US3754855A - Tower furnace reciprocating feed - Google Patents

Tower furnace reciprocating feed Download PDF

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Publication number
US3754855A
US3754855A US00172489A US3754855DA US3754855A US 3754855 A US3754855 A US 3754855A US 00172489 A US00172489 A US 00172489A US 3754855D A US3754855D A US 3754855DA US 3754855 A US3754855 A US 3754855A
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US
United States
Prior art keywords
furnace
cover plate
feed
streams
slot
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
US00172489A
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English (en)
Inventor
E Siemssen
J Hummel
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.)
Selas Corp of America
SELAS CORP
Original Assignee
Selas Corp of America
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 Selas Corp of America filed Critical Selas Corp of America
Application granted granted Critical
Publication of US3754855A publication Critical patent/US3754855A/en
Assigned to FIRST PENNSYLVANIA BANK N A, A NATIONAL BANKING ASSOCIATION reassignment FIRST PENNSYLVANIA BANK N A, A NATIONAL BANKING ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SELAS CORPORATION OF AMERICA A CORP OF PA
Assigned to SELAS CORPORATION OF AMERICA A CORP. OF PA reassignment SELAS CORPORATION OF AMERICA A CORP. OF PA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: FIRST PENNSYLVANIA BANK N.V., FOR ITSELF AND AS AGENT FOR THE PHILADELPHIA NATIONAL BANK
Assigned to BANCBOSTON FINANCIAL COMPANY reassignment BANCBOSTON FINANCIAL COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SELAS CORPORATION OF AMERICA
Assigned to SELAS CORPORATION OF AMERICA reassignment SELAS CORPORATION OF AMERICA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANCBOSTON FINANACIAL COMPANY A MA TRUST
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B5/00—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping
    • B28B5/02—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type
    • B28B5/026—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length
    • B28B5/027—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length the moulding surfaces being of the indefinite length type, e.g. belts, and being continuously fed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles

Definitions

  • the present invention relates to the operation of tower furnaces, and more particularly to a method and apparatus for dropping particles to be bloated through a furnace in a pattern to produce a ceramic foam product having a substantially flat top surface.
  • a tower furnace is provided with a feed slot extending across the top of the furnace.
  • a plate having a plurality of feed orifices therein, aligned with said slot.
  • Means is provided to reciprocate the plate slowly in the direction of the feed slot, thereby moving the orifices 'to shift the locations from which the particles are dropped.
  • FIG. 1 is a section taken on line 11 of FIG. 2.
  • FIG. 2 is a section taken on line 2-2 of FIG. 1.
  • the number 1 indicates a tower furnace, only the upper and lower portions of which have been shown.
  • the furnace is normally from to 30 feet high and consists of a vertically extending furnace chamber, opposite sides of which are provided
  • the belt is preferably made of metallic mesh to with.- stand the temperatures that are encountered and it is shown as being driven from one end by a roll 6, with the edges of the belt beyond the sides of the furnace being supported for horizontal travel on a pair of rails 5.
  • the belt with the product on it is moved to the right in FIG. 2 from beneath the furnace into an annealing section7 in which the product is annealed.
  • There is also provided to the left of the furnace a hopper 8 in which a parting agent 9, such as sand, is deposited in a layer on the belt prior to the time it moves into the lower portion of the furnace chamber.
  • the upper end of the chamber is provided with a feed slot 11 which extends transversely in the direction of belt movement.
  • This slot is covered by a cover plate 12 that consists of a structural steel frame 13 filled with a refractory material 14.
  • the cover plate is mounted for reciprocation in the direction of the slot.
  • the ends of the frame 13 are provided with plates 15 that rest upon suitably mounted rollers 16.
  • the cover plate 12 is provided with a plurality of feed orifices 17 that are supplied with the material to be heated through flexible tubes 18, the upper ends of which are connected to a supply hopper. It is noted that the lower ends of the feed tubes are held in position over the feed orifices by means of brackets 21.
  • the cover plate with its feed orifices is reciprocated in the direction of the slot and transversely to the belt .by means of a constant speed, reversible motor 22 that is mounted on a suitable frame 23. This motor drives .a threaded shaft 24 that is journaled in and held from axial movement by bearings 25 fastened to frame 23. As the shaft is rotated a sleeve 26 is moved axially thereof.
  • This sleeve is attached to an arm 27 fastened to one of the plates 15.
  • the sleeve 26 will be reciprocated and the cover plate will be reciprocated therewith.
  • Sleeve 26 has an actuating pin 28 projecting upwardly therefrom. As the sleeve is moved back and forth this actuating pin will strike one or another of limit switches 29 and 30 which serve to reverse the direction of travel of the motor and the movement of the cover plate and its feed orifices.
  • the limit switches can be adjusted along frame 23 in order to determine the stroke of the cover.
  • small clay particles, or similar material that will bloat or be fused will be loaded in hopper 19.
  • the particles flow through tubes 18 and orifices 17 to fall through the furnace.
  • These bodies collect on belt 4 to a thickness depending upon the volume of the supply of particles and the speed of the belt.
  • the particles stick together to form a cellular product known as ceramic foam.
  • the belt moves the product through annealing oven 7 where it is cooled before being cut tosize.
  • the particles were supplied to the furnace through stationary orifices located in various patterns in the top of the furnace.
  • the collected particles produced a slab with an upper surface having a plurality of ridges and depressionsiacross the strip.
  • This non-uniform thickness of the slab can cause a variation in the texture of the productas well as result in considerable waste in the product when it is cut to a uniform thickness.
  • the feed orifices 17 are moved at a uniform speed back and forth transversely of the furnace.
  • the pattern of the falling particles is such that they form a slab 32 having a substantially flat top surface with a relatively sharp cut-off at the edges.
  • orifices 17 are spaced 6 inches apart and the orifices are reciprocated through a distance of 6 inches at a speed of 1 inch a second. Regardless of the spacing of the feed orifices, the distance that they are moved as they are reciprocated is a multiple of the spacing of the orifices.
  • Motor 22 runs at a constant speed and is periodically reversed as pin 28 operates either one or the other of limit switches 29 and 30. As mentioned above, these switches can be adjusted along frame 23 to vary the stroke of cover-12 and the feed orifices.
  • a tower furnace having an upper end and a lower end, means forming aligned openings in opposite sides of said lower end, a collecting belt extending through said openings across the lower end of said furnace, means to move said belt, said belt having a substantially flat horizontal collecting surface, the
  • said furnace being provided with a feed slot extending transversely of said belt, a cover plate over said slot, means to reciprocate said cover plate in the direction of said slot, said cover plate being provided with a plurality of feed orifices aligned with said slot whereby as said cover plate is reciprocated said orifices are moved back and forth along said slot, and means to supply particles to be heated to said orifices.
  • the method of claim 4 including collecting the dropped material in a slab having a substantially flat upper surface at the lower end of the furnace and removing it from the furnace in a direction transverse to the direction of the reciprocation of the feed streams.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
US00172489A 1971-08-17 1971-08-17 Tower furnace reciprocating feed Expired - Lifetime US3754855A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17248971A 1971-08-17 1971-08-17

