EP0446734A2 - Device for distributing and spreading pulverulent or granular raw materials - Google Patents

Device for distributing and spreading pulverulent or granular raw materials Download PDF

Info

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Withdrawn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
German (de)
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/en
Publication of EP0446734A3 publication Critical patent/EP0446734A3/en
Withdrawn legal-status Critical Current

Links

Images

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)

Abstract

Device for distributing and spreading pulverulent or granular materials over a circular surface by means of a distribution chute (4) comprising a hopper (2) for receiving the materials and a rotating spreading roller (3). <IMAGE>

Description

La présente invention concerne un appareil de distribution et de répartition de matières pulvérulentes ou granuleuses, notamment pour la répartition uniforme de faibles quantités de ces matières sur une surface circulaire.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.

Un dispositif de distribution et de répartition uniforme de matériaux pulvérulents ou granuleux en vrac sur une surface circulaire a été décrit dans la demande de brevet belge No. 89 003 52 déposée au nom du même titulaire. Le dispositif décrit dans cette demande de brevet belge comprend une partie rotative et une partie fixe, la partie rotative étant formée par un réservoir de distribution qui est suspendu à un arbre muni d'un dispositif de commande, le fond dudit réservoir étant formé par une série de cuves ou bacs aménagés autour de l'arbre, tandis que la partie fixe est munie d'un couvercle qui porte sur sa face inférieure au moins un racloir.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.

Ce genre de dispositif est notamment utilisé pour déposer de façon homogène et uniforme des quantités assez importantes d'une poudre isolante sur la surface d'un métal liquide se trouvant dans une poche ou dans un moule de coulée. Bien que le dépôt et la répartition uniforme se fassent de façon très satisfaisante avec le dispositif décrit dans la demande de brevet belge No. 89 003 52 dans tous les cas où il faut traiter des grandes quantités de matières premières pulvérulentes ou granuleuses et également au cas où le diamètre des poches ou moules est relativement grand. On a constaté que pour la répartition de quantités relativement faibles, ce dispositif est peu pratique, trop encombrant et lourd et ne garantit plus la distribution uniforme souhaitée.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. Although the 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.

Le but de la présente invention est de prévoir un appareil de distribution et de répartition de matières pulvérulentes ou granuleuses, notamment sur la surface d'un métal liquide qui ne présente pas les inconvénients du dispositif décrit ci-avant quand il s'agit de déposer et de répartir de faibles quantités de matières et qui, en outre, présente l'avantage d'être moins lourd, donc moins onéreux.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.

Ce but est atteint grâce à l'appareil de distribution et de répartition tel qu'il est caractérisé dans la revendication 1. Des variantes d'exécution préférentielles sont décrites dans les revendications dépendantes.This object is achieved thanks to the distribution and distribution apparatus as characterized in claim 1. Preferential alternative embodiments are described in the dependent claims.

Un avantage majeur réalisable à l'aide de l'appareil selon l'invention réside dans le fait qu'il permet la répartition uniforme de granulés de faible diamètre (8 mm et inférieur) et ceci pour de faibles quantités.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.

D'autres particularités et caractéristiques ressortiront de la description détaillée d'un mode de réalisation de l'appareil suivant l'invention en se référant aux dessins annexés dans lesquels :

  • La figure 1 montre en coupe une vue de face de l'appareil, suivant l'invention, installé sur une poche d'acier liquide
  • La figure 2 est une coupe latérale suivant la ligne A-A de la figure 1
Other particularities and characteristics will emerge from the detailed description of an embodiment of the apparatus according to the invention with reference to the appended drawings in which:
  • Figure 1 shows in section a front view of the apparatus, according to the invention, installed on a pocket of liquid steel
  • Figure 2 is a side section along the line AA in Figure 1

