US3672650A - Furnaces - Google Patents

Furnaces Download PDF

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Publication number
US3672650A
US3672650A US46742A US3672650DA US3672650A US 3672650 A US3672650 A US 3672650A US 46742 A US46742 A US 46742A US 3672650D A US3672650D A US 3672650DA US 3672650 A US3672650 A US 3672650A
Authority
US
United States
Prior art keywords
chute
feed
furnace
section
wall
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
US46742A
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English (en)
Inventor
Neil Clifford Ashdown
Eugene Reginald Groutsch
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.)
Electrolytic Zinc Company of Australasia Ltd
Original Assignee
Electrolytic Zinc Company of Australasia Ltd
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 Electrolytic Zinc Company of Australasia Ltd filed Critical Electrolytic Zinc Company of Australasia Ltd
Application granted granted Critical
Publication of US3672650A publication Critical patent/US3672650A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • F27D2003/105—Charging directly from hoppers or shoots using shutters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S266/00—Metallurgical apparatus
    • Y10S266/90—Metal melting furnaces, e.g. cupola type

Definitions

  • feed chutes for charging the metal to the bath of the furnace.
  • feed chutes normally consist of a length of metal ducting of rectangular cross-section which passes through the shell of the furnace to a position some distance above the level of molten metal in the furnace. The chutes are sometimes flared at the lower end.
  • a column of feed material is normally maintained in the feed chute so that metal is continuously charged to the bath of the furnace. The base of the column of sheet metal feed material rests on the floor of the furnace, and, as the lower sheets melt, the column of sheet metal feed material descends into the furnace.
  • a feed chute suitable for charging a metal-melting fumace characterized in that said chute includes a member which is movable to vary the effective cross-section of the chute, the movement of said member being governed by control means so as to enable the rate of passage of feed material through the chute to be controlled.
  • the said movable member may suitably comprise a hinged lower section of one of the walls of the chute, arranged such that the hinged section moves freely between the two adjacent walls so as to vary the effective cross-section of the chute and thereby control the rate of entry of the feed material into the furnace.
  • the two walls of the chute adjacent to the movable member may also be flared to allow the movable wall section or flap, an appropriate degree of outward movement while maintaining the enclosure provided by the chute.
  • a suitable amount of flare may be 4 to 6.
  • the movement of the hinged flap may suitably be governed by control means comprising an air ram or similar device with associated control equipment, the said control means being situated essentially outside the furnace shell.
  • control means comprising an air ram or similar device with associated control equipment, the said control means being situated essentially outside the furnace shell.
  • the push rod of the ram passes through an opening in the furnace wall and is connected to the hinged flap by a clevis pin and hook or similar arrangement to permit easy removal of all parts from outside the furnace.
  • the air ram or similar device should be capable of being operated such as to allow rapid application and release of pressure to the column of feed material so as to closely control its descent through the chute.
  • the feed chute and its attachments may be fabricated from materials well known to those skilled in the art.
  • FIG. 1 is a sectional elevation of a feed chute in accordance with the invention installed in a conventional furnace
  • FIG. IA is a cross-section A-A ofFlG. 1,
  • FIG. 2 is a diagrammatic drawing showing a means of controlling the air ram.
  • a conventional electric induction metal-melting furnace l of the type normally employed in the zinc industry is provided with a feed chute 2 shown containing a zinc sheet feed, the said feed chute being of substantially conventional dimensions, but being provided at its lower end with a hinged flap 3.
  • the said flap 3 is hinged at a point outside the furnace and is capable of being opened and closed by means of a push rod 4 attached to the flap by a clevis pin and hook device 5.
  • the walls of the chute adjacent to the flap are flared to an angle of about 5 to allow the flap a suitable degree of outward movement to enlarge the effective cross-section of the chute.
  • the push rod 4 passes through an opening in the wall of the furnace and is connected to a double-acting air cylinder 6.
  • the air supply to the double-acting air cylinder 6 is provided via a double-acting solenoid valve 7.
  • the solenoid valve 7 delivers air to one or other side of the piston of the cylinder 6, depending on the operation of the control switch 8, such that the hinged flap 3 is made to open or close.
  • the control switch 8 is spring-loaded so that in its normal position it causes the hinged flap to close.
  • An isolating switch 9 de-energizes the solenoid valve 7 and renders the springloaded control switch 8 inoperative.
  • the hinged flap remains in the open or closed position depending on its position prior to opening the isolating switch 9. The extent of opening of the flap 3 is determined by the adjustment of the capstan nut 10.
  • the hinged flap Whenever there is an interruption to the withdrawal of molten metal from the furnace the hinged flap is closed simply by closing the isolating switch 9.
  • the push rod is thrust into the furnace, closing the hinged flap and thereby arresting the entry of feed material into the furnace.
  • a wedge may be inserted behind the push rod as a safety measure in the event of a failure of the air supply.
  • the operation is continually repeated until the bottom of the column of zinc sheet feed contained in the chute is safely resting on the floor of the furnace.
  • a chute for the controlled feeding of loose metal sheets to a melting furnace comprising a substantially vertical feed chute of rectangular cross-section extending with its lower end into the melting furnace and including a movable member, said movable member comprising a lower section of one wall of the chute pivoted by its top edge to the feed chute so as to allow the said movable member to pivot into and out of the feed chute so as to vary the effective cross-section of the chute and to clamp the column of sheet metal feed against the op posite wall of the chute, said movable member being of substantially greater length than the width of the feed chute and said movable member being provided with control means for alternately and momentarily clamping and releasing the sheet metal feed material contained in the chute, thereby momentarily arresting and freeing the downward travel of the column of loose metal sheets and providing a means for controlling the rate of feed of the metal sheets into the furnace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Chutes (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US46742A 1969-06-19 1970-06-16 Furnaces Expired - Lifetime US3672650A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU5666769 1969-06-19

