US3138649A - Smoke hood for electric furnaces and the like - Google Patents

Smoke hood for electric furnaces and the like Download PDF

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Publication number
US3138649A
US3138649A US60017A US6001760A US3138649A US 3138649 A US3138649 A US 3138649A US 60017 A US60017 A US 60017A US 6001760 A US6001760 A US 6001760A US 3138649 A US3138649 A US 3138649A
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US
United States
Prior art keywords
smoke hood
smoke
furnace
wall members
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
US60017A
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English (en)
Inventor
Erni Enrico
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.)
Von Roll AG
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Von Roll AG
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Filing date
Publication date
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Publication of US3138649A publication Critical patent/US3138649A/en
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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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/30—Arrangements for extraction or collection of waste gases; Hoods therefor
    • F27D17/304—Arrangements for extraction or collection of waste gases; Hoods therefor specially adapted for electric arc furnaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/38—Removal of waste gases or dust
    • C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates generally to a protective covering or smoke shield for furnaces and, more particularly to a smoke hood particularly suitable for use in conjunction with open electrical furnaces.
  • a novel smoke hood for effectively collecting the smoke and stack gases emerging from the furnace and operating independently of and without contact with the furnace charge while still safely ensuring protection of the working area around the furnace.
  • the smoke hood should also be designed to facilitate physical access to the furnace interior and permit visual observation thereof in a reliable and dependable manner under all operating conditions without unduly increasing the cost of its manufacture and installation. Accordingly, there is provided a smoke hood having a housing member consisting of a plurality of telescopically arranged wall portions adapted to be displaced relative to one another, said wall portions being arranged circumjacent an electrode holder member adapted to carry the electrode.
  • the smoke hood is provided with insulating means suitably electrically insulating the electrode holder member from the slidable and telescopically arranged housing.
  • the smoke hood may also be provided with one or more flues for directing the gases to a desired location. Additionally, it has been found advantageous to provide inspection windows on the housing member and also to provide the wall portions thereof with cooling compartments to prevent undue heating of the smoke hood by the effluent gases and smoke.
  • a smoke hood constructed in accordance with the teachings of the present invention resides in the fact that it can be installed on existing furnaces without great difficulty; it ensures protection against the smoke and gas emanating from the furnace even when the volume thereof is substantial; it readily permits visual inspection of the furnace interior; and the smoke hood can at all times be partially or fully raised for charging, checking, cleaning or any other desired operation so as to render accessible the furnace interior and the electrode.
  • Yet another object of the present invention is the provision of a smoke hood for electric furnaces which can be easily accommodated thereon, is relatively simple in construction but highly efiicient in operation, and is safe during its operation.
  • FIGURE 1 is a vertical sectional view of the upper portion of an open electric furnace employing electrode means and provided with a smoke hood constructed in accordance with the teachings of the present invention
  • FIGURE 2 is a plan view of the device shown in FIG- URE 1;
  • FIGURE 3 is an enlarged view of a wall portion of the smoke hood shown in FIGURE 1 and provided with a viewing window;
  • FIGURE 4 is an enlarged View of a wall portion of the smoke hood shown in FIGURE 1 provided with cooling compartments.
  • a smoke hood A is provided with an upper stationary annular wall member 1 supporting on its upper surface In one or more flues 2 communicating with the furnace interior via the apertures 2a.
  • the further wall members 3 and 4 Disposed below the upper wall member 1 are the further wall members 3 and 4 which are arranged for sliding telescopic movement with respect to one another.
  • Each of the wall members are provided with the laterally projecting annular ribs 1b serving to slidably interconnect adjacent wall members to permit said telescopic movement in order to expose the interior of a furnace 6 and its electrode 5 mounted in an electrode holder 7 circumjacent to which the smoke hood A is arranged.