Dans la figure 1, l'appareil 1 de répartition suivant l'invention est installé sur une poche d'acier liquide 12 dont la figure ne montre que schématiquement le bord supérieur avec les parois 13 en briques ou autre revêtement réfractaire. L'appareil 1 comprend essentiellement une partie fixe comprenant un châssis tubulaire 7 attaché à une construction métallique 14 indiquée sommairement et dont les détails ne sont pas montrés dans la figure 1 puisqu'ils peuvent changer d'une application à l'autre. Le châssis 7 supporte les paliers 15 et 16 nécessaires pour tenir un arbre de commande 17 qui le traverse et auquel est fixée la partie mobile ou rotative de l'appareil de répartition 1 suivant l'invention. La partie fixe de l'appareil 1 comprend également une goulotte d'alimentation fixe 18 qui est également supportée par la construction métallique 14.In FIG. 1, the distribution apparatus 1 according to the invention 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.

L'arbre de commande 17 est actionné moyennant un moteur électrique 6 accouplé à l'arbre 7 par un réducteur 19. Une goulotte 4 de distribution et de répartition est solidairement attachée par des moyens appropriés 20 à l'arbre de commande 17. La goulotte 4 comprend une trémie 2, un rouleau conique 3 de répartition et un panneau réfractaire 5 qui ferme le fond de la goulotte distributrice 4 tout en laissant des ouvertures 21 adéquates en-dessous du rouleau de répartition 3. Le panneau 5 en matériel réfractaire protège l'appareil 1 de la chaleur dégagée par le métal en fusion dans la poche 12. Comme il ressort des figures, la trémie 2 tout comme le rouleau de répartition 3 ne s'étendent que sur un côté de l'arbre 17 et que sur une partie de la goulotte distributrice 4. Leurs poids respectifs sont compensés par un contrepoids 10 fixé sur la goulotte 4 au côté opposé de la trémie 2 vue par rapport à l'arbre de commande 17, afin de garantir une rotation régulière et sans à-coups de la goulotte de distribution 4.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. As can be seen from the figures, 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.

Le rouleau de répartition 3 est supporté par un axe intermédiaire 22 qui, lui, est logé dans des paliers 23, 23', 23'' et 23''' fixés au cadre de la goulotte distributrice 4. Le rouleau de répartition 3 a une forme conique ou tronconique comme il ressort de la figure 1 et est rainuré comme on peut le voir sur la figure 2. Les rainures 25 sont dans le sens longitudinal. La grande base de la forme conique du rouleau 3 se trouve sur la partie extérieure de la goulotte 4 tandis que la petite base est du côté de l'axe de rotation. Le rouleau de répartition 3 est mis en mouvement de rotation par son axe 22 qui, lui, est mis en rotation moyennant un accouplement 21 par une roue 24 entraînée par une chaine. Un mécanisme de commande et de transmission de la rotation comprend un pignon conique 8 fixé solidairement au châssis 7 qui attaque un engrenage rotatif fixé moyennant un axe et des paliers au cadre de la goulotte 4, ledit axe actionnant une roue 9 qui entraîne la chaîne ci-avant mentionnée.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.

Dans la position de repos ou de démarrage du processus de distribution, la partie rotative de l'appareil suivant l'invention est positionnée de façon à ce que la trémie tournante 2 se trouve juste en dessous de la station de remplissage c'est-à-dire de la goulotte d'alimentation fixe 18. Dans cette position stationnaire, la trémie 2 est remplie jusqu'à son niveau maximum. La quantité de matières granuleuses ou pulvérulentes que la trémie 2 peut contenir est généralement choisie de façon à ce que cette quantité soit le double de la quantité à répartir en une opération sur le bain métallique.In the position of rest or start of the dispensing process, 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.

