US3233757A - Shaft furnace charger - Google Patents

Shaft furnace charger Download PDF

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Publication number
US3233757A
US3233757A US390865A US39086564A US3233757A US 3233757 A US3233757 A US 3233757A US 390865 A US390865 A US 390865A US 39086564 A US39086564 A US 39086564A US 3233757 A US3233757 A US 3233757A
Authority
US
United States
Prior art keywords
pair
plates
hopper
gate
seal
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
US390865A
Other languages
English (en)
Inventor
Joseph C Long
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.)
Elkem Metals Co LP
Original Assignee
Union Carbide Corp
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
Priority to BE788477D priority Critical patent/BE788477Q/fr
Application filed by Union Carbide Corp filed Critical Union Carbide Corp
Priority to US390865A priority patent/US3233757A/en
Priority to DEU11865A priority patent/DE1295756B/de
Priority to GB30526/65A priority patent/GB1120278A/en
Priority to NL656510753A priority patent/NL141244B/xx
Application granted granted Critical
Publication of US3233757A publication Critical patent/US3233757A/en
Assigned to ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSHIP reassignment ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSHIP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNION CARBIDE CORPORATION, A NY CORP.
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/54—Gates or closures
    • B65D90/58—Gates or closures having closure members sliding in the plane of the opening
    • B65D90/582—Gates or closures having closure members sliding in the plane of the opening having a rotational motion
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2590/00—Component parts, details or accessories for large containers
    • B65D2590/54—Gates or closures
    • B65D2590/547—Gates or closures in multiple arrangement

