EP0011650B1 - Flux powder supplying apparatus for continuous casting - Google Patents

Flux powder supplying apparatus for continuous casting Download PDF

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Publication number
EP0011650B1
EP0011650B1 EP19790900271 EP79900271A EP0011650B1 EP 0011650 B1 EP0011650 B1 EP 0011650B1 EP 19790900271 EP19790900271 EP 19790900271 EP 79900271 A EP79900271 A EP 79900271A EP 0011650 B1 EP0011650 B1 EP 0011650B1
Authority
EP
European Patent Office
Prior art keywords
screw conveyor
flux powder
guide rod
mould
continuous casting
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
Application number
EP19790900271
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0011650A4 (en
EP0011650A1 (en
Inventor
Shinji Nishida
Takashi Otsuka
Mitsukuni Sato
Satoru Kashimoto
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.)
Shinagawa Refractories Co Ltd
Original Assignee
Shinagawa Refractories Co 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 Shinagawa Refractories Co Ltd filed Critical Shinagawa Refractories Co Ltd
Publication of EP0011650A1 publication Critical patent/EP0011650A1/en
Publication of EP0011650A4 publication Critical patent/EP0011650A4/en
Application granted granted Critical
Publication of EP0011650B1 publication Critical patent/EP0011650B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/165—Controlling or regulating processes or operations for the supply of casting powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/108—Feeding additives, powders, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal

Definitions

  • This invention relates to an improvement in a flux powder supplying apparatus for continuous casting, and more particularly to a flux powder supplying apparatus in which it is possible to charge and sprinkle an optimum amount of flux powder onto the surface of molten steel continuously and uniformly when pouring for continuous casting.
  • flux powder is sprinkled onto the surface of the molten steel in the mould, with the principal object of providing lubrication and heat retention of the molten steel.
  • flux powder is charged in such a way that the flux powder is placed above a mould, and the operator charges a suitable amount of flux powder while observing the surface of molten steel when pouring.
  • the working environment is deteriorated to a large extent because of the high temperature and powdery dust generated from the molten steel, with the result that the flux powder is supplied in an uneven distribution (i.e. uneven level).
  • the spring feeder is meant a feeder of known construction, in which a coiled spring is inserted, for almost all its length, in a flexible hose provided beneath a hopper containing flux powder.
  • One end of said spring is directly connected to a motor, the flux powder proceeds following the rotation of said spring operating by means of the rotational, driving force of the motor, and then the flux powder is fed into said flexible hose to be supplied to a discharge port above a mould.
  • Japanese Utility Model Publication No. 106410/77 proposes an automatic supply apparatus of flux powder, in which a supply pipe having an internally mounted screw is provided on the stand and the screw is driven by means of a motor fixed at the rear of said supply pipe.
  • the nozzle opening at the end of the screw makes a back and forth arcuate movement in this apparatus, which is an improvement over what had gone before, still has the disadvantage that flux powder cannot be sprinkled linearly and uniformly.
  • the apparatus is simple but strong in construction and can perform accurate remote control.
  • 1t is of strong construction in which a screw conveyor is provided swingably above the mould from the car, and to effect a linear, reciprocating movement of the nozzle opening at the end of said conveyor an arc-shaped guide and a crank mechanism are provided on the car off the mould.
  • the present apparatus can be easily, automatically operated.
  • the invention relates to a flux powder supplying apparatus for continuous casting of the sort which comprises a movable car arranged near a casting mould, a screw conveyor so mounted on said car through the lower portion of a flux powder supplying hopper as to be swingably movable in a substantially horizontal plane about a substantially vertical axis and a screw driving motor for said screw conveyor.
  • a flux powder supplying apparatus for continuous casting of the sort which comprises a movable car arranged near a casting mould, a screw conveyor so mounted on said car through the lower portion of a flux powder supplying hopper as to be swingably movable in a substantially horizontal plane about a substantially vertical axis and a screw driving motor for said screw conveyor.
  • Such an apparatus is known from Japanese Utility Model Publication No. 106410/77.
  • the invention is characterised in that a crank mechanism is mounted on said car to impart a swinging motion to said screw conveyor, a guide rod is supported by a bracket member on said screw conveyor, one end of said guide rod being connected to a nozzle means defining a nozzle opening, said nozzle means being so mounted to the end of said screw conveyor as to be slidable in the longitudinal direction thereof, and the other end of said guide rod being held in an arc-shaped guide mounted to said car, the guide being so shaped and located that the nozzle means is reciprocally and linearly movable to charge and sprinkle an optimum of flux powder over the width direction of the mould.
  • the uniform sprinkling of flux powder in a suitable amount may be carried out by ensuring that the shape and dimension of said opening in the nozzle means slidably mounted at the end of the screw conveyor are exchangeable in response to the shape and kind of the mould.
  • nozzle openings of several shapes and dimensions may be prepared thereby enabling the possibility of freely mounting a nozzle opening with a desired shape and dimension.
  • the principal mechanism for the reciprocating linear motion of said nozzle is provided on the car and away from the mould, and therefore it is shielded from high temperature, powdery dust, the spray of molten steel, etc.
  • the present apparatus is very effective in view of safety and health, or strength and durability of the main portions of the apparatus, and further an accurate, quick remote control is possible by means of a separately mountable control board.
  • the invention provides a flux powder supplying apparatus for continuous casting, which is very useful in steel making or the like.
  • molten steel 2 in a ladle 1 is received at a tundish 3, and the molten steel 2 is poured into a mould 5 through a tundish nozzle 4 mounted beneath the tundish 3.
  • Flux powder 10 is uniformly supplied onto a surface 6 of the molten steel now poured, by means of a flux powder supplying apparatus 7.
  • WD means the width direction of the mould and TD the thickness direction of the mould.
  • the flux powder supplying apparatus 7 consists of a flux powder supplying hopper 9 placed on a movable car 8, a motor 12 for a screw beneath said hopper 9, and screw conveyors 11 connected directly to said motor 12. Flux powder 10 is fed within the screw conveyors 11, following the rotation of screw.
  • the screw conveyors extend in a direction generally transverse to the width direction of the mould and are adapted to be swingably movable in a direction generally parallel to the width direction.
  • a guide rod 16 extending above a screw conveyor 11 is slidably fitted into a guide 15 consisting of an arc-like groove, said guide being provided on the car 8 towards the rearmost end of said screw conveyor 11, and the other end of said guide rod 16 is mounted to the upper portion of a nozzle means defining a nozzle opening 18 slidably mounted at the end of the screw conveyor 11.
  • a bracket member 26 is fixed near the centre of the screw conveyor 11, the guide rod 16 is inserted slidably through said bracket member 26, by means of a bearing for example, and the nozzle means defining a nozzle opening 18 is supported by the guide rod 16 in such a way that it can move reciprocatingly and linearly in the width direction of the mould.
  • the guide 15 and the guide rod 16 engage with each other through sliding members 21 such as ball bearings.
  • the guide 15 is cut from a metallic material in the shape of an arc-shaped groove, the dimension and shape of which are so designed that it is possible for the nozzle opening 18 to carry out a reciprocal, linear movement.
  • the guide rod 16 smoothly slides within said guide 15 and said sliding motion produces from the swinging movement of the screw conveyors 11 a reciprocating linear movement of the nozzle openings 18 slidably mounted at the ends of the screw conveyors 11.
  • the swinging motion of a screw conveyor 11 is effected by means of the crank mechanism 13 provided on the car 8, and a motor 14 is connected to said crank mechanism 13.
  • the motor 14 is a motor with nonstep transmission capable of normal and reverse rotations for driving the crank mechanism.
  • the rotating speed of said crank mechanism 13 can be optionally controlled, and as a result, it is possible to change freely the speed of the reciprocal, linear movement of said nozzle opening 18.
  • crank bolts 20 it is possible optionally to change and control the strike (the travelling distance) of the nozzle opening 18, to the width of the mould, by setting the crank bolts 20 at desired positions in a groove 22 bored at a crank shaft 23, and fastening said crank bolts 20 to fix them to the crank shaft 23.
  • a fulcrum 17 of the swinging motion is set correspondingly to the centre of the support stand of said flux powder supplying apparatus 7, at the rear portion of said screw conveyor 11.
  • a control board 19 is provided at a suitable position, said board being capable of controlling remotely the motors 12 for the screw conveyor and the motor 14 for the crank mechanism.
  • Fig. 3 and Fig. 4 show the guide mechanism, in which a guide rod 16 is inserted slidably above the screw conveyor 11, through a bracket member 26, and the upper portion of said nozzle opening 18 and the guide rod 16 are fixed at the end of said screw conveyor 11 whereby the nozzle opening 18 is slidable on the screw conveyor.
  • the other end of the guide rod 16 is inserted, to be slidable, into the guide 15 forming an arc-like groove, through sliding members 21 such as ball bearings, as shown in Fig. 3 for example, and the rearmost portion of the screw conveyor 11 is connected to a motor 12 thereby to rotate the screw while feeding the flux powder charged from the flux powder supply hopper 9.
  • Fig. 5 is an explanatory view of the construction of said crank mechanism 13 and said screw conveyors 11. Between two of the screw conveyors 11 (two or more can be arranged according to the operational conditions at the scene of casting) there are provided the crank mechanism 13 and the crank motor 14.
  • Said crank mechanism 13 is of the following construction.
  • a crank rod 24 is connected through a pin 25 to a connecting member 27 fixed to the side face of the screw conveyor 11, and by means of crank bolt 20 the crank shafts 23 and the crank rod 24 are rotatably connected together.
  • Fig. 6 shows the crank shafts 23 only, viewed from an arrow a of Fig. 5, and it shows a mechanism capable of controlling, to optional and optimum set value, the stroke of said crank mechanism, in other words the stroke (the distance of reciprocating, linear motion) of the nozzle opening 18 slidably fitted at the end of the screw conveyor 11.
  • crank bolt 20 In order to set said stroke at the minimum stroke (MI) the crank bolt 20 is fixed at the position A as shown, in a groove 22 cut in the crank shaft 23, and if the setting to the maximum stroke (MX) is desired, the crank bolt 20 may be fixed at the position B, for example by means of nut.
  • the ranges of the maximum stroke (MX) and the minimum stroke (MI) are determined by setting the optional stroke between point A and point B by predetermining the length of the groove 22.
  • the nozzle openings 18 for which shape and dimension have been previously set, depending on the kind and size of the mould 5; by controlling the rotational speed of the screw motors 12 and the crank motor 14, it is possible to control the amount of flux powder supplied and the reciprocating linear motion stroke of the nozzle opening over a wide range; and it is possible to sprinkle a suitable amount of flux powder to the surface of molten steel in the mould, uniformly, efficiently, accurately and as desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
EP19790900271 1978-03-09 1979-10-09 Flux powder supplying apparatus for continuous casting Expired EP0011650B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP29077/78 1978-03-09
JP2907778U JPS5724433Y2 (enrdf_load_stackoverflow) 1978-03-09 1978-03-09