Publications (1)

Publication Number Publication Date
US3754855A true US3754855A (en) 1973-08-28

Family

ID=22627907

Family Applications (1)

Application Number Title Priority Date Filing Date
US00172489A Expired - Lifetime US3754855A (en) 1971-08-17 1971-08-17 Tower furnace reciprocating feed

Country Status (5)

Country Link
US (1) US3754855A (xx)
AU (1) AU4540972A (xx)
CA (1) CA970562A (xx)
DE (1) DE2239684C3 (xx)
NL (1) NL7210768A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52135323A (en) * 1976-05-10 1977-11-12 Shibata Hario Glass Kk Apparatus for charging glass material in electric melting furnace
US4701101A (en) * 1984-03-13 1987-10-20 Catalyst Technology, Inc. Modular multi-tube catalyst loading funnel
CN108839222A (zh) * 2018-08-27 2018-11-20 河北隽唐科技有限公司 白灰窑无线通讯布料小车

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52135323A (en) * 1976-05-10 1977-11-12 Shibata Hario Glass Kk Apparatus for charging glass material in electric melting furnace
JPS5619289B2 (xx) * 1976-05-10 1981-05-07
US4701101A (en) * 1984-03-13 1987-10-20 Catalyst Technology, Inc. Modular multi-tube catalyst loading funnel
CN108839222A (zh) * 2018-08-27 2018-11-20 河北隽唐科技有限公司 白灰窑无线通讯布料小车

Also Published As

Publication number Publication date
DE2239684B2 (de) 1974-12-12
DE2239684C3 (de) 1975-07-24
DE2239684A1 (de) 1973-02-22
AU4540972A (en) 1974-02-14
CA970562A (en) 1975-07-08
NL7210768A (xx) 1973-02-20

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Legal Events

Date Code Title Description
AS Assignment

Owner name: FIRST PENNSYLVANIA BANK N A 19TH FL.CENTRE SQ WEST

Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA A CORP OF PA;REEL/FRAME:003997/0981

Effective date: 19820217

AS Assignment

Owner name: SELAS CORPORATION OF AMERICA A CORP. OF PA

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST PENNSYLVANIA BANK N.V., FOR ITSELF AND AS AGENT FOR THE PHILADELPHIA NATIONAL BANK;REEL/FRAME:004096/0520

Effective date: 19821231

AS Assignment

Owner name: BANCBOSTON FINANCIAL COMPANY,MASSACHUSETTS

Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA;REEL/FRAME:004557/0143

Effective date: 19860529

Owner name: BANCBOSTON FINANCIAL COMPANY, 100 FEDERAL STREET,

Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA;REEL/FRAME:004557/0143

Effective date: 19860529

AS Assignment

Owner name: SELAS CORPORATION OF AMERICA, PENNSYLVANIA

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCBOSTON FINANACIAL COMPANY A MA TRUST;REEL/FRAME:004945/0988

Effective date: 19880805

Owner name: SELAS CORPORATION OF AMERICA, DRESHER, PA 19025 A

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCBOSTON FINANACIAL COMPANY A MA TRUST;REEL/FRAME:004945/0988

Effective date: 19880805