  • FIGURE 1 shows the housing of the smoke hood A consisting of the relatively movable wall members 1, 3 and 4 in raised position to permit access to the furnace interior, whereas the right-hand portion of FIGURE 1 shows the housing lowered almost to the extent of the upper surface 6a of the furnace. It is, of course, to be understood that any number of individual wall members may be employed depending upon the desired height of the smoke hood and the physical dimensions of the furnace to which it is applied.
  • an insulating ring 8 formed of an electrically non-conductive, mechanically and thermally stable material, as for example, asbestos, or a ceramic material or the like.
  • This insulating ring 8 performs a dual function, to wit: it must on the one hand electrically insulate the current-carrying electrode holder 7 from the smoke hood A to safeguard against passage of current/to the smoke hood A and the furnace 6; Whereas, on the other hand, it must permit a relative movement of the electrode holder 7 with respect to the wall member 1 of said smoke hood in the direction of the double headed arrow BB to allow for a change -aldehye condensate. be dispensed with entirely and be replaced by a nonconductive layer, by way of example formed of mica,
  • suitableinsulation means is not particularly important-for the smoke hood A insofar as its ability'to remove smokeandwastegases is concerned, it ;is, howsections and using several electrodes.
  • this ring s' may also be formedof a synthetic material such as a phenol form-
  • the insulating'ring 8 maynaturally or a sufliciently thermally stable insulating coating
  • Theparticularsmokeflues 2 employed must be suitably dimensioned in accordance with the prevailing condi- 'tions-of operation.
  • the arrangement and operation of the apparatus and, in particular, the number of flues em- ⁇ ployed must be adapted to the volume of smoke desired to be removed.
  • Any known or conventional fluid conveying means such as fans, blowers, steam. ejectors or the like may be employedto aid in the exhaustion of the waste gases from the furnace.
  • electric furnace-6 is provided with a circular cross-section and one electrode 5 is employed. understood that furnaces having other cross-sectional It is, of course, to be configurations and employing a plurality of electrodes maybe equipped with the smoke hood A designed according to the teachingsof the'present invention.
  • the smoke, hood A may-obturate furnaces having rectangular, hexagonal, polygonal or oval cross-
  • the hood must then naturally be designed with a correspondingly shaped cross-section so that-ibwill cover the entire furnace'interior andenclosesthe corresponding number of electrodes,'in -a manner illustrated in FIGURE .2.
  • the smoke hood A is preferably formed of sheet iron or steel. But'other metals, such-as aluminum, may also be advantageously employed while keeping under consideration thethermal stability-of thematerial to be employed.
  • the telescopically-displaceable members 3 and 4 are preferably designed'as shown in detail in FIGURE 3and are provided with the laterally extending rib portions or flanges 1b engaging adjacent flanges of the adjacently arranged wall portions topermitsuch sliding and telescopic movement as already detailed hereinaboveh
  • the -r1b portions 1b not only serve to interconnect the respective wall portions 1, 3 and 4 of the smoke hood A but define limit stops for determining the extent of movement of said wall portions in their fully raised and lowered-positions.
  • at least some of the wall members may be providedwith windows 12 as clearly shown in.FIG-
  • the window jl2w may be formed of any suitable transparent ing with the rib portion 1b and returned to said source via the flexible return conduit 14.
  • Other possible cooling system depending on the conditions of operation of the smoke hood may be provided. If a water cooling system is provided which washes the entire outer surface of the telescopically displaceable members of the hood housing, care must be taken to ensure that the cooling medium does not enter the interior of the smoke hood.
  • raising and lowering movement of the displaceable wall members by means of mechanical means actuated by any conventional motor, or to provide a pulley system to gain a mechanical advantage in order to move the wall members relative to one another.
  • raising and lowering movement can be carried out by any conventional pneumatic or hydraulic device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (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)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)
US60017A 1959-10-06 1960-10-03 Smoke hood for electric furnaces and the like Expired - Lifetime US3138649A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH7907259A CH372111A (de) 1959-10-06 1959-10-06 Rauchhaube an einem Elektroofen