Publications (1)

Publication Number Publication Date
US3672650A true US3672650A (en) 1972-06-27

Family

ID=3742222

Family Applications (1)

Application Number Title Priority Date Filing Date
US46742A Expired - Lifetime US3672650A (en) 1969-06-19 1970-06-16 Furnaces

Country Status (13)

Country Link
US (1) US3672650A (enrdf_load_stackoverflow)
JP (1) JPS4815122B1 (enrdf_load_stackoverflow)
BE (1) BE751904A (enrdf_load_stackoverflow)
DE (1) DE2029606B2 (enrdf_load_stackoverflow)
ES (1) ES381847A1 (enrdf_load_stackoverflow)
FR (1) FR2052643A5 (enrdf_load_stackoverflow)
GB (1) GB1247509A (enrdf_load_stackoverflow)
IE (1) IE34310B1 (enrdf_load_stackoverflow)
NL (1) NL7008922A (enrdf_load_stackoverflow)
NO (1) NO127431B (enrdf_load_stackoverflow)
PL (1) PL80722B1 (enrdf_load_stackoverflow)
ZA (1) ZA704177B (enrdf_load_stackoverflow)
ZM (1) ZM7770A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067463A (en) * 1975-01-13 1978-01-10 Asea Aktiebolag Apparatus for charging metal plates edgewise into a metal melt
CN100574858C (zh) * 2003-07-04 2009-12-30 奥地利钢铁联合企业阿尔帕工业设备制造有限及两合公司 用于装填松散材料的方法及实施这种方法的装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO138462C (no) * 1974-12-19 1980-04-23 Elkem Spigerverket As Anordning ved beskikning av elektriske smelteovner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072392A (en) * 1932-03-12 1937-03-02 Wests Gas Improvement Co Ltd Vertical retort for the carbonization of coal and the like
US2343337A (en) * 1941-01-11 1944-03-07 Budd Wheel Co Apparatus for melting metal
US2829184A (en) * 1954-08-13 1958-04-01 Khek Massimiliano Low frequency induction furnace for melting non-ferrous metals
US2962174A (en) * 1958-12-24 1960-11-29 Harold F Shekels Apparatus for charging open hearth furnaces
US3266644A (en) * 1964-11-19 1966-08-16 The Illinois National Bank Co Conditioning apparatus with tiltable receiving platform
US3344939A (en) * 1965-09-03 1967-10-03 United States Steel Corp Scrap charging box
US3425676A (en) * 1965-09-30 1969-02-04 United States Steel Corp Molten metal producing furnace

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072392A (en) * 1932-03-12 1937-03-02 Wests Gas Improvement Co Ltd Vertical retort for the carbonization of coal and the like
US2343337A (en) * 1941-01-11 1944-03-07 Budd Wheel Co Apparatus for melting metal
US2829184A (en) * 1954-08-13 1958-04-01 Khek Massimiliano Low frequency induction furnace for melting non-ferrous metals
US2962174A (en) * 1958-12-24 1960-11-29 Harold F Shekels Apparatus for charging open hearth furnaces
US3266644A (en) * 1964-11-19 1966-08-16 The Illinois National Bank Co Conditioning apparatus with tiltable receiving platform
US3344939A (en) * 1965-09-03 1967-10-03 United States Steel Corp Scrap charging box
US3425676A (en) * 1965-09-30 1969-02-04 United States Steel Corp Molten metal producing furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067463A (en) * 1975-01-13 1978-01-10 Asea Aktiebolag Apparatus for charging metal plates edgewise into a metal melt
CN100574858C (zh) * 2003-07-04 2009-12-30 奥地利钢铁联合企业阿尔帕工业设备制造有限及两合公司 用于装填松散材料的方法及实施这种方法的装置

Also Published As

Publication number Publication date
JPS4815122B1 (enrdf_load_stackoverflow) 1973-05-12
IE34310B1 (en) 1975-04-02
ZA704177B (en) 1971-03-31
PL80722B1 (enrdf_load_stackoverflow) 1975-08-30
DE2029606B2 (de) 1972-04-13
IE34310L (en) 1970-12-19
DE2029606A1 (de) 1971-06-24
GB1247509A (en) 1971-09-22
FR2052643A5 (enrdf_load_stackoverflow) 1971-04-09
ES381847A1 (es) 1972-11-16
BE751904A (fr) 1970-11-16
ZM7770A1 (en) 1971-03-22
NO127431B (enrdf_load_stackoverflow) 1973-06-18
NL7008922A (enrdf_load_stackoverflow) 1970-12-22

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