US3737554A - Electric smelting furnace of closed-type having dust removing means fixed to exhaust gas vent pipes thereof - Google Patents

Electric smelting furnace of closed-type having dust removing means fixed to exhaust gas vent pipes thereof Download PDF

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Publication number
US3737554A
US3737554A US00242976A US3737554DA US3737554A US 3737554 A US3737554 A US 3737554A US 00242976 A US00242976 A US 00242976A US 3737554D A US3737554D A US 3737554DA US 3737554 A US3737554 A US 3737554A
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US
United States
Prior art keywords
furnace
lid
dual service
pipe
exhaust gas
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
US00242976A
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English (en)
Inventor
K Horibe
T Yosida
T Machida
S Kaneko
T Sato
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Tanabe Kakoki Co Ltd
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Tanabe Kakoki Co Ltd
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Filing date
Publication date
Application filed by Tanabe Kakoki Co Ltd filed Critical Tanabe Kakoki Co Ltd
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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
    • F27D3/18—Charging particulate material using a fluid carrier

Definitions

  • the furnace has at least two dual service pipes, each of which functions as a raw material charging chute and concurrently as an exhaust gas vent pipe with the aid of its branch pipe, and a plural number of single raw material charging chutes through the furnace lid, whereby each dual service pipe has an automatic dust removing machine at the forked position thereof.
  • FIG-4 ELECTRIC SMELTING FURNACE OF CLOSED-TYPE HAVING DUST REMOVING MEANS FIXED TO EXHAUST GAS VENT PIPES THEREOF
  • This invention relates to an electric smelting furnace of closed-type, and more particularly to the one having dust removing means fixed to exhaust gas vent pipes thereof.
  • An object of the present invention is to manufacture a ferroalloy necessitating an extremely high temperature smelting by the use of closed-type electric furnace.
  • Another object of the present invention is to provide a closed-type electric furnace suitable for the continuous production of 70% ferro'silicon or metallic silicon.
  • FIG. 1 is a longitudinal cross-sectional view, taken along the line AA in FIG. 2, of the upper portion of a preferred embodiment of closed-type electric furnace according to the present invention
  • FIG. 2 is a cross-sectional plan view of the same taken along the line B-B in FIG. 1;
  • FIG. 3 is an enlarged plan view of dust removing machine 10 attached to a dual service pipe 1 in FIG. 1;
  • FIG. 4 is a longitudinal sectional view of the same taken along the line D-D in FIG. 3;
  • FIG. 5 is an enlarged plan view of another dust removing machine attached to a dual service pipe; and FIG. 6 is a longitudinal sectional view of the same taken along the line E-E in FIG. 5.
  • the reference numeral 1 designates a plurality of raw material charging chutes, each of which being designed to serve concurrently as an exhaust gas vent pipe.
  • This kind of chute pipe will be referred to in this specification as a dual service pipe hereinafter.
  • the dual pipe 1 has a branch pipe 7 for gas exhaustion at a forked position 7a, and is equipped with an automatically acting dust removing machine 10 at this position.
  • the number of dual pipe is three in this case.
  • the furnace lid 20 is dotted with a plural number of single raw material charging chutes therethrough (in FIG. 2, the number thereof being seven,) near the three electrodes 9 in a usual way.
  • Imaginary lines designated by the reference numeral 2 or 3 show examples of the mounting position and configuration of conventional sole exhaust gas vent. In the present invention, however, such conventional mounting positions can not be adopted by the following reason (1).
  • the manners in which the dust may invite clogging in the electric furnace are roughly classified into the following three types: (1 the dust is accumulated in a peripheral space of the furnace lid 20; (2) the dust is deposited on the interior surface of each dual service pipe 1 at the lower part thereof, and the deposition increases in thickness gradually until it invites such clogging as denoted by the reference numeral 5; and (3) the dust is deposited at the forked position 7a of each dual service pipe 1 as shown by the reference numeral 6.
  • At least two, preferably three or more, dual service pipes 1 should be set up through the furnace lid 20 at as near positions as possible to the electrodes 9 as shown in FIGS. 1 and 2.
  • the dust removing machine 10 permits a long-type operation with unchanged performance and safety upon the production of metallic silicon or 70% ferrosilicon which accompanies a large quantity of coagulative dust in the exhaust gas generated by the reductive reaction in the furnace.
  • FIGS. 3 and 4 Detailed views of the dust removing machine 10 in FIG. 1 are shown in FIGS. 3 and 4.
  • a cleaning piston disc 13 is arranged in a horizontal portion at the juncture of ascending portion 11 of the chute having a water cooling jacket 17 and descending branch pipe 12 of the dual service pipe.
  • Said cleaning piston disc 13 is connected to a piston rod 14 of the dust removing machine 16 to make said cleaning disc 13 drive reciprocally, and the driving may be performed either continuously or intermittently and automatically by a suitable mechanism (not shown in the figure).
  • the accumulated and coagulated dust on the juncture part is pushed down into the descending branch pipe 12 by the moving disc 13, and the dust thus swept off is flashed away with water which is injected into the branch pipe 12 from water spray nozzles affixed to said branch pipe 12.
  • FIGS. 5 and 6 show another embodiment of the dust removing machine according to the present invention.
  • a cylindrical rotary disc 24 is disposed on a horizontal juncture end of ascending chute portion 21 in the top part of descending branch pipe 22 of the dual service pipe, and has a vertical cleaning blade 23 fixed thereto.
  • the cylindrical rotary disc 24 is connected to a motor 27 by means of gears 26 and a shaft 25 so as to rotate the cleaning blade 23 around the vertical axis of the cylindrical rotary disk 24, whereby the rotation is performed continuously or intermittently and automatically to sweep off the deposited dust at the juncture portion.
  • the dust thus swept off is flashed away with water which is injected into the branch pipe 22 from water spray nozzles 28 affixed to saidbranch pipe 22.
  • An improved electric smeltingfurnace of the closed-type which comprises a furnace lid, a plurality of single raw material charging chutes having their discharge end extending through said lid, a plurality of dual service pipes extending at their discharge end through said lid, each of said dual service pipes comprising a raw material charging chute and an exhaust gas vent pipe, said chute and vent pipe being joined at a forked position above said lid and automatically operated means to remove dust from the junction of said chute and vent pipe at said forked position.
  • An improved electric furnace used forextremely high temperature smelting of a ferroalloy according to claim 1, wherein said automatically operated means comprises a reciprocating cleaning piston'disc connected with a horizontal piston rod and an automatic driving apparatus therefor.
  • each dual service pipe comprises'a lower chute portion having an upper-end that terminates within said forked position and said automatically operated means to remove dust comprises'a cylindrical rotary disc horizontally disposed on said upper end of said lower chute portion, a vertical cleaning blade fixed to said rotary disc and drive means to rotate said rotary disc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US00242976A 1971-04-14 1972-04-11 Electric smelting furnace of closed-type having dust removing means fixed to exhaust gas vent pipes thereof Expired - Lifetime US3737554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46023566A JPS4848305A (fi) 1971-04-14 1971-04-14