Publications (1)

Publication Number Publication Date
US3138649A true US3138649A (en) 1964-06-23

Family

ID=4536964

Family Applications (1)

Application Number Title Priority Date Filing Date
US60017A Expired - Lifetime US3138649A (en) 1959-10-06 1960-10-03 Smoke hood for electric furnaces and the like

Country Status (6)

Country Link
US (1) US3138649A (en, 2012)
BE (1) BE595751A (en, 2012)
CH (1) CH372111A (en, 2012)
DE (2) DE1172401B (en, 2012)
GB (1) GB913088A (en, 2012)
LU (1) LU39238A1 (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223399A (en) * 1962-11-26 1965-12-14 Kaiser Ind Corp Apparatus for oxygen conversion of iron to steel
US3347539A (en) * 1964-10-23 1967-10-17 Koppers Co Inc Exhaust receiving hood
US20090274190A1 (en) * 2006-09-02 2009-11-05 Gerhard Fuchs Melting furnace, in particular electric arc furnace
CN106180116A (zh) * 2016-08-31 2016-12-07 兰州兰石重工有限公司 中频炉烟尘捕集装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US228075A (en) * 1880-05-25 Fume-pipe for cooking-stoves
US806648A (en) * 1904-04-22 1905-12-05 Paul Dickinson Smoke-stack.
US818003A (en) * 1905-05-22 1906-04-17 Adolf Anderson Draft attachment for cook-stoves.
US913465A (en) * 1908-04-29 1909-02-23 Arthur Brouillet Stove-hood.
CH198255A (de) * 1936-10-24 1938-06-15 Metallgesellschaft Ag Einrichtung zum Auffangen und Absaugen der Abgase an staubhaltige Gase oder Dämpfe erzeugenden Schmelzanlagen, insbesondere Elektroschmelzöfen.
US2210370A (en) * 1938-08-02 1940-08-06 Herradora Juan Rafael Portable protective chamber for arc welders
US2766736A (en) * 1951-06-09 1956-10-16 Celso Ciamberlini Electric arc furnace, water cooled, roof door
US2929858A (en) * 1956-09-13 1960-03-22 Zd Y Rudych Letnic 1930 Narodn Exhaust hoods for electric arc furnaces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE540347C (de) * 1929-10-05 1931-12-14 Metallgesellschaft Ag Vorrichtung zum Auffangen und Absaugen der Abgase aus Gase, Daempfe oder Rauch erzeugenden Anlagen
DE718820C (de) * 1941-02-21 1942-03-21 Fritz Hager Absaugevorrichtung an Elektroschmelzoefen
DE1710350U (de) * 1955-08-01 1955-11-10 Koppers Gmbh Heinrich Koksofenfuellwagen mit einrichtung zum absaugen der fuellgase.
DE1039712B (de) * 1956-11-02 1958-09-25 Elektrokemisk As Vorrichtung zum Ableiten von Ofengasen bei elektrischen dreiphasigen Schmelzoefen
DE1690308A1 (de) * 1967-10-04 1971-05-13 Friedrich Tonne Magnetisch betaetigte Tuerschalter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US228075A (en) * 1880-05-25 Fume-pipe for cooking-stoves
US806648A (en) * 1904-04-22 1905-12-05 Paul Dickinson Smoke-stack.
US818003A (en) * 1905-05-22 1906-04-17 Adolf Anderson Draft attachment for cook-stoves.
US913465A (en) * 1908-04-29 1909-02-23 Arthur Brouillet Stove-hood.
CH198255A (de) * 1936-10-24 1938-06-15 Metallgesellschaft Ag Einrichtung zum Auffangen und Absaugen der Abgase an staubhaltige Gase oder Dämpfe erzeugenden Schmelzanlagen, insbesondere Elektroschmelzöfen.
US2210370A (en) * 1938-08-02 1940-08-06 Herradora Juan Rafael Portable protective chamber for arc welders
US2766736A (en) * 1951-06-09 1956-10-16 Celso Ciamberlini Electric arc furnace, water cooled, roof door
US2929858A (en) * 1956-09-13 1960-03-22 Zd Y Rudych Letnic 1930 Narodn Exhaust hoods for electric arc furnaces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223399A (en) * 1962-11-26 1965-12-14 Kaiser Ind Corp Apparatus for oxygen conversion of iron to steel
US3347539A (en) * 1964-10-23 1967-10-17 Koppers Co Inc Exhaust receiving hood
US20090274190A1 (en) * 2006-09-02 2009-11-05 Gerhard Fuchs Melting furnace, in particular electric arc furnace
CN101529191B (zh) * 2006-09-04 2013-03-20 福斯技术控股股份公司 熔炉，特别是电弧炉
CN106180116A (zh) * 2016-08-31 2016-12-07 兰州兰石重工有限公司 中频炉烟尘捕集装置

Also Published As

Publication number Publication date
BE595751A (fr) 1961-02-01
DE1909719U (de) 1965-02-11
CH372111A (de) 1963-09-30
GB913088A (en) 1962-12-19
LU39238A1 (en, 2012) 1960-12-01
DE1172401B (de) 1964-06-18

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