EP0096852A1 - Rotary bowl mill - Google Patents
Rotary bowl mill Download PDFInfo
- Publication number
- EP0096852A1 EP0096852A1 EP83105662A EP83105662A EP0096852A1 EP 0096852 A1 EP0096852 A1 EP 0096852A1 EP 83105662 A EP83105662 A EP 83105662A EP 83105662 A EP83105662 A EP 83105662A EP 0096852 A1 EP0096852 A1 EP 0096852A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mill
- indicating
- height
- layer
- tank
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
Definitions
- the present invention relates to a tank mill with a vertical axis in relative rotational movement with respect to members for pressing the material to be ground against the tank surface controlled by hydraulic jacks, with an adjustment and control circuit depending on the material to be ground, comprising a member indicating the height of the layer of material between the pressing members and the tank and a member indicating the pressure of the hydraulic fluid in the jacks.
- Patent application FR-A * 2424065 of the applicant describes mills with a rotating tank of vertical axis and rollers with pendular suspension and pressed against the material to be ground by hydraulic jacks, with adjustment and control circuit making it possible to modify the pressure of the rollers as a function of the material to be ground or according to a predetermined law during grinding, comprising members indicating the pressure and position of the jacks, and a device for regulating the pressure of the jacks, sensitive to the data supplied by the members indicators, setting the pressure of the cylinders according to the material to be ground and possibly according to a predetermined law.
- the object of the present invention is to remedy these difficulties, and to provide a tank mill which automatically adapts to the characteristics of the material to be ground when these change during its operation, and which therefore avoids any incident and any stopping of its progress when it is supplied with a material of characteristics varying over time.
- the crusher according to the invention is characterized in that it further comprises a member indicating the power absorbed by the crusher, a member indicating the flow of material introduced into the crusher, and means sensitive to the data of the indicator members for maintaining a variation of the height as a function of the flow rate of the mill according to a predetermined law.
- the predetermined law for adjusting the height of the material layer is preferably linear between 30% and 100% of the maximum flow rate.
- FIG. 1 represents the crusher and its control device as a function of the height of the layer of coal during grinding.
- Figure 2 shows the linear relationship between the coal flow rate and the height of the layer in the mill.
- the rotary vat mill 1 with an axis of rotation 2 has an inclined flange 3 forming a raceway for the frustoconical rollers such as 4, of which only one is shown.
- the roller 4 is carried by the axis 5 pivoting around the articulation 6.
- the end 7 of the axis 5 is articulated on the rod 8 of a hydraulic cylinder 9 with piston 10.
- the coal to be ground, stored in the hopper 11, is taken up by the endless movement grid 12, the drive roller 13 of which is driven by the motor 14. Its thickness on the grid is fixed by a scraper 15. It falls of the grid in the vertical duct 16 which opens onto the mill above its axis. It is then projected onto the periphery of the rotating tank and is crushed by its passage between the rollers and the raceway.
- the pressure of the hydraulic cylinder 9 is controlled by a control device 17, which in particular comprises a reservoir of hydraulic fluid, a pump and a pressure regulator, all three of known type and not shown.
- the control device 17 is connected to the jack 9 by the conduit 18 and to the control and regulation assembly 19.
- This control and regulation assembly receives the indications from the sensor 20, which measures the coal flow rate determined by the speed of rotation of the roller 13, as well as from the sensor 21 disposed near the axis 5 of the roller, which measures the height of the layer of carbon between the roller and the raceway. It is also connected to the sensor 22, connected to the motor 23 for driving the axis of the mill, and which measures the power absorbed by the latter. It is finally connected to the sensor 24 which measures the hydraulic pressure applied to the jack 8.
- the control and regulation assembly 19 constituted for example by a microprocessor, develops the pressure to be applied to the jack 8 by means of the control device 17 as a function of the coal flow rate indicated by the sensor 20 to obtain the layer height measured by the sensor 21, which will respond to the linear relationship between the coal flow rate D (in% of the nominal flow rate) and the layer height H (in mm) shown in FIG. 2. This relationship is valid for flow rates varying from 30 at 100% of the nominal flow, the height of the carbon layer varying for example from 15 to 25 mm.
