US1217306A - Electric-furnace-wall construction. - Google Patents

Electric-furnace-wall construction. Download PDF

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Publication number
US1217306A
US1217306A US52863A US5286315A US1217306A US 1217306 A US1217306 A US 1217306A US 52863 A US52863 A US 52863A US 5286315 A US5286315 A US 5286315A US 1217306 A US1217306 A US 1217306A
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United States
Prior art keywords
furnace
slag
electric
wall construction
water
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Expired - Lifetime
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US52863A
Inventor
Ingenuin Hechenbleikner
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.)
SOUTHERN ELECTRO-CHEMICAL Co
SOUTHERN ELECTRO CHEMICAL Co
Original Assignee
SOUTHERN ELECTRO CHEMICAL Co
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Filing date
Publication date
Priority claimed from US86983014A external-priority patent/US1173960A/en
Application filed by SOUTHERN ELECTRO CHEMICAL Co filed Critical SOUTHERN ELECTRO CHEMICAL Co
Priority to US52863A priority Critical patent/US1217306A/en
Application granted granted Critical
Publication of US1217306A publication Critical patent/US1217306A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/62—Heating elements specially adapted for furnaces
    • H05B3/64—Heating elements specially adapted for furnaces using ribbon, rod, or wire heater

Definitions

  • This invention relates l,to improvements in electric furnace wall construction and is especially designed for luse in connection with the treatment of phosphate rock to eX- pel phosphoric acid, and the objects of the invention are to overcome the peculiar diliculties present by the extremely high temperature of the slag formed in this process, and it consists essentially of the improved construction hereinafter described in detail in the accompanying specification and drawing.
  • the drawing shows a vertical section through an embodiment of the invention.
  • the electric furnace itself may, in the present invention, be said to consist of three parts comprising the bottom section A, the tapered stack section B and the outlet elbow C. These parts are detachably connected and fit together, the detachable convnection between the bottom portion and tapered stack section being effected by abut.
  • the bottom section A is water-cooled and is, in fact, practically in the form ofa water jacket, being formed with inner and outer walls 14. and 15 of thin sheet metal separated and connected together by I-beams 16 or the like and having means for circulating water in the interior and distributing the same equally therethrough.
  • annular outlet channel 17 is formed around the top on the exterior into .which ⁇ equally -distributed overflow pipes 18 are ,arranged to discharge, such overflow pipes extending in a radial direction from the interior of the water acket. t
  • the inflowing water is adapted to.- pass through a conduit 19 which opensv at the topy of the water acket.
  • the furnace is originally constructed without any lining in the bottom section whatever.
  • the water jacket, however',l being considerably cooler than the slag-formed within the, furnace will cause a portion of the slag to freeze tothe inner wall of the water'jacket to thereby form a liningD of frozen slag.
  • the body portion rests on suitable transverse'bearings 2O conveniently formed of wood or like' insulating material.
  • a slag overflow E is provided which is kept open during the operation and which is so arranged that the molten slag seals ⁇ the furnace.
  • Suitable manholes 25 arfI also formed around the body portion having' water cooled doors 26, the inner sides of the water cooled doors being covered with a layer of frozenI slag.
  • the tapered section B of the furnace is not water cooled and is adpated to carry the electrodes-F which extend in an inclined direction through it.
  • the electrodes and the holders and means vfor adjusting the electrodes do not form part of the present invention and are disz pelled lfrom the furnace gases will be suitably oxidized and caught b v suitable abs0rption towers, such for example as those shown in my United States Patent Number 1,112,211, granted on September 29th-1914.
  • the walls of the body portion will be effectively 4protected from the action of the slag and phosphoric acid by the layer of molten Slag which will form on it.
  • An electric furnace comprising a water cooled body, a non-water cooled tapered portion connected to the body portion, a non-water cooled elbow section connected to the tapered portion, and a lining of chilledslag,- of substantially uniform thickness for. both the water cooled and nonwater cooled parts.
  • An electric furnace comprising a water cooled body portion, a lining of chilled slag extending ⁇ completely around the sides and over the bottom of the body portion, a tapered portion fitting on the body portion, a detachable connection between the tapered portion 'and body portion formed by channel steel sections bolted together, and an elbow section connected to the tapered section, a pair of channel steel sections forming the connection between the tapered section and the elbow section.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