Après remplissage de la trémie rotative 2, la partie mobile ou rotative de l'appareil 1 est mise en mouvement par l'arbre de commande 17 entraîné par le moteur-réducteur 6, 19. Comme il apparait sur la figure 1, la mise en rotation de la goulotte de distribution 4 confère nécessairement également un mouvement de rotation au rouleau conique de répartition 3 par les moyens décrits en détails ci-avant. Par la rotation simultanée de la goulotte 4, au-dessus de la poche d'acier et du rouleau de répartition 3 et par le fait que ce dernier présente une forme conique (ou plutôt tronconique) ayant sa grande base du côté de la périphérie du cercle de rotation, la matière déversée par la trémie 2 sur le rouleau 3 est distribuée autant que possible de façon uniforme sur toute la surface du bain métallique. Dans un mode de réalisation pratique, la quantité minimum de matière à répartir correspond à un tour de rotation complet de la goulotte de distribution. Cette quantité minimum peut par exemple être de 20 kg d'une matière. Si la couche à répandre sur le liquide doit être supérieure à cette quantité minimum, il y a lieu de faire tourner la goulotte plus d'un tour mais chaque fois un tour complet pour répandre de cette façon des multiples de la quantité minimum pour laquelle l'appareil a été dimensionné.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. As it appears in FIG. 1, 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. By the simultaneous rotation of the chute 4, above the steel pocket and the distribution roller 3 and by the fact that the latter has a conical shape (or rather frustoconical) having its large base on the side of the periphery of the circle of rotation, 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. In a practical embodiment, 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.

Claims (7)

Appareil de distribution et de répartition de matières pulvérulentes ou granuleuses sur une surface circulaire, notamment sur la surface d'un bain métallique, comprenant une partie fixe supportant une partie rotative pour distribuer et répartir lesdites matières, caractérisé en ce que la partie rotative est constituée d'une goulotte de distribution (4) comprenant au moins une trémie (2) pour recevoir les matières et au moins un rouleau tournant de répartition (3) aménagé en-dessous de la trémie (3).Apparatus for distributing and distributing powdery or granular materials on a circular surface, in particular on the surface of a metal bath, comprising a fixed part supporting a rotary part for distributing and distributing said materials, characterized in that the rotary part consists a distribution chute (4) comprising at least one hopper (2) for receiving the materials and at least one rotating distribution roller (3) arranged below the hopper (3). Appareil selon la revendication 1, caractérisé en ce que le fond de la goulotte de distribution (4) est fermé par un panneau réfractaire (5) ayant des ouvertures (21) situées en-dessous du rouleau de répartition (3).Apparatus according to claim 1, characterized in that the bottom of the distribution chute (4) is closed by a refractory panel (5) having openings (21) located below the distribution roller (3). Appareil selon la revendication 1 ou 2, caractérisé en ce que le rouleau de répartition (3) comprend des rainures aménagées (25) dans le sens longitudinal dans sa surface latéral.Apparatus according to claim 1 or 2, characterized in that the distribution roller (3) has grooves (25) arranged in the longitudinal direction in its lateral surface. Appareil selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le rouleau de répartition (3) a une forme conique ou tronconique avec la grande base se trouvant vers la partie extérieure de la goulotte de distribution (4).Apparatus according to any one of claims 1 to 3, characterized in that the distribution roller (3) has a conical or frustoconical shape with the large base lying towards the outside of the distribution chute (4). Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie fixe comprend un châssis tubulaire (7) attaché à une construction métallique (14), ledit châssis (7) supportant des paliers (15, 16) pour tenir un arbre de commande (17) auquel la partie rotative est fixée et par lequel cette partie rotative est mise en mouvement de rotation.Apparatus according to any one of the preceding claims, characterized in that the fixed part comprises a tubular frame (7) attached to a metal construction (14), said frame (7) supporting bearings (15, 16) for holding a control shaft (17) to which the rotary part is fixed and by which this rotary part is set in rotational movement. Appareil selon la revendication 5, caractérisé en ce que l'arbre de commande (17) est actionné par un moteur électrique (6) par l'intermédiaire d'un réducteur (19).Apparatus according to claim 5, characterized in that the control shaft (17) is actuated by an electric motor (6) via a reduction gear (19). Appareil selon la revendication 5 ou 6, caractérisé en ce que l'arbre de commande (17) confère par des moyens de transmission (8, 9, 24, 11) également un mouvement de rotation autour de son axe 22 au rouleau de répartition (3).Apparatus according to claim 5 or 6, characterized in that the control shaft (17) confers by means of transmission (8, 9, 24, 11) also a rotational movement around its axis 22 to the distribution roller ( 3).
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
LU87697A LU87697A1 (en) 1990-03-12 1990-03-12 APPARATUS FOR DISPENSING AND DISTRIBUTING PULVERULENT OR GRANULAR RAW MATERIALS
LU87697 1990-03-12

