US3467369A - Apparatus for adjusting a tilt-furnace - Google Patents

Apparatus for adjusting a tilt-furnace Download PDF

Info

Publication number
US3467369A
US3467369A US554723A US3467369DA US3467369A US 3467369 A US3467369 A US 3467369A US 554723 A US554723 A US 554723A US 3467369D A US3467369D A US 3467369DA US 3467369 A US3467369 A US 3467369A
Authority
US
United States
Prior art keywords
rollers
furnace
furnace body
runners
adjusted
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
US554723A
Other languages
English (en)
Inventor
Shigenobu Shindo
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.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
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 Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Application granted granted Critical
Publication of US3467369A publication Critical patent/US3467369A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/06—Constructional features of mixers for pig-iron

Definitions

  • FIG.I APPARATUS FOR ADJUSTING A TILT-FURNACE 2 Sheets-Shem l
  • FIG.5A Flsfss FIG.5C
  • FIG.6 APPARATUS FOR ADJUSTING A TILTFURNACE 2 Sheets- Shem 2 Filed June 2, 1966 FIG.6
  • the present invention relates to furnaces.
  • the present invention relates to tiltfurnaces of the type which have 'a hollow generally horizontally extending furnace body which is capable of tilting about a substantially horizontal axis so that when tilted in one direction slag can be poured out of the furnace body while when tilted in an opposite direction molten pig iron or the like can be poured from the other side of the furnace body.
  • furnaces of this type when adapted to handle a load of 2000 tons, for example, must in and of themselves weigh on the order of 700 tons, so that the loads with which the rollers are stressed are so tremendous that the furnace is operated without any particular steps being taken to correct faults of the above type.
  • full effective use of a furnace cannot be achieved, and in those cases where the nature of the operations is such that any accidents due to mechanical damaging of furnace parts are absolutely impermissible, adjustments are made only with the utmost difficulty.
  • At least some of the rollers which support the furnace body for tilting movement are operatively connected with a plurality of bearing means which are capable of adjusting the positions of the roller axes so that by setting the roller axes at preselected angles it is possible through the adjusted rollers to provide during the tilting of the furnace components of force which will shift the furnace body to correct its position.
  • FIG. 1 is a schematic transverse sectional elevation of a tilt-furnace, FIG. 1 showing the structure for tilting the furnace as well as for supporting the furnace for tilting movement;
  • FIG. 2 is a side view of the structure of FIG. 1;
  • FIG. 3 shows in fragmentary end and longitudinal sectiolrlial elevations conventional bearing structure for a ro er
  • FIG. 4 shows in fragmentary end and longitudinal sections one possible embodiment of a structure according to the present invention
  • FIGS. 5A, 5B, and 5C are schematic illustrations showing positions which may be given to the rollers in accordance with the invention.
  • FIG. 6 shows the furnace in a transverse section similar to FIG. 1 at one end position of tilting movement
  • FIG. 7 shows the furnace of FIG. 6 at an opposite end position of tilting movement
  • FIGS. 8A, 8B, and 8C schematically illustrate various possibilities in the adjustments which can be achieved with the present invention.
  • the tilt-furnace illustrated therein includes a furnace body 1 provided with a discharge spout 11 through which molten pig iron can be poured from one side of the furnace body 1, this furnace body 1 having at its opposite side a slag discharge spout 12.
  • the furnace body 1 is supported for tilting movement by a rocker assembly which includes, in the illustrated example, a pair of upper runners 2 which are respectively fixed to the underside of the furnace body 1 and which have downwardly directed curved runner surfaces each of which extends along a circle whose axis coincides with the turning axis of the furnace.
  • the rocker assembly includes beside the upper pair of runners 2 a lower pair of runners 5 which may be stationary and which have upwardly directed runner surfaces of the same curvature as the downwardly directed surfaces of the runners 2 and spaced therefrom to define therewith elongated arcuate gaps which extend along circles whose centers are in the turning axis of the furnace body.
  • each gap Situated in each gap is a row of mutually spaced rollers 3 in rolling engagement with the curved runner surfaces which define the gap.
  • the rollers are each provided at their ends with journals received in bearings carried by a pair of side bars 4 respectively situated along opposite sides of each row of rollers 3.
  • a rack 6 is pivotally connected at one end by a pivot pin 9 to a projecting lug 8 which is fixed to and projects from the furnace body in the manner shown in dot-dash lines in FIG. 1, and a pinion 7 meshes with the rack 6 and is driven by a furnace-tilting motor through a suitable reduction gearing or the like, so that in this way the furnace body can be tilted in opposed directions to selectively provide discharge of molten metal or slag.
  • FIG. 3 shows a conventional bearing structure for a journal at an end of a roller 3, it will be seen that each roller 3 has at each of its endS a journal 3 received in a bearing carried by one of the side bars 4.
  • the rollers 3 are not only capable of rotating with respect to the side bars 4, but these side bars in addition act to maintain the required spacing between the rollers while they roll along the runners 2 and 5.
  • the roller axes will at all time be maintained in given positions which ideally should extend parallel to the tilting axis of the furnace but which by reason of the above factors deviate in practice considerably from this ideal, giving rise to the above-discussed faults.
  • the furnace With a structure of this type it is possible to tilt the furnace between the positions shown in FIGS. 6 and 7, one of these positions being that shown in FIG. 7 where the furnace is tilted through an angle of approximately 50 to a maximum tilted position providing for discharge of molten metal through the spout 11, while in the opposite direction of tilt it is possible to bring the furnace to the position shown in FIG. 6 where it is tilted through an angle of about to bring about discharge of slag from the spout 12.
  • the length of the runners 5 is such that in each of the end positions several rollers at the end of each row of rollers project beyond the runners 5 and are in a floating state, in that they are unsupported at their undersides.
