US3588274A - Metallurgical manipulator - Google Patents

Metallurgical manipulator Download PDF

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Publication number
US3588274A
US3588274A US787467A US3588274DA US3588274A US 3588274 A US3588274 A US 3588274A US 787467 A US787467 A US 787467A US 3588274D A US3588274D A US 3588274DA US 3588274 A US3588274 A US 3588274A
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US
United States
Prior art keywords
manipulator
slag
metallurgical
blades
shafts
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
US787467A
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English (en)
Inventor
Sven Erik Malte Norlindh
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INVA AB
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INVA AB
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Filing date
Publication date
Application filed by INVA AB filed Critical INVA AB
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Publication of US3588274A publication Critical patent/US3588274A/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
    • F27D27/00—Stirring devices for molten material
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • 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
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/1554—Equipment for removing or retaining slag for removing the slag from the surface of the melt
    • F27D3/1563—Equipment for removing or retaining slag for removing the slag from the surface of the melt by the use of scrapers
    • 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
    • Y10S366/00—Agitating
    • Y10S366/608—Stirrer in mixing chamber side wall

Definitions

  • This invention relates to a metallurgical manipulator for achieving motion in molten metals and/or slag.
  • the manipulator preferrably consists of two shafts insulated against heat by a ceramic coating, the shafts being driven at one end by a hydraulic motor and at the other end being provided with ceramic blades coordinated propeller-shaped or parallel with the shaft, rotating towards each other.
  • FIG. 5 is a diagrammatic representation of FIG. 5.
  • the main object of this invention is to produce a simple and effective device to achieve motion in molten metals and/or slag.
  • a further object is to produce a device, by which a mo.- tion is achieved in molten metals and/or slag in furnaces or ladles of different types. It can thus be introduced into the furnace or the ladle from the top or the side and be adapted to the majority of the anticipated needs.
  • the metallurgical manipulator according to the present invention is characterized in that it consists of at least one shaft insulated against heat by means of a ceramic coating, the shaft at one end being driven by, for example, a hydraulic motor and at the other end being provided with ceramic blades either propeller-shaped or parallel with the shaft.
  • the shaft is mounted at its driven end in a bearing housing connected to a lever arm and a hydraulic cylinder, hence the manipulator is adjustable to different angles of elevation.
  • the manipulator consists of two shafts, motors and blades arranged side by side. At least one of the bearing housings is made to swivel in relation to the other by means of a hydraulic cylinder, whereby the distance between the blades and the angle between the shafts may be varied.
  • these combined manipulations produce circulation within the metallurgical container or, if the blades are only immersed in the slag, the slag is discharged from the metallurgical container or, if the blades are immersed in some intermediate position, they produce a mixture of slag and/or added slag formers and/or alloying elements and the molten metal, while at the same time the components are made to circulate within the metallurgical container.
  • a manipulator unit to a fork lift truck
  • the manipulator unit consisting of two manipulator shafts with blades, driving devices and adjustment devices for placing one of the manipulator shafts at a side angle in relation to the other and a quick-coupling device for attaching the manipulator unit to the fork lift truck, the fork lift truck transporting, supporting and adjusting the height, angle of elevation and side angle of the manipulator shafts.
  • FIG. 1 is a cross section along line I-I in FIG. 2 through part of an open hearth furnace with the metallurgical manipulator immersed in the slag layer for slag removal.
  • FIG. 2 shows an angular horizontal section along line II-II in FIG. 1;
  • FIG. 3 shows a longitudinal section through a manipulator rod with propeller-shaped blades.
  • FIG. 4 shows a side view of a four-blade propeller.
  • FIG. 5 shows a view from the bottom of the propeller in accordance with line V-V in FIG. 3.
  • FIG. 6 shows a side view of the lower part of themanipulator rod with 2 blades parallel with the manipulator shaft.
  • FIG. 7 shows a view in accordance with line VII-VII in FIG. 6.
  • FIG. 1 indicates the molten metal and 2 a slag layer in open hearth furnace II with vault l2.
  • Manipulator rods 3 have been introduced through hole IS in furnace door 14 through opening I3 into slag layer 2.
  • the manipulator rods 3 are mounted in bearing housing 16 and driven by variable-speed hydraulic motors 17 with a reversible motion and may be set to the desired angle of elevation by means of pivot bearing I9, pivot arm 18 and cylinder 20.
  • the manipulator with its drive and setting equipment is mounted on plate 21, suitably quick-coupled to a fork lift truck 22.
  • FIG. 2 shows a top view of the manipulator with pivot point 23 and cylinder 24 for setting the distance between the manipulator blades and adjusting the lateral position.
  • FIG. I the dotted lines in FIG 2 shows a groove or pipe for the supply of slag formers and/or alloying elements which may be feed in pneumatically or by means of a vibrator.
  • FIG. 3 shows a section through the manipulator rod, where propeller boss 32 and propeller blades 31 of ceramic material are fixed with screws 36 and a head 34 with spline 35 to the center rod 37 protected against the heat by ceramic coating 38 and bottom plug 33.
  • Center rod 37 as well as splined head 34 and screws 36 may slidably be made of high-temperature alloy since one is unwilling to resort to water cooling.
  • the propeller boss may be made with some other type of fixing, for example, a taper thread at the end of center rod 37.
  • the center rod is made for quick-coupling with supported shaft 39, for example, with a taper pin 40.
  • the 4-blade propeller 31, 32 is shown in greater detail in FIGS. 4 and 5.
  • the manipulator blades may even by shaped in some other suitable way, for example as in FIGS. 6 and 7, which may be suitable if the manipulator is to be immersed approximately perpendicularly in a ladle or a highor low frequency furnace or through an opening in the vault of a metallurgical furnace.
  • FIG. 1 the manipulator has been shown immersed only in slag layer 2 in a rotational direction 27, slag 2 being discharged over the door threshold according to arrow 28.
  • the propeller pitch, direction of rotation and rightor lefthanded propeller must be chosen so as to suit the characteristics of the slag.
  • new slag and/or alloying elements may be introduced according to arrow 26 via vibration pipe 25, whipped into molten metal I and circulated and dispersed all through the metal bath. Thereafter the slag removal process may be repeated.
  • the vibration pipe need only be pushed in for a short time and is then cooled from the inside by the additions.
  • desulfurization may be carried out in a small container, through which the pig iron is passing from the tap hole of a blast furnace, Desulfurization at the pig iron stage may even be carried out in a ladle or a pig iron mixer.
  • Desulfurization, dephosphorization, alloying and deoxidation may be carried out at the steel stage in an open furnace and in a ladle thanks to the thorough mixing of the steel and slag by means of a manipulator.
  • the manipulator allows for the intensive mixing of the slag and the metal bath while at the same time the components are being circulated, the time for finishing the melt is shortened. Thanks to the simple and effective removal of the slag it may be changed several times and a product having a higher quality may be achieved.
  • the movements required for the manipulator are an adjustment of the height, angle of inclination and distance between the blades of the manipulator rods and the lateral adjustment. These adjustments may be made by the fork lift truck or some. other control device and by the manipulator unit itself. If the fork lift truck has a sufficient tilting motion, tilting cylinder 20 and pivot point 19 will not be required. Furthermore one of the tilting cylinders 24 may be discharged since normal fork lift trucks have good lateral adjustment possibilities.
  • the manipulator When removing slag from the furnace it is very important that the manipulator should be equipped with two cooperating rods with blades which rotate in opposite directions in order to force the slag to pass between the blades of both rods and discharge the slag in a defined direction through the furnace door.
  • the principle implying two cooperating manipulator rods and blades is also of value when additions and slag formers are added, in that these are forced in between the blades of both rods and down into the metal bath so that the reactions occur quickly and the additions are effectively exploited for the desired reactions.
  • the conditions are the same when the slag bath is circulated and thus forced to pass between the blades of both manipulator rods for renewed reaction.
  • a metallurgical stirring device for achieving motion in molten metal or slag which consists essentially in the following combination;
  • a pair of ehocks mounted on said support means, one of said ehocks being directable in different direction than the other;
  • each said bearing housing a shaft
  • each bearing having connected to one end thereof an electric motor driving means
  • each shaft being coated, over that portion thereof remote from said driving means, with a protective coating of ceramic material thereabout;
  • each shaft carrying, at that end thereof remote from said driving means, a ceramic blade, the blades rotating toward each other and coordinated;
  • means including a hydraulic cylinder for varying the distance between the blades as well as the angle between the shafts,
  • a metallurgical stirring device in which the chocks are controlled by means of a pivot arm and a cylinder, in such a way that the shafts of the stirring device are adjustable to various angles of deviation,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Accessories For Mixers (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US787467A 1967-12-29 1968-12-27 Metallurgical manipulator Expired - Lifetime US3588274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE18018/67A SE309050B (de) 1967-12-29 1967-12-29

