ES2331586T3 - CONNECTION SYSTEM BETWEEN CONTINUOUS MILLS, SERIES, OF A GRINDING INSTALLATION. - Google Patents

CONNECTION SYSTEM BETWEEN CONTINUOUS MILLS, SERIES, OF A GRINDING INSTALLATION. Download PDF

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Publication number
ES2331586T3
ES2331586T3 ES06075032T ES06075032T ES2331586T3 ES 2331586 T3 ES2331586 T3 ES 2331586T3 ES 06075032 T ES06075032 T ES 06075032T ES 06075032 T ES06075032 T ES 06075032T ES 2331586 T3 ES2331586 T3 ES 2331586T3
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Prior art keywords
mouth
mill
installation
loading
discharge
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Spanish (es)
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Simone Casadio
Piero Poli
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Sacmi Imola SC
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Sacmi Imola SC
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/007—Disintegrating plant with or without drying of the material using a combination of two or more drum or tube mills

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Milling Processes (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

A milling plant (1) comprising a plurality of continuous mills (2) provided with a loading mouth (6) of the material and a discharge mouth (8) of the casting slip, which are placed in series by means of a connection element (19) which, associated with an input device (20, 21), connects the discharge mouth (8) of a mill with the loading mouth (6) of the contiguous mill; said connection element (19) being associated with advancement means (23) adapted to advance the material which flows inside the connector (19) itself towards the loading mouth (6).

Description

Sistema de conexión entre molinos continuos, en serie, de una instalación de molienda.Connection system between continuous mills, in series, of a milling facility.

La presente invención se refiere en general a una instalación de molienda de acuerdo con la parte precaracterizadora de la reivindicación 1 que está concebida particular, aunque no de manera exclusiva, para su utilización en la preparación de mezclas de cerámica. En efecto, dichas mezclas se preparan en general por medio de la pulverización en húmedo de las materias primas (sílice, feldespato, arcilla) y la aportación de aditivos específicos, hasta que se obtenga una barbotina de colada homogénea de moldeo que presente la deseada granulometría de los polvos en suspensión.The present invention generally relates to a milling facility according to the part pre-characterizing of claim 1 which is designed particular, but not exclusively, for use in the preparation of ceramic mixtures. Indeed, such mixtures are they prepare in general by means of wet spraying of raw materials (silica, feldspar, clay) and the contribution of specific additives, until a casting slip is obtained homogeneous molding that presents the desired granulometry of the suspended powders

Como es conocido, una de estas instalaciones comprende normalmente por lo menos un molino triturador, que está provisto de un cilindro giratorio, en cuyo interior se efectúa la operación de pulverización de las materias primas por el choque, y en cualquier caso la interacción, entre dichas materias primas y un conjunto de cuerpos trituradores, generalmente esféricos.As is known, one of these facilities normally comprises at least one grinder mill, which is provided with a rotating cylinder, inside which the raw material spray operation by shock, and in any case the interaction between said raw materials and a set of crushing bodies, generally spherical.

Los molinos trituradores conocidos se subdividen en molinos continuos y discontinuos, según los cuales las etapas de carga del material dentro del cilindro giratorio y la descarga de la barbotina de colada tienen lugar de manera continua durante el funcionamiento del molino, o de manera discontinua, requiriendo la interrupción temporal del proceso de producción y la detención del cilindro giratorio.Known mills are subdivided in continuous and discontinuous mills, according to which the stages of loading of the material inside the rotating cylinder and the discharge of the casting slip takes place continuously during the mill operation, or discontinuously, requiring the Temporary interruption of the production process and the detention of rotating cylinder

La presente invención se refiere en general a una instalación de molienda que comprende unos molinos de tipo continuo.The present invention generally relates to a milling facility comprising type mills continuous.

Según la técnica anterior en el campo de la cerámica, el proceso de pulverización de las materias primas prevé un conjunto de etapas sucesivas, que comienzan con una etapa de triturado y finalizan con una etapa de refinado. Para las diferentes etapas, los cuerpos trituradores deben presentar tamaños diferentes y en disminución, que pasan del triturado al refinado y, en consecuencia, para cada una de dichas etapas existe una velocidad del cilindro giratorio que optimiza la efectividad del procesado, el tiempo de ejecución y el consumo de energía del molino triturador.According to the prior art in the field of ceramics, the process of spraying raw materials provides a set of successive stages, which begin with a stage of crushed and finish with a refining stage. For the different stages, the crushing bodies must have sizes different and declining, which go from crushing to refining and, consequently, for each of these stages there is a speed  of the rotating cylinder that optimizes the effectiveness of the processing, runtime and mill energy consumption shredder

Por lo tanto, son conocidas instalaciones que comprenden una serie de molinos trituradores continuos colocados en serie entre sí, en los cuales el cilindro giratorio de cada molino contiene los cuerpos trituradