the furnace wall is sur-4 rounded by a tube E of non-conducting material which is carried by a metal sleeve D.
  • the sleeve D is insulated at G. from and screwed into the furnace wall A.
  • the tube E is surrounded by a sleeve H which alsoconi sists of a material which is a non-conductor of electricity.
  • One end of said sleeve is embedded in the reroof wall. or in the in- 5 sulating layer of the v rnaoe while the other ⁇ vend abuts against the metal sleeve D and holds it separated from the furnace mantle A in such a manner as to absolutely prevent short circuits.
  • a short circuit preventing device for the electrodes of electric arc furnaces comprising an insulating sleeve having one end embedded in the furnace wall and the other end extending beyond the outside wall of the furnace; and a tube mounted in said sleeve adapted to have the electrode mounted therein and projected therethrough whereby short circuits from-the electrode to the Walls of the furnace are prevented by means of said sleeve.
  • a short circuit preventing device for the electrodes of electric arc furnaces comprising an insulating sleeve having one end embedded in the furnace Wall and the other end extending beyond the outside Wall of the furnace; a tube mounted in said sleeve; and a metal sleeve on said tube abutting against said insulating sleeve and adapted to have the electrode ⁇ mounted thereon and projected therethrough whereby short cir' cuits from the electrode to the walls of the vfurnace are prevented by means of said firstnamed sleeve.
  • a short circuit preventing device for the electrodes of electric arc furnaces com prisin an insulating sleeve mounted in the wall o the furnace and adapted to space thc metallic -part of the packing' for the 'electrode a dlstance from the outside wall of the furnace.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Nav. 17, 1925. "1561,731
F. KOSTKA ELECTRIC ARC FURNACE Filed Dec. 30,' 1924 Patented Nov. 17,1925.
' UNITED STATES PariazNTl OFFICE.
:FRITZ KOSTKA; OF DUSSELDORF, GERMANY, ASSIGNOR T RHEINISCHE METALL- 'WAABEN-UND MASCHINENFABRIK, OF DUSSELDORF-DERENDORF, GERMANY.
ELECTRIC-Anc rURNAcn Application led December 30, 1924. Serial No. 758,863.
To all whom t may concern.' j
Be it known that I, FRITZ KosrKA, a citi- Yzen of Czechoslovakia, residing at Dusseldorf, Germany, Karlstrasse 98, 4have invent- 5 ed certain new and useful Improvements 1n or Relating to Electric-Arc Furnaces, of which the following is -a specification.
In electric arc furnaces the electrodes passing through the furnace Wall are surrounded by a tube of electrically non-conducting material which is carried by a metal sleeve connected to the metal jacket of the furnace. Even if the holes in the fire-proof furnace vWall for the reception of the packing for the electrodes are made with the utmost care cracks are easily formed in said wall. During the smelting of metals which easily convert into vapor, or-alloys containing such metals, the vapors escape through thel cracks, and thereby condense at the outer surface and cause short-circuits by bridging over Athe metallic-parts which necessarily must be insulated.
The purpose of this invention is to eliminate this drawback by providing a sleeve around the tube surrounding the electrode consisting also of non-conducting material in which one end is ein/bedded in the fireproof furnace wall and the other end holds the metallic part of the packing for the electrodes at a distance separated from the furnace jacket that short-circuiting is absolutely prevented.
The drawing shows one'mode of carrying out the invention and shows a side view partly in section.
'The tire-proof furnace wall B is surrounded by an insulating layer and at the outer surface by a metallic jacket. The end of the 0 electrode lying in the furnace wall is sur-4 rounded by a tube E of non-conducting material which is carried by a metal sleeve D. The sleeve D is insulated at G. from and screwed into the furnace wall A. At the exit point from the furnace the tube E is surrounded by a sleeve H which alsoconi sists of a material which is a non-conductor of electricity. One end of said sleeve is embedded in the reroof wall. or in the in- 5 sulating layer of the v rnaoe while the other` vend abuts against the metal sleeve D and holds it separated from the furnace mantle A in such a manner as to absolutely prevent short circuits.
I claim:
1. In electric arc furnaces for melting metals the combination ofv an electrode with a tube surrounding the part of the electrode lying in the furnace wall and a sleeve of non-conducting material surrounding the tube, one end of the` sleeve being embedded in the fire-proof furnace wall While the othei1 end holds the metallic part of the acking for the electrode at such a distance rom the wall of the furnace that short-circuiting is prevented.
2. A short circuit preventing device for the electrodes of electric arc furnaces comprising an insulating sleeve having one end embedded in the furnace wall and the other end extending beyond the outside wall of the furnace; and a tube mounted in said sleeve adapted to have the electrode mounted therein and projected therethrough whereby short circuits from-the electrode to the Walls of the furnace are prevented by means of said sleeve. I
3. A short circuit preventing device for the electrodes of electric arc furnaces comprising an insulating sleeve having one end embedded in the furnace Wall and the other end extending beyond the outside Wall of the furnace; a tube mounted in said sleeve; and a metal sleeve on said tube abutting against said insulating sleeve and adapted to have the electrode `mounted thereon and projected therethrough whereby short cir' cuits from the electrode to the walls of the vfurnace are prevented by means of said firstnamed sleeve.
4. A short circuit preventing device for the electrodes of electric arc furnaces com prisin an insulating sleeve mounted in the wall o the furnace and adapted to space thc metallic -part of the packing' for the 'electrode a dlstance from the outside wall of the furnace. j. v
In testimony whereof I have aflixed my signature.
FRITZ KOSTKA.`
US758863A 1924-12-30 1924-12-30 Electric-arc furnace Expired - Lifetime US1561731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US758863A US1561731A (en) 1924-12-30 1924-12-30 Electric-arc furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US758863A US1561731A (en) 1924-12-30 1924-12-30 Electric-arc furnace

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US1561731A true US1561731A (en) 1925-11-17

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US758863A Expired - Lifetime US1561731A (en) 1924-12-30 1924-12-30 Electric-arc furnace

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571202A1 (en) * 1984-10-01 1986-04-04 Usinor ELECTRODE STRUCTURE FOR MOLTEN METAL BATH

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571202A1 (en) * 1984-10-01 1986-04-04 Usinor ELECTRODE STRUCTURE FOR MOLTEN METAL BATH
EP0178981A1 (en) * 1984-10-01 1986-04-23 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Electrode structure for a molten metal bath
US4697273A (en) * 1984-10-01 1987-09-29 Union Siderurgique Du Nord Et De L'est De La France (Usinor) Electrode structure for a bath of molten metal

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