Publications (1)

Publication Number Publication Date
US3737554A true US3737554A (en) 1973-06-05

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ID=12114066

Family Applications (1)

Application Number Title Priority Date Filing Date
US00242976A Expired - Lifetime US3737554A (en) 1971-04-14 1972-04-11 Electric smelting furnace of closed-type having dust removing means fixed to exhaust gas vent pipes thereof

Country Status (5)

Country Link
US (1) US3737554A (fi)
JP (1) JPS4848305A (fi)
BR (1) BR7202231D0 (fi)
SU (1) SU520056A3 (fi)
ZA (1) ZA722229B (fi)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010313A (en) * 1975-03-04 1977-03-01 Donau Chemie Aktiengesellschaft Device for effecting a gastight closure
US4451925A (en) * 1982-09-13 1984-05-29 Hylsa, S.A. Charging system for electric arc furnaces
US4697274A (en) * 1984-09-18 1987-09-29 Voest-Alpine Aktiengesellschaft Electric melting furnace arrangement as well as a method of influencing the composition of a mineral melt for producing wool
WO1997032047A1 (en) * 1996-03-01 1997-09-04 Peter George Dunkel Hermetically closeable smelting/refining furnace
WO2002001131A1 (en) * 2000-06-29 2002-01-03 Outokumpu Oyj Apparatus for removing dust accretions from a smelting furnace
US10101090B2 (en) 2016-07-18 2018-10-16 Owens-Brockway Glass Container Inc. Duct cleaning and valve device for furnace system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103884182B (zh) * 2014-04-16 2015-08-19 江苏藤仓亨通光电有限公司 一种回收铜头装置及其使用方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372223A (en) * 1964-01-14 1968-03-05 Pechiney Prod Chimiques Sa Electric arc reduction furnace and method
US3441651A (en) * 1966-02-23 1969-04-29 Canadian Patents Dev Method and apparatus for heat recovery in electric arc furnaces
US3598888A (en) * 1968-10-03 1971-08-10 Yoshinosuke Tada Electric smelting furnace

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372223A (en) * 1964-01-14 1968-03-05 Pechiney Prod Chimiques Sa Electric arc reduction furnace and method
US3441651A (en) * 1966-02-23 1969-04-29 Canadian Patents Dev Method and apparatus for heat recovery in electric arc furnaces
US3598888A (en) * 1968-10-03 1971-08-10 Yoshinosuke Tada Electric smelting furnace

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010313A (en) * 1975-03-04 1977-03-01 Donau Chemie Aktiengesellschaft Device for effecting a gastight closure
US4451925A (en) * 1982-09-13 1984-05-29 Hylsa, S.A. Charging system for electric arc furnaces
US4697274A (en) * 1984-09-18 1987-09-29 Voest-Alpine Aktiengesellschaft Electric melting furnace arrangement as well as a method of influencing the composition of a mineral melt for producing wool
WO1997032047A1 (en) * 1996-03-01 1997-09-04 Peter George Dunkel Hermetically closeable smelting/refining furnace
WO2002001131A1 (en) * 2000-06-29 2002-01-03 Outokumpu Oyj Apparatus for removing dust accretions from a smelting furnace
US20040012130A1 (en) * 2000-06-29 2004-01-22 Risto Saarinen Apparatus for removing dust accretions from a smelting furnace
US6797229B2 (en) 2000-06-29 2004-09-28 Outokumpu Oyj Apparatus for removing dust accretions from a smelting furnace
US10101090B2 (en) 2016-07-18 2018-10-16 Owens-Brockway Glass Container Inc. Duct cleaning and valve device for furnace system

Also Published As

Publication number Publication date
JPS4848305A (fi) 1973-07-09
ZA722229B (en) 1972-12-27
SU520056A3 (ru) 1976-06-30
BR7202231D0 (pt) 1973-09-25

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