- the control and regulation assembly 19 is also sensitive to the power absorbed by the crusher, indicated by the sensor 22, as well as to the pressure of application of the rollers against the coal to be ground in the tank, indicated by the sensor 24. It weighs the respective effects of variations in the height of the coal layer, the flow of coal, the power absorbed by the mill and the pressure of application of the rollers so as to maintain between the flow of coal and the thickness of carbon during grinding between the rollers and the revolving tank, a linear relationship similar to that of FIG. 2. Furthermore, the sensors 22 and 24 can be connected to visual or graphic recording instruments, and possibly to emergency stop devices, not shown.
- the crusher which has just been described with reference to FIG. 1 of the drawing appears to be the preferable embodiment of the invention, it will be understood that various modifications can be made to it without departing from its general framework, certain of its organs can be replaced by others who would play the same technical role.
- the grinding rollers could be replaced by rollers, balls, etc.
- the supply of the coal mill could be carried out otherwise than by a mobile feeding grid.
- the crusher tank could be fixed, and the grinding members mobile.
- the invention applies firstly to the grinding of coal, but it would also be suitable for the grinding of other materials, such as ores, phosphates, etc.
Abstract
Description
La présente invention concerne un broyeur à cuve d'axe vertical en mouvement de rotation relatif par rapport à des organes de pressage du matériau à broyer contre la surface de la cuve commandés par des vérins hydrauliques, avec circuit de réglage et de contrôle en fonction du matériau à broyer, comprenant un organe indicateur de la hauteur de la couche de matériau entre les organes de pressage et la cuve et un organe indicateur de la pression du fluide hydraulique dans les vérins.The present invention relates to a tank mill with a vertical axis in relative rotational movement with respect to members for pressing the material to be ground against the tank surface controlled by hydraulic jacks, with an adjustment and control circuit depending on the material to be ground, comprising a member indicating the height of the layer of material between the pressing members and the tank and a member indicating the pressure of the hydraulic fluid in the jacks.
La demande de brevet FR-A*2424065 de la demanderesse décrit des broyeurs à cuve tournante d'axe vertical et à galets à suspension pendulaire et pressés contre le matériau à broyer par des vérins hydrauliques, avec circuit de réglage et de contrôle permettant de modifier la pression des galets en fonction du matériau à broyer ou selon une loi prédéterminée au cours du broyage, comportant des organes indicateurs de pression et de position des vérins, et un dispositif de régulation de la pression des vérins, sensible aux données fournies par les organes indicateurs, fixant la pression des vérins selon le matériau à broyer et éventuellement selon une loi prédéterminée.Patent application FR-A * 2424065 of the applicant describes mills with a rotating tank of vertical axis and rollers with pendular suspension and pressed against the material to be ground by hydraulic jacks, with adjustment and control circuit making it possible to modify the pressure of the rollers as a function of the material to be ground or according to a predetermined law during grinding, comprising members indicating the pressure and position of the jacks, and a device for regulating the pressure of the jacks, sensitive to the data supplied by the members indicators, setting the pressure of the cylinders according to the material to be ground and possibly according to a predetermined law.
Il arrive cependant fréquemment que l'on alimente de tels broyeurs à l'aide d'un matériau dont les caractéristiques, telles que la granulométrie et la friabilité, varient fréquemment au cours d'une période de fonctionnement du broyeur. Comme on ne peut prévoir l'instant où la nouvelle qualité de matériau à broyer va parvenir effectivement dans le broyeur, on risque de faire fonctionner le broyeur dans des conditions très défavorables, et en particulier d'observer un enlisement des galets lorsqu'une qualité de matériau plus friable succède à un matériau moins friable. Cet enlisement entraîne des vibrations ou même un blocage brutal du fonctionnement du broyeur, que l'on ne peut remettre en route qu'après dégagement des galets et nouveau réglage de leur position. Si au contraire un matériau moins friable succède à un matériau plus friable, le matériau moins friable sera insuffisamment broyé jusqu'à ce que l'on s'aperçoive du mauvais fonctionnement du broyeur et modifie le réglage de celui-ci.However, it frequently happens that such mills are supplied with a material, the characteristics of which, such as the grain size and the friability, frequently vary during a period of operation of the mill. As we cannot predict the moment when the new quality of material to be ground will actually reach the mill, there is a risk of operating the mill under very unfavorable conditions, and in particular of observing a bogged down of the rollers when a quality more brittle material succeeds less brittle material. This stagnation causes vibrations or even a sudden blockage of the operation of the crusher, which can not be started again until the rollers have been released and their position has been adjusted again. If, on the other hand, a less friable material succeeds a more friable material, the less friable material will be insufficiently ground until one notices the malfunction of the grinder and modifies the adjustment thereof.