Publications (3)

Publication Number Publication Date
EP0011650A1 EP0011650A1 (en) 1980-06-11
EP0011650A4 EP0011650A4 (en) 1980-07-17
EP0011650B1 true EP0011650B1 (en) 1983-11-30

Family

ID=12266273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790900271 Expired EP0011650B1 (en) 1978-03-09 1979-10-09 Flux powder supplying apparatus for continuous casting

Country Status (4)

Country Link
EP (1) EP0011650B1 (enrdf_load_stackoverflow)
JP (1) JPS5724433Y2 (enrdf_load_stackoverflow)
DE (1) DE2966437D1 (enrdf_load_stackoverflow)
WO (1) WO1979000730A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3562995D1 (en) * 1985-02-27 1988-07-07 Kawasaki Heavy Ind Ltd Apparatus for a continuous casting facility
CN100457325C (zh) * 2007-06-16 2009-02-04 姜虹 大断面结晶器自动加渣装置
CN102699296B (zh) * 2012-05-02 2014-04-16 武汉科技大学 一种用于连铸结晶器的自动加渣机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411566A (en) * 1967-02-20 1968-11-19 Astrov Evgeny Ivanovitch Device for supplying powdered material into a mold of a continuous casting machine
CH559075A5 (enrdf_load_stackoverflow) * 1973-05-30 1975-02-28 Concast Ag
CH595161A5 (enrdf_load_stackoverflow) * 1975-11-27 1978-01-31 Concast Ag
CH623758A5 (en) * 1977-11-04 1981-06-30 Concast Ag Apparatus for feeding casting powder into a mould of a continuous casting installation for steel

Also Published As

Publication number Publication date
EP0011650A4 (en) 1980-07-17
JPS5724433Y2 (enrdf_load_stackoverflow) 1982-05-27
DE2966437D1 (en) 1984-01-05
JPS54133124U (enrdf_load_stackoverflow) 1979-09-14
EP0011650A1 (en) 1980-06-11
WO1979000730A1 (en) 1979-10-04

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