  • the end position of FIG. 6 there are three rollers 3 at the right end of each row which are situated beyond the lower runners 5, while in the end position of FIG. 7 there are five rollers 3 at the other end of each row of rollers situated beyond the runner 5.
  • each adjustable roller 3 at least, a pair of bearing means cooperating with its journals, and one of these bearing means is shown in FIG. 4.
  • FIG. 4 it will be seen that the journal 3 is received in a bearing means 10 carried by the side bar 4 and having an outer bearing member provided with an inner bearing surface which forms part of a sphere.
  • the journal 3 itself is surrounded and supported for rotary movement by a bearing member 13 which has an exterior bearing surface 13 forming part of the same sphere as that of the inner surface of the outer bearing member and slidably engaging the latter inner surface.
  • FIGS. SA-SC it is possible with the structure of the invention to provide an arrangement of rollers, for one or both rows, as shown at FIG. 5A in which all of the rollers have parallel axes.
  • FIG. 5B it is possible to provide an adjustment as shown at FIG. 5B according to which some rollers remain parallel to the furnace axis while others are inclined with respect thereto, and it is even possible to provide an arrangement as shown at FIG. 5C where successive rollers have opposed angular directions.
  • the faulty positioning of the furnace body has been found to be the result of dimensional errors in the manufacture of the parts such as the rollers, the runners, the furnace body, etc., as well as departures from ideally adjusted positions due to wearing of the parts, due to sliding rather than rolling contact therebetween, as well as to unbalanced forces, errors in installation, and displacements resulting from repeated expansion and contraction brought about by temperature changes. Lack of uniformity in temperature variations throughout the furnace body will also contribute to faulty positioning of the furnace, and once an error occurs it will shift from one part to another part of the furnace, although gradually, during the repetitious tilting movements of the furnace.
  • the furnace body is tilted, in accordance with the method of the invention, to one of the end positions shown in FIGS. 6 and 7 either when the furnace is empty or when the quantity of molten material therein is relatively small, so that under these conditions the floating state of the rollers situated beyond the lower runners is enhanced.
  • These floating rollers are adjusted in the manner described above, for example by localized tapping forces applied against selected areas of the inner bearing members 13 to tilt them with respect to the outer bearing members and thus provide a slight change in the direction in which the axis of the adjusted roller extends.
  • FIG. 8A it will be seen that the group I of the two rows of rollers 3 are angularly adjusted in the manner indicated.
  • rollers When the rows of rollers are advanced in the direction of the arrow (a) shown in FIG. 8A, they will tend to roll in the direction of the arrow (b) of FIG. 8A, with the result that there is a component of force acting in the direction of the arrow (c) tending to displace the tilted rollers to the left, as viewed in FIG. 8A. If only a relatively small number of rollers have their positions adjusted in this way it may well be that the remaining rollers will dominate and the adjustment will be extremely small, if any. On the other hand, if a relatively large number of rollers is adjusted, they will produce a shift in the direction of the arrow (c). During tilting of the furnace body in the opposite direction the rollers will automatically assume their initial positions where their axes extend parallel to the furnace axis.
  • the apparatus of the invention it becomes possible to easily correct deviations resulting from operation of the furnace, and in addition the apparatus of the invention requires no troublesome procedures such as removal of firebrick, and the like.
  • the adjustments are brought about during the normal tilting movements of the furnace, and the required adjustment is achieved in an exceedingly simple way very easily and in an extremely short time.
  • the construction required for the invention is quite simple, all that is required being the bearing structure such as that shown in FIG. 4, the structure of the invention is exceedingly inexpensive. Therefore, it is apparent that the apparatus of the invention is of considerable advantage to the operation of tilt-furnaces of the above type.
  • a furnace body having an underside, a rocker assembly supporting said furnace body for tilting movement, said rocker assembly including an upper pair of runners fixed to said furnace body at its underside and having downwardly directed curved runner surfaces directed away from said furnace body, a lower pair of runners situated beneath and spaced from said upper pair of runners, respectively, and having upwardly directed curved runner surfaces of the same curvature as said downwardly directed curved runner surfaces of said upper pair of runners and uniformly spaced therefrom to define therewith a pair of elongated curved gaps of uniform width, a row of mutually spaced rollers situated in each of said gaps, said rollers having rolling contact with said runner surfaces during tilting of said furnace body, and each roller having a pair of end journals, a pair of side bars extending along each row of rollers at opposite sides thereof and a plurality of bearings carried by each of said side bars and respectively receiving end journals of said rollers, said plurality of bearings connecting said rollers -to said bars for rotary
  • each of said means which is operatively connected to a roller for adjusting the axis thereof includes an outer bearing member carried by one of said side bars and having an inner bearing surface forming part of a sphere and an inner bearing member surrounding and supporting a roller journal and having an outer bearing surface forming part of the same sphere as that of said outer bearing member and slidably engaging said inner bearing surface thereof, so that by shifting said inner bearing member with respect to said outer bearing member the position of the roller axis can be adjusted.
  • each means which is operatively connected to a journal for adjusting the position of the roller axis is capable of providing a roller axis adjustment through an angular distance of 1 or 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Tunnel Furnaces (AREA)
US554723A 1965-06-08 1966-06-02 Apparatus for adjusting a tilt-furnace Expired - Lifetime US3467369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3353365 1965-06-08