Publications (2)

Publication Number Publication Date
EP0446734A2 true EP0446734A2 (en) 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 (en)
LU (1) LU87697A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0059411A1 (en) * 1981-02-26 1982-09-08 Elkem A/S Apparatus for spreading covering material
GB2207663A (en) * 1987-07-21 1989-02-08 Funken Kk Continuous constant-rate particle feeding device with roller with grooves for feeding particles without crumbling even though these particles are readily subject to crumbling

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0059411A1 (en) * 1981-02-26 1982-09-08 Elkem A/S Apparatus for spreading covering material
GB2207663A (en) * 1987-07-21 1989-02-08 Funken Kk Continuous constant-rate particle feeding device with roller with grooves for feeding particles without crumbling even though these particles are readily subject to crumbling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Semaine E03, 3 mars 1982. Derwent Publications Ltd., Londres GB. *

Also Published As

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

Similar Documents

Publication Publication Date Title
FR2528085A1 (en) Device for spreading gravel etc. - attaches to rear of tipping lorry and distributes gravel evenly across road
FR2695464A1 (en) Closed induction furnace for melting and casting.
EP0132202A1 (en) Mobile device for the in situ cold mixing and spreading of bitumen-coated products for road surfacings
EP0167470A1 (en) Golf ball dispenser
EP1001039B1 (en) Rotating chute for distributing loose material with adjustable angle
EP1129221B1 (en) Device for dispensing bulk materials
EP0446734A2 (en) Device for distributing and spreading pulverulent or granular raw materials
EP2167259B1 (en) Filling device for at least two granular materials and filling method using such a device
FR2700313A1 (en) Machine for distributing, filling and closing by welding flakes intended for artificial insemination.
FR2727075A1 (en) Manually driven device for helicoidally wrapping e.g. pallet load with plastics film
FR2503108A1 (en) TRANSPORTING APPARATUS WITH RACLETTES
CA2155021A1 (en) Feed device for gravitationally depositing a granular material on the surface of a continuously cast molten metal
EP1035956B1 (en) Surfacing device
BE1004046A3 (en) Pulverulent mass metering and conveyance device
FR2537019A1 (en) VERTICAL CYLINDRICAL SCREEN CLEANING MACHINE WITH OSCILLATING ROTATION SPEED
FR2555981A1 (en) MOLTEN GLASS DROP DISPENSER HAVING AN IMPROVED DEVICE FOR SUPPORTING AND ROTATING THE VERTICAL MIXING TUBE OF THE DISPENSER
EP0511465A2 (en) Electromagnetic agitating method for continuous casting
FR2787871A1 (en) Machine for automatic lining of crucibles with refractory material for induction heating furnaces
FR2626808A1 (en) Method and device for automatically fitting a reinforcement in a mould capable of receiving pourable materials such as concrete
FR2824014A1 (en) CONTAINER ROTATION HOLDING AND DRIVING DEVICE
EP1225021B1 (en) Dispositif de coulée sous vide
FR2635029A1 (en) Device for automatically supplying a continuous-casting ingot mould with powdery or granular product
BE390555A (en)
FR2669041A1 (en) Process for the treatment of a molten metal and its transfer into a receiving cavity and system for making use of this process
FR2556919A1 (en) Fertiliser spreader for rear of tractor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19911130

17Q First examination report despatched

Effective date: 19930402

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19931113