Publications (1)

Publication Number Publication Date
US3588274A true US3588274A (en) 1971-06-28

Family

ID=20304185

Family Applications (1)

Application Number Title Priority Date Filing Date
US787467A Expired - Lifetime US3588274A (en) 1967-12-29 1968-12-27 Metallurgical manipulator

Country Status (10)

Country Link
US (1) US3588274A (de)
BE (1) BE726162A (de)
DE (1) DE1816038A1 (de)
DK (1) DK120312B (de)
ES (1) ES361877A1 (de)
FR (1) FR1598143A (de)
GB (1) GB1218240A (de)
NL (1) NL6818659A (de)
NO (1) NO120037B (de)
SE (1) SE309050B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5203630A (en) * 1992-02-06 1993-04-20 General Signal Corp. Side entry fluid mixing
US20060067814A1 (en) * 2004-09-30 2006-03-30 Jia-Yeh Wang Cooling fan with anti-friction shaft and bearing set

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3235382A1 (de) * 1982-09-24 1984-03-29 Teppich-Werk Neumünster GmbH, 2350 Neumünster Bodenbelag aus teppichware
KR940003506B1 (ko) * 1989-12-15 1994-04-23 스미도모 게이긴조꾸고오교오 가부시기가이샤 용융금속의 교반장치
CN111780551A (zh) * 2020-06-24 2020-10-16 无锡华能电缆有限公司 一种铝液合金添加及机械搅拌装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5203630A (en) * 1992-02-06 1993-04-20 General Signal Corp. Side entry fluid mixing
US20060067814A1 (en) * 2004-09-30 2006-03-30 Jia-Yeh Wang Cooling fan with anti-friction shaft and bearing set

Also Published As

Publication number Publication date
DE1816038A1 (de) 1969-07-24
GB1218240A (en) 1971-01-06
ES361877A1 (es) 1970-11-16
DK120312B (da) 1971-05-10
SE309050B (de) 1969-03-10
FR1598143A (de) 1970-08-07
NO120037B (de) 1970-08-17
BE726162A (de) 1969-05-29
NL6818659A (de) 1969-07-01

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