La présente invention a pour but de remédier à ces difficultés, et de procurer un broyeur à cuve qui s'adapte automatiquement aux caractéristiques du matériau à broyer lorsque celles-ci se modifient au cours de son fonctionnement, et qui évite donc tout incident et tout arrêt de sa marche lorsqu'on l'approvisionne en un matériau de caractéristiques variant au cours du temps.The object of the present invention is to remedy these difficulties, and to provide a tank mill which automatically adapts to the characteristics of the material to be ground when these change during its operation, and which therefore avoids any incident and any stopping of its progress when it is supplied with a material of characteristics varying over time.
Le broyeur selon l'invention est caractérisé en ce qu'il comprend en outre un organe indicateur de la puissance absorbée par le broyeur, un organe indicateur du débit de matériau introduit dans le broyeur, et des moyens sensibles aux données des organes indicateurs pour maintenir une variation de la hauteur en fonction du débit du broyeur selon une loi prédéterminée.The crusher according to the invention is characterized in that it further comprises a member indicating the power absorbed by the crusher, a member indicating the flow of material introduced into the crusher, and means sensitive to the data of the indicator members for maintaining a variation of the height as a function of the flow rate of the mill according to a predetermined law.
La loi prédéterminée de réglage de la hauteur de la couche de matériau est de préférence linéaire entre 30% et 100% du débit maximal.The predetermined law for adjusting the height of the material layer is preferably linear between 30% and 100% of the maximum flow rate.
Il est décrit ci-après, à titre d'exemple et en référence aux figures du dessin annexé, un broyeur à charbon à cuve tournante et galets rotatifs selon l'invention, et la loi de réglage de la hauteur de la couche de charbon en fonction du débit traité.It is described below, by way of example and with reference to the figures of the appended drawing, a coal mill with rotating tank and rotary rollers according to the invention, and the law for adjusting the height of the layer of coal in depending on the flow treated.
La figure 1 représente le broyeur et son dispositif de commande en fonction de la hauteur de la couche de charbon en cours de broyage.FIG. 1 represents the crusher and its control device as a function of the height of the layer of coal during grinding.
La figure 2 représente la relation linéaire entre le débit de charbon et la hauteur de la couche dans le broyeur.Figure 2 shows the linear relationship between the coal flow rate and the height of the layer in the mill.
Dans la figure 1, le broyeur à cuve tournante 1 d'axe de rotation 2 comporte un rebord incliné 3 formant chemin de roulement pour les galets tronconiques tels que 4, dont un seul est représenté. Le galet 4 est porté par l'axe 5 pivotant autour de l'articulation 6. L'extrémité 7 de l'axe 5 est articulée sur la tige 8 d'un vérin hydraulique 9 à piston 10.In FIG. 1, the rotary vat mill 1 with an axis of
Le charbon à broyer, emmagasiné dans la trémie 11, est repris par la grille à mouvement sans fin 12, dont le rouleau d'entraînement 13 est entraîné par le moteur 14. Son épaisseur sur la grille est fixée par un râcleur 15. Il tombe de la grille dans le conduit vertical 16 qui débouche sur le broyeur au-dessus de son axe. Il est alors projeté sur le pourtour de la cuve tournante et se trouve broyé par son passage entre les galets et le chemin de roulement.The coal to be ground, stored in the
La pression du vérin hydraulique 9 est commandée par un dispositif de commande 17, qui comporte notamment un réservoir de fluide hydraulique, une pompe et un régulateur de pression, tous trois de type connu et non représentés. Le dispositif de commande 17 est relié au vérin 9 par le conduit 18 et à l'ensemble de contrôle et régulation 19.The pressure of the