Publications (1)

Publication Number Publication Date
US3467369A true US3467369A (en) 1969-09-16

Family

ID=12389173

Family Applications (1)

Application Number Title Priority Date Filing Date
US554723A Expired - Lifetime US3467369A (en) 1965-06-08 1966-06-02 Apparatus for adjusting a tilt-furnace

Country Status (3)

Country Link
US (1) US3467369A (OSRAM)
DE (1) DE1508227A1 (OSRAM)
GB (1) GB1154592A (OSRAM)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396181A (en) * 1980-11-19 1983-08-02 Inspiration Consolidated Copper Company Converter for refining liquid metal
US4487399A (en) * 1980-11-19 1984-12-11 Inspiration Consolidated Copper Company Converter for refining liquid metal
US4534571A (en) * 1984-03-19 1985-08-13 Inspiration Consolidated Copper Company Circumferential sealing assembly
US5916471A (en) * 1998-11-10 1999-06-29 North American Refractories Co. Rotary socket taphole assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1036500A (en) * 1911-02-28 1912-08-20 Albert B Frenier Metallurgical furnace.
US1972679A (en) * 1932-05-31 1934-09-04 Robert W Cousins Safety device for hot metal mixers
US2599158A (en) * 1948-12-02 1952-06-03 Brassert & Co Cylindrical converter
DE1159973B (de) * 1959-11-27 1963-12-27 Demag Ag Rundherdmischer fuer fluessiges Roheisen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1036500A (en) * 1911-02-28 1912-08-20 Albert B Frenier Metallurgical furnace.
US1972679A (en) * 1932-05-31 1934-09-04 Robert W Cousins Safety device for hot metal mixers
US2599158A (en) * 1948-12-02 1952-06-03 Brassert & Co Cylindrical converter
DE1159973B (de) * 1959-11-27 1963-12-27 Demag Ag Rundherdmischer fuer fluessiges Roheisen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396181A (en) * 1980-11-19 1983-08-02 Inspiration Consolidated Copper Company Converter for refining liquid metal
US4487399A (en) * 1980-11-19 1984-12-11 Inspiration Consolidated Copper Company Converter for refining liquid metal
US4534571A (en) * 1984-03-19 1985-08-13 Inspiration Consolidated Copper Company Circumferential sealing assembly
US5916471A (en) * 1998-11-10 1999-06-29 North American Refractories Co. Rotary socket taphole assembly

Also Published As

Publication number Publication date
GB1154592A (en) 1969-06-11
DE1508227A1 (OSRAM) 1970-07-30

Similar Documents

Publication Publication Date Title
US3467369A (en) Apparatus for adjusting a tilt-furnace
US2858122A (en) Conveying apparatus
US3494602A (en) Method for adjusting a tilt-furnace
US2949147A (en) Roller leveler with driven backup rolls
RU2428276C2 (ru) Ленточная литейная машина, имеющая регулируемую длину контакта с отливаемой металлической заготовкой
US4468781A (en) Tiltable arc furnace
US3543555A (en) Form changing device for continuous casting
US2175834A (en) Heat treating furnace
US921165A (en) Transfer mechanism.
US3367647A (en) Trunnion ring for tiltable convertor
US2708107A (en) Work conveyor mechanism for heat treating furnaces
JPS6160245A (ja) 複ベルト式連鋳鋳型の鋳込みベルト用ガイド装置
US4116262A (en) Arcuate supporting and guiding construction for continuously cast strands
AU592928B2 (en) Rolling track for a rotary hopper
US2619030A (en) Adjustable stamping machine
US1642834A (en) Means for supporting rotary cylinders
US4344550A (en) Self-adjusting arrangement for refractory plates of slide gate mechanism
DE7046582U (de) Stranggiessvorrichtung zum kontinuierlichen giessen von schmelzfluessigen metallen
US1583486A (en) Pipe-conveying mechanism
US1061280A (en) Ladle-runner.
US3236396A (en) Workpiece manipulator
JPS5849323B2 (ja) イチコテイ ノ アツエンチユウシンオユウスル タンセンアツエンソウチ
IL25865A (en) Standard continuous casting device
DE673074C (de) Gewoelbedecke fuer kippbare OEfen, z.B. Siemens-Martin-OEfen
DE2604723C2 (de) Metallurgischer Ofen