UNITED STATES PATENT OFFICE.
ING-ENUIN I-IECI-IENIBLEIKNER, OF CHARLOTTE, NORTH CAROLINA, ASSIGNOR TO SOUTHERN ELECTRO-CHEMICAL COMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW JERSEY.
ELECTRIC-FURNACE-WALL CONSTRUCTION.
Specification of Letters Patent.V 'Patented Feb, 27, 191 '7.
Original application led November 2, 1914,-Serial No. 869,8301 Divided and this application filed September 27,1915. ser'ia1No.52,sca. l
To allwkom t may concern Be it known that I, INGENUIN HEGHEN- BLEIKNER, a subject of the Emperor of Austria-Hungary,and resident of Charlotte, in the State of North Carolina, United States of America,'haveinvented certain new and useful Improvements in Electric-Furnace- Wall Construction, lof which the following is the specification. i This invention relates l,to improvements in electric furnace wall construction and is especially designed for luse in connection with the treatment of phosphate rock to eX- pel phosphoric acid, and the objects of the invention are to overcome the peculiar diliculties present by the extremely high temperature of the slag formed in this process, and it consists essentially of the improved construction hereinafter described in detail in the accompanying specification and drawing.
The drawing shows a vertical section through an embodiment of the invention.
The details of the electrodes and other features of the furnace constructed apart from the walls thereof are shown in my application Serial No. 869,830, filed November 2nd, 1914, of which this is a division.
The electric furnace itself may, in the present invention, be said to consist of three parts comprising the bottom section A, the tapered stack section B and the outlet elbow C. These parts are detachably connected and fit together, the detachable convnection between the bottom portion and tapered stack section being effected by abut.
ting channel sections 10 and 11 which are bolted or otherwise clamped together while the detachable .connection between the taypered stack section and the elbow section is effected by similar channel steel sections 12 and 13 which are similarly connected together. l
The bottom section A is water-cooled and is, in fact, practically in the form ofa water jacket, being formed with inner and outer walls 14. and 15 of thin sheet metal separated and connected together by I-beams 16 or the like and having means for circulating water in the interior and distributing the same equally therethrough.
To eect an even distribution of water an annular outlet channel 17 is formed around the top on the exterior into .which `equally -distributed overflow pipes 18 are ,arranged to discharge, such overflow pipes extending in a radial direction from the interior of the water acket. t
The inflowing water is adapted to.- pass through a conduit 19 which opensv at the topy of the water acket. The furnace is originally constructed without any lining in the bottom section whatever. The water jacket, however',l being considerably cooler than the slag-formed within the, furnace will cause a portion of the slag to freeze tothe inner wall of the water'jacket to thereby form a liningD of frozen slag. s
It is found that a lining of this character is .the only one which will resist the action of the calcium lsilicate slag; It is impracticable to use any form of fire-brick or other lining generally used in electric furnaces, owing to the fact that such lining will be readily attacked by the phosphoric' acid and calcium. silicateslag.
The body portion rests on suitable transverse'bearings 2O conveniently formed of wood or like' insulating material. Onv one side ofthe body portion a slag overflow E is provided which is kept open during the operation and which is so arranged that the molten slag seals `the furnace.
Suitable manholes 25 arfI also formed around the body portion having' water cooled doors 26, the inner sides of the water cooled doors being covered with a layer of frozenI slag.
The tapered section B of the furnace is not water cooled and is adpated to carry the electrodes-F which extend in an inclined direction through it.
The electrodes and the holders and means vfor adjusting the electrodes do not form part of the present invention and are disz pelled lfrom the furnace gases will be suitably oxidized and caught b v suitable abs0rption towers, such for example as those shown in my United States Patent Number 1,112,211, granted on September 29th-1914.
The walls of the body portion will be effectively 4protected from the action of the slag and phosphoric acid by the layer of molten Slag which will form on it.
In the process as above described a comparatively high voltage (say in the neighborhood of 300 volts) is necessary for a successful operation, and experiments made have proved that it is impossible to use any type of well known furnace lining with a voltage as high as this and with a slag having the high temperature of the calcium silicate slag produced in the process. Itis found, however, that the water cooled furnace walls chill the slag to form an effective protective coating as above described.
What I claim as my invention is:
1. An electric furnace comprising a water cooled body, a non-water cooled tapered portion connected to the body portion, a non-water cooled elbow section connected to the tapered portion, and a lining of chilledslag,- of substantially uniform thickness for. both the water cooled and nonwater cooled parts. f l
2. An electric furnace comprising a water cooled body portion, a lining of chilled slag extending` completely around the sides and over the bottom of the body portion, a tapered portion fitting on the body portion, a detachable connection between the tapered portion 'and body portion formed by channel steel sections bolted together, and an elbow section connected to the tapered section, a pair of channel steel sections forming the connection between the tapered section and the elbow section.
In witness whereof I have hereunto set my hand in the presence of two witnesses,
INGENUIN HECIIENBLEIKNER. Witnesses:
D. C. CARMIGHAEL,
A.. M. HWEBB.
US52863A 1914-11-02 1915-09-27 Electric-furnace-wall construction. Expired - Lifetime US1217306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US52863A US1217306A (en) 1914-11-02 1915-09-27 Electric-furnace-wall construction.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86983014A US1173960A (en) 1914-11-02 1914-11-02 Electric furnace.
US52863A US1217306A (en) 1914-11-02 1915-09-27 Electric-furnace-wall construction.

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US1217306A true US1217306A (en) 1917-02-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375449A (en) * 1979-05-23 1983-03-01 Sidchrome (S.E. Asia) Limited Electric furnaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375449A (en) * 1979-05-23 1983-03-01 Sidchrome (S.E. Asia) Limited Electric furnaces

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