Cet ensemble de contrôle et régulation reçoit les indications du capteur 20, qui mesure le débit de charbon déterminé par la vitesse de rotation du rouleau 13, ainsi que du capteur 21 disposé à proximité de l'axe 5 du galet, qui mesure la hauteur de la couche de charbon entre le galet et le chemin de roulement. Il est également relié au capteur 22, relié au moteur 23 d'entraînement de l'axe du broyeur, et qui mesure la puissance absorbée par ce dernier. Il est enfin relié au capteur 24 qui mesure la pression hydraulique appliquée au vérin 8.This control and regulation assembly receives the indications from the
L'ensemble de contrôle et régulation 19, constitué par exemple par un microprocesseur, élabore la pression à appliquer au vérin 8 par l'intermédiaire du dispositif de commande 17 en fonction du débit de charbon indiqué par le capteur 20 pour obtenir la hauteur de couche mesurée par le capteur 21, qui répondra à la relation linéaire entre le débit de charbon D (en % du débit nominal) et la hauteur de couche H (en mm) représentée en figure 2. Cette relation est valable pour des débits variant de 30 à 100% du débit nominal, la hauteur de la couche de charbon variant par exemple de 15 à 25 mm.The control and
L'ensemble de contrôle et régulation 19 est également sensible à la puissance absorbée par le broyeur, indiquée par le capteur 22, ainsi qu'à la pression d'application des galets contre le charbon à broyer dans la cuve, indiquée par le capteur 24. Il pondère les effets respectifs des variations de la hauteur de la couche de charbon, du débit de charbon, de la puissance absorbée par le broyeur et de la pression d'application des galets de façon à maintenir entre le débit de charbon et l'épaisseur de charbon en cours de broyage entre les galets et la cuve tournante, une relation linéaire analogue à celle de la figure 2. Par ailleurs, les capteurs 22 et 24 peuvent être reliés à des instruments d'enregistrement visuel ou graphique, et éventuellement à des organes d'arrêt d'urgence, non représentés.The control and
Bien que le broyeur qui vient d'être décrit ei référence à la figure 1 du dessin paraisse la forme de réalisation préférable de l'invention, on comprendra que diverses modifications peuvent lui être apportées sans sortir de son cadre général, certains de ses organes pouvant être remplacés par d'autres qui joueraient le même rôle technique. En particulier, les galets de broyage pourraient être remplacés par des rouleaux, des billes, etc... L'alimentation du broyeur en charbon pourrait s'effectuer autrement que par une grille d'alimentation mobile. La cuve du broyeur pourrait être fixe, et les organes de broyage mobiles.Although the crusher which has just been described with reference to FIG. 1 of the drawing appears to be the preferable embodiment of the invention, it will be understood that various modifications can be made to it without departing from its general framework, certain of its organs can be replaced by others who would play the same technical role. In particular, the grinding rollers could be replaced by rollers, balls, etc. The supply of the coal mill could be carried out otherwise than by a mobile feeding grid. The crusher tank could be fixed, and the grinding members mobile.
L'invention s'applique en premier lieu en broyage de charbon, mais elle conviendrait aussi pour le broyage d'autres matériaux, tels que des minerais, des phosphates, etc...The invention applies firstly to the grinding of coal, but it would also be suitable for the grinding of other materials, such as ores, phosphates, etc.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT83105662T ATE17447T1 (en) | 1982-06-14 | 1983-06-09 | ROTARY BOWL MILL. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8210312 | 1982-06-14 | ||
| FR8210312A FR2528325A1 (en) | 1982-06-14 | 1982-06-14 | ROTARY TANK MILL |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0096852A1 true EP0096852A1 (en) | 1983-12-28 |
| EP0096852B1 EP0096852B1 (en) | 1986-01-15 |
Family
ID=9274962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83105662A Expired EP0096852B1 (en) | 1982-06-14 | 1983-06-09 | Rotary bowl mill |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0096852B1 (en) |
| JP (1) | JPS594451A (en) |
| AT (1) | ATE17447T1 (en) |
| CA (1) | CA1190908A (en) |
| DE (1) | DE3361842D1 (en) |
| FR (1) | FR2528325A1 (en) |
| ZA (1) | ZA834312B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0647489A1 (en) * | 1993-09-24 | 1995-04-12 | Sintokogio Ltd. | Device for cleaning adhering material off sand |
