EP0446734A2 - Vorrichtung zur Aufgabe und Verteilung von pulverförmingen oder körnigen Rohstoffen - Google Patents

Vorrichtung zur Aufgabe und Verteilung von pulverförmingen oder körnigen Rohstoffen Download PDF

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Publication number
EP0446734A2
EP0446734A2 EP91103164A EP91103164A EP0446734A2 EP 0446734 A2 EP0446734 A2 EP 0446734A2 EP 91103164 A EP91103164 A EP 91103164A EP 91103164 A EP91103164 A EP 91103164A EP 0446734 A2 EP0446734 A2 EP 0446734A2
Authority
EP
European Patent Office
Prior art keywords
distribution
distributing
chute
rotary part
distribution roller
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.)
Withdrawn
Application number
EP91103164A
Other languages
English (en)
French (fr)
Other versions
EP0446734A3 (en
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.)
Repa International Ltd
Original Assignee
Repa International 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 Repa International Ltd filed Critical Repa International Ltd
Publication of EP0446734A2 publication Critical patent/EP0446734A2/de
Publication of EP0446734A3 publication Critical patent/EP0446734A3/fr
Withdrawn legal-status Critical Current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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/108—Feeding additives, powders, or the like

Definitions

  • the present invention relates to an apparatus for distributing and distributing pulverulent or granular materials, in particular for the uniform distribution of small quantities of these materials over a circular surface.
  • a device for uniform distribution and distribution of powdery or granular materials in bulk on a circular surface has been described in Belgian patent application No. 89 003 52 filed in the name of the same holder.
  • the device described in this Belgian patent application comprises a rotary part and a fixed part, the rotary part being formed by a distribution tank which is suspended from a shaft provided with a control device, the bottom of said tank being formed by a series of tanks or tubs arranged around the shaft, while the fixed part is provided with a cover which carries on its underside at least one scraper.
  • This type of device is used in particular for depositing fairly large quantities of an insulating powder in a homogeneous and uniform manner on the surface of a liquid metal in a ladle or in a casting mold.
  • deposition and uniform distribution are very satisfactory with the device described in Belgian patent application No. 89 003 52 in all cases where large quantities of powdery or grainy raw materials and also in case the diameter of the bags or molds is relatively large. It has been found that for the distribution of relatively small quantities, this device is impractical, too bulky and heavy and no longer guarantees the desired uniform distribution.
  • the object of the present invention is to provide an apparatus for distributing and distributing pulverulent or granular materials, in particular on the surface of a liquid metal which does not have the drawbacks of the device described above when it comes to depositing and to distribute small quantities of materials and which, moreover, has the advantage of being lighter, and therefore less expensive.
  • a major advantage achievable using the apparatus according to the invention lies in the fact that it allows the uniform distribution of small diameter granules (8 mm and less) and this for small quantities.
  • the distribution apparatus 1 is installed on a pocket of liquid steel 12, the figure of which only shows schematically the upper edge with the walls 13 made of bricks or other refractory lining.
  • the device 1 essentially comprises a fixed part comprising a tubular frame 7 attached to a metal construction 14 indicated briefly and the details of which are not shown in FIG. 1 since they can change from one application to another.
  • the chassis 7 supports the bearings 15 and 16 necessary to hold a control shaft 17 which passes through it and to which the mobile or rotary part of the distribution apparatus 1 according to the invention is fixed.
  • the fixed part of the device 1 also includes a fixed feed chute 18 which is also supported by the metal construction 14.
  • the control shaft 17 is actuated by means of an electric motor 6 coupled to the shaft 7 by a reduction gear 19.
  • a distribution and distribution chute 4 is integrally attached by appropriate means 20 to the control shaft 17.
  • the chute 4 includes a hopper 2, a conical distribution roller 3 and a refractory panel 5 which closes the bottom of the chute dispenser 4 while leaving adequate openings 21 below the distribution roller 3.
  • the panel 5 of refractory material protects the device 1 from the heat given off by the molten metal in the pocket 12.
  • the hopper 2 just like the distribution roller 3 extend only on one side of the shaft 17 and only on a part of the distribution chute 4. Their respective weights are compensated by a counterweight 10 fixed on the chute 4 on the opposite side of the hopper 2 seen in relation to the control shaft 17, in order to guarantee a regular and smooth rotation of the distribution chute 4.
  • the distribution roller 3 is supported by an intermediate axis 22 which, for its part, is housed in bearings 23, 23 ', 23''and23''' fixed to the frame of the distribution chute 4.
  • the distribution roller 3 has a conical or frustoconical shape as emerges from Figure 1 and is grooved as can be seen in Figure 2.
  • the grooves 25 are in the longitudinal direction.
  • the large base of the conical shape of the roller 3 is located on the outside of the chute 4 while the small base is on the side of the axis of rotation.
  • the distribution roller 3 is rotated by its axis 22 which is itself rotated by means of a coupling 21 by a wheel 24 driven by a chain.
  • a mechanism for controlling and transmitting the rotation comprises a bevel gear 8 fixed integrally to the chassis 7 which attacks a rotary gear fixed by means of an axis and bearings to the frame of the chute 4, said axis actuating a wheel 9 which drives the chain mentioned above.
  • the rotary part of the device according to the invention is positioned so that the rotary hopper 2 is located just below the filling station, that is to say ie of the fixed feed chute 18. In this stationary position, the hopper 2 is filled to its maximum level.
  • the quantity of granular or pulverulent materials that the hopper 2 can contain is generally chosen so that this quantity is twice the quantity to be distributed in one operation on the metal bath.
  • the mobile or rotary part of the device 1 After filling the rotary hopper 2, the mobile or rotary part of the device 1 is set in motion by the control shaft 17 driven by the gear motor 6, 19.
  • the setting in rotation of the distribution chute 4 necessarily also confers a rotational movement on the conical distribution roller 3 by the means described in detail above.
  • the material poured from the hopper 2 onto the roller 3 is distributed as far as possible uniformly over the entire surface of the metal bath.
  • the minimum quantity of material to be distributed corresponds to one complete rotation of the distribution chute.
  • This minimum quantity can for example be 20 kg of a material. If the layer to be spread on the liquid must be greater than this minimum quantity, it is necessary to rotate the chute more than one revolution but each time a full revolution to spread in this way multiples of the minimum quantity for which l device has been dimensioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP19910103164 1990-03-12 1991-03-02 Device for distributing and spreading pulverulent or granular raw materials Withdrawn EP0446734A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU87697 1990-03-12
LU87697A LU87697A1 (fr) 1990-03-12 1990-03-12 Appareil de distribution et de repartition de matieres premieres pulverulentes ou granuleuses