Definitions

  • This invention relates to a charger for use with a kiln or furnace and it refers more particularly to a charging gate system for use with a shaft furnace operating under sub-atmospheric top pressure. It is the general procedure in the operation of shaft furnaces to provide the top of the furnace with a double or even triple vertical series of chambers separated from each other by conical valves which are independently operated. When operating these valves in a desired se quence, solid materials can be passed through the chambers and into the furnace without a significant loss of gas pressure Within the furnace. Since such furnaces are generally operated at greater than atmospheric pressures and since the exhaust gases are invariably recovered, the conical valves are designed to withstand any gas pressure against the underside of the cone. This pressure or force is thus in a direction which tends to close and seat the cones.
  • a further disadvantage of the cone-type closure is that the solid charge material slides over and abrades away the seating surfaces thus making it difiicult to maintain a gastight seal.
  • apparatus comprising a cylindrical segment plate supported by two or more sector plates, the assembly being rotatable around a horizontal axis, the cylindrical segment plate sliding over an open-ended conduit, the transverse end section of which conforms to the cylindrical form of the segment plate; hopper means of smaller cross-sectional area at its exit than the conduit disposed so as to introduce charge material into the conduit without contact with the end or the walls thereof; and means to rotate the cylindrical sector assembly around its axis.
  • FIGURE 1 is a vertical elevational view through a shaft furnace (partially shown in section) provided with two chargers or gate assemblies of the invention taken transverse to the axis of rotation of the gate assemblies;
  • FIGURE 2 is an enlarged sectional view through one of the gate assemblies in FIG. 1, and
  • FIGURE 3 is a vertical sectional view taken along line 33 of FIGURE 2.
  • a gate assembly including two segment plates 12 and 14 which are rotatably supported by a pair of suitable bearings 16 and 18 on each end of shaft 20. As best shown in FIG. 2, the lower ends of the segment plates 12 and 14 are rigidly connected together by a cylindrical sector gate plate 22 which controls the flow of charge material from hopper 24.
  • a cylindrical sector seal plate 26 and its supporting side rib plates 28 and 30 are loosely fastened to the segment plates 12 and 14 so as to move rotatably with the gate assembly 10 and to allow a small degree of movement in a radial direction.
  • the gate assembly 10 and the seal plate and its supporting rib plates 28 and 30 as well as the lower portion of the hopper 24 are enclosed within a suitable gas tight housing 32.
  • bars 34 and 36 secured to the cylindrical wall of the housing 32 form the stationary sealing members upon which the seal plate 26 seats and slides.
  • the upper end of a connecting conduit 38 coincides in contour with the upper surface of the bars 34 and 36, and when the gate assembly 10 is in the closed position it is directly contacted and sealed by the seal plate 26.
  • the housing 32 may be suitably equipped with capped inspection ports 40 and 42 and a pressure manometer connecting means 43.
  • Inner replaceable and adjustable wear bars such as indicated by the numerals 31, 33, 35 and 37 are provided all around the upper periphery of the connecting conduit 38. These bars are suitably fastened to the conduit 38, such as, for instance, by fasteners and can be adjusted to compensate for any wear. Access doors 39 and 41, as best shown in FIG. 3 are suitably provided on the sides of the housing 32 to facilitate the inspection and replacement of the wear bars 31, 33, 35 and 37. Of course, access door openings 45 and 47 must also be provided in the Walls of the housing 32.
  • the gate assembly 10 may be operated by any suitable power means such as, for instance, hydraulic or pneumatic actuator means, or as shown in FIG. 1 by an electric motor, suitable gear head 44 and pulley, the latter of which is suitably connected to the shaft 20 by means of a connecting belt or chain 46.
  • suitable power means such as, for instance, hydraulic or pneumatic actuator means, or as shown in FIG. 1 by an electric motor, suitable gear head 44 and pulley, the latter of which is suitably connected to the shaft 20 by means of a connecting belt or chain 46.
  • the entire two-gate assembly 1t and 19 illustrated in FIG. 1 is completely enclosed to form a vacuum-tight seal on the top of the furnace generally depicted as 48 when either gate and seal assembly is in the closed position.
  • a suitable cone 50 may be utilized with the apparatus of the invention if it is necessary for the charge material to be spread over the full cross-sectional area of the shaft furnace 48.
  • the operation of the gate and seal assemblies of the invention will be best understood with reference to FIG. 1.
  • the charge material to be fed into the furnace 4% is charged into the upper hopper 24.
  • both gate and seal assemblies are in the closed positions; that is, with the seal plates 26 and 26' fully covering the opening of conduits 33 and 38".
  • the system is gastight due to the pressure differential existing on the upper and lower faces of the seal plates 26 and 26.
  • the pressure in hopper 24' and housing 32' will invariably be atmospheric and the pressure in hopper 24 and housing 32 will depend on previous operation cycles and may also be equal to atmospheric or as low as that in the furnace 43.
  • the charge material to be passed into the furnace 48 is suitably disposed in the hopper 24' through top opening 52 whereupon it accumulates on the sector gate plate 22'.
  • the gate assembly it) and the seal assembly are then rotated together as a unit thus exposing conduit 38' and allowing the charge material to pass into hopper 24 and rest upon the sector gate plate 22. Since the exit end of hopper 24 is of smaller transverse dimensions than conduit 33, the solid charge material does not come into contact with the seating surfaces of the end of said conduit. After the charge has passed into lower hopper 24, the upper gate and seal assembly is rotated back to the closed position.
  • the double charging assembly makes it possible to batch charge a kiln or furnace on a continuous basis without loss of draft since the gate and seal assemblies are synchronized so that as one is open the other is closed and thus no loss can occur which would otherwise affect the kiln or furnace operation.
  • an gas introduced along with charge material into the lower hopper 24 may be suitably removed through a separate off-take pipe (not shown) connected to housing 32 rather than through the furnace 48 when the lower gate and seal assemblies are opened.
  • conduits may be of any desired cross-sectional shape; i.e., rectangular, oval, circular, etc.
  • a self-sealing hopper and gate assembly suitable for use in charging solid and plastic materials into a shaft furnace operating with a top pressure less than atmospheric which comprises, a first pair of hanger plates rotatably supported about a shaft, a cylindrical sector' gate plate rigidly secured to the lower ends of said first pair of hanger plates, a second pair of substantially shorter hanger plates loosely fastened to the lowermost portion of said first pair of hanger plates, a cylindrical sector seal plate rigidly secured to the lower ends of said second pair of hanger'plates, and means for rotating said first pair of hanger plates and said cylindrical sector gate plate about said shaft, said second pair of hanger plates and said cylindrical sector seal plate being adapted to move rotatably with said first pair of hanger plates and said cylindrical sector gate plate, said cylindrical sector gate plate adapted to control the flow of said charge materials to the lower discharge section of a hopper, the lower discharge section of said hopper being enclosed within a gas-tight housing which conforms in shape with the cylindrical form of said sector gate and seal plates and