| ES2261038A1 (en) * | 2004-10-15 | 2006-11-01 | Horst Lutzow | Grinding integral machine for use in material recovery, uses captured characteristics of material such as thickness and geometric form to prepare or treat and then crush down material |
| EP2221129A1 (en) * | 2007-12-07 | 2010-08-25 | Sintokogio, Ltd. | Device for regenerating molding sand |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1161154B (en) * | 1983-04-21 | 1987-03-11 | Carle & Montanari Spa | DEVICE FOR THE ADJUSTMENT AND SURVEILLANCE OF THE THICKNESS OF THE CHOCOLATE FILM IN CHOCOLATE REFINING MACHINES |
| JPS60125260A (en) * | 1983-12-13 | 1985-07-04 | 宇部興産株式会社 | Control of powdering degree of crushed product in vertical roller mill |
| JPS63162049A (en) * | 1986-12-26 | 1988-07-05 | 三菱鉱業セメント株式会社 | Method of operating vertical type mill |
| JPS6432737U (en) * | 1987-08-25 | 1989-03-01 | ||
| CN103912528B (en) * | 2014-03-31 | 2016-08-31 | 金东纸业（江苏）股份有限公司 | Calcium carbonate dry grinding hydraulic system and control method thereof |
| CN109174323A (en) * | 2018-08-09 | 2019-01-11 | 芜湖市昌瑞金属粉末有限公司 | A kind of slug grinding device |
| CN114602609B (en) * | 2022-04-02 | 2023-03-21 | 天津水泥工业设计研究院有限公司 | Design method of striker plate for vertical grinding roller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2424065A1 (en) * | 1978-04-24 | 1979-11-23 | Stein Industrie | Crusher with rotary vessel - has control system to vary pressure of rollers according to material being crushed |
| EP0017342A1 (en) * | 1979-03-19 | 1980-10-15 | F.L. Smidth & Co. A/S | Roller mill and method of operation |
| FR2464750A2 (en) * | 1979-09-12 | 1981-03-20 | Stein Industrie | Rotating bowl crusher with suspended crushing roller - uses speed and input suction transducers to automatically empty bowl |
| EP0048787A2 (en) * | 1980-10-01 | 1982-04-07 | Combustion Engineering, Inc. | Electronic controller of hydraulic pressure for journal loading of bowl mill |
-
1982
- 1982-06-14 FR FR8210312A patent/FR2528325A1/en active Granted
-
1983
- 1983-06-09 AT AT83105662T patent/ATE17447T1/en not_active IP Right Cessation
- 1983-06-09 EP EP83105662A patent/EP0096852B1/en not_active Expired
- 1983-06-09 DE DE8383105662T patent/DE3361842D1/en not_active Expired
- 1983-06-13 JP JP58105619A patent/JPS594451A/en active Granted
- 1983-06-13 CA CA000430282A patent/CA1190908A/en not_active Expired
- 1983-06-13 ZA ZA834312A patent/ZA834312B/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2424065A1 (en) * | 1978-04-24 | 1979-11-23 | Stein Industrie | Crusher with rotary vessel - has control system to vary pressure of rollers according to material being crushed |
| EP0017342A1 (en) * | 1979-03-19 | 1980-10-15 | F.L. Smidth & Co. A/S | Roller mill and method of operation |
| FR2464750A2 (en) * | 1979-09-12 | 1981-03-20 | Stein Industrie | Rotating bowl crusher with suspended crushing roller - uses speed and input suction transducers to automatically empty bowl |
| EP0048787A2 (en) * | 1980-10-01 | 1982-04-07 | Combustion Engineering, Inc. | Electronic controller of hydraulic pressure for journal loading of bowl mill |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0647489A1 (en) * | 1993-09-24 | 1995-04-12 | Sintokogio Ltd. | Device for cleaning adhering material off sand |
| CN1043315C (en) * | 1993-09-24 | 1999-05-12 | 新东工业株式会社 | Device for cleaning adhering material off of sand |
| ES2261038A1 (en) * | 2004-10-15 | 2006-11-01 | Horst Lutzow | Grinding integral machine for use in material recovery, uses captured characteristics of material such as thickness and geometric form to prepare or treat and then crush down material |
| EP2221129A1 (en) * | 2007-12-07 | 2010-08-25 | Sintokogio, Ltd. | Device for regenerating molding sand |
| EP2221129A4 (en) * | 2007-12-07 | 2012-03-28 | Sintokogio Ltd | Device for regenerating molding sand |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1190908A (en) | 1985-07-23 |
| FR2528325B1 (en) | 1984-11-30 |
| ATE17447T1 (en) | 1986-02-15 |
| ZA834312B (en) | 1984-03-28 |
| JPH0137972B2 (en) | 1989-08-10 |
| EP0096852B1 (en) | 1986-01-15 |
| DE3361842D1 (en) | 1986-02-27 |
| FR2528325A1 (en) | 1983-12-16 |
| JPS594451A (en) | 1984-01-11 |
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