Publications (2)

Publication Number Publication Date
EP0446734A2 true EP0446734A2 (de) 1991-09-18
EP0446734A3 EP0446734A3 (en) 1991-10-30

Family

ID=19731224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910103164 Withdrawn EP0446734A3 (en) 1990-03-12 1991-03-02 Device for distributing and spreading pulverulent or granular raw materials

Country Status (2)

Country Link
EP (1) EP0446734A3 (de)
LU (1) LU87697A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2172657C1 (ru) * 1999-12-14 2001-08-27 Открытое акционерное общество "Новолипецкий металлургический комбинат" Устройство подачи сыпучих материалов для обработки жидкого металла при его непрерывной разливке
CN111873414A (zh) * 2019-05-03 2020-11-03 罗天珍 一种三维打印机专用狭缝自封铺粉装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8101242L (sv) * 1981-02-26 1982-08-27 Scandinavian Lancers Forfarande och anordning for spridning av teckmedel
JPS6417331U (de) * 1987-07-21 1989-01-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2172657C1 (ru) * 1999-12-14 2001-08-27 Открытое акционерное общество "Новолипецкий металлургический комбинат" Устройство подачи сыпучих материалов для обработки жидкого металла при его непрерывной разливке
CN111873414A (zh) * 2019-05-03 2020-11-03 罗天珍 一种三维打印机专用狭缝自封铺粉装置

Also Published As

Publication number Publication date
EP0446734A3 (en) 1991-10-30
LU87697A1 (fr) 1991-10-08

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