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Details (AREA)
US390865A 1964-08-20 1964-08-20 Shaft furnace charger Expired - Lifetime US3233757A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE788477D BE788477Q (fr) 1964-08-20 Perfectionnements aux dispositifs de chargement de four
US390865A US3233757A (en) 1964-08-20 1964-08-20 Shaft furnace charger
DEU11865A DE1295756B (de) 1964-08-20 1965-07-07 Selbstabdichtende Beschickungsvorrichtung fuer einen Schachtofen od. dgl.
GB30526/65A GB1120278A (en) 1964-08-20 1965-07-19 Improvements in or relating to furnace chargers
NL656510753A NL141244B (nl) 1964-08-20 1965-08-17 Schachtoven, voorzien van een zelfafdichtende toevoerinrichting.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US390865A US3233757A (en) 1964-08-20 1964-08-20 Shaft furnace charger

Publications (1)

Publication Number Publication Date
US3233757A true US3233757A (en) 1966-02-08

Family

ID=23544256

Family Applications (1)

Application Number Title Priority Date Filing Date
US390865A Expired - Lifetime US3233757A (en) 1964-08-20 1964-08-20 Shaft furnace charger

Country Status (5)

Country Link
US (1) US3233757A (de)
BE (1) BE788477Q (de)
DE (1) DE1295756B (de)
GB (1) GB1120278A (de)
NL (1) NL141244B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499557A (en) * 1967-09-01 1970-03-10 Demag Ag Charging device for melting furnaces
US3572525A (en) * 1969-04-14 1971-03-30 Inland Steel Co Blast furnace charging apparatus
DE1629472B1 (de) * 1965-07-30 1972-05-25 Ici Ltd Verfahren zum verhindern von ablagerungen an einer einer giesswalze zur verfestigung gegossener thermoplastischer kunststoffilme zugeordneten elektrode
US4674534A (en) * 1986-06-18 1987-06-23 Hylsa, S.A. Particulate solids flow control valve
US20170307293A1 (en) * 2014-10-22 2017-10-26 Paul Wurth S.A. Device for cooling a shaft furnace distribution chute support journals

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3215730A1 (de) * 1982-04-28 1983-11-03 Metallgesellschaft Ag, 6000 Frankfurt Verschlussvorrichtung
LU86679A1 (fr) * 1986-11-21 1988-06-13 Wurth Paul Sa Mecanisme pour actionner un clapet de dosage
LU86680A1 (fr) * 1986-11-21 1988-06-13 Wurth Paul Sa Mecanisme pour actionner un clapet de dosage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840249A (en) * 1955-08-08 1958-06-24 James H Brodie Incinerator charging apparatus
US3095986A (en) * 1960-11-04 1963-07-02 United States Steel Corp Blast furnace tops

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840249A (en) * 1955-08-08 1958-06-24 James H Brodie Incinerator charging apparatus
US3095986A (en) * 1960-11-04 1963-07-02 United States Steel Corp Blast furnace tops

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1629472B1 (de) * 1965-07-30 1972-05-25 Ici Ltd Verfahren zum verhindern von ablagerungen an einer einer giesswalze zur verfestigung gegossener thermoplastischer kunststoffilme zugeordneten elektrode
US3499557A (en) * 1967-09-01 1970-03-10 Demag Ag Charging device for melting furnaces
US3572525A (en) * 1969-04-14 1971-03-30 Inland Steel Co Blast furnace charging apparatus
US4674534A (en) * 1986-06-18 1987-06-23 Hylsa, S.A. Particulate solids flow control valve
US20170307293A1 (en) * 2014-10-22 2017-10-26 Paul Wurth S.A. Device for cooling a shaft furnace distribution chute support journals
US10670339B2 (en) * 2014-10-22 2020-06-02 Paul Worth S.A. Device for cooling a shaft furnace distribution chute support journals

Also Published As

Publication number Publication date
DE1295756B (de) 1969-05-22
NL141244B (nl) 1974-02-15
BE788477Q (fr) 1973-01-02
GB1120278A (en) 1968-07-17
NL6510753A (de) 1966-02-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ELKEM METALS COMPANY, 270 PARK AVENUE, NEW YORK, N

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNION CARBIDE CORPORATION, A NY CORP.;REEL/FRAME:003882/0761

Effective date: 19810626

Owner name: ELKEM METALS COMPANY, A NEW YORK GENERAL PARTNERSH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNION CARBIDE CORPORATION, A NY CORP.;REEL/FRAME:003882/0761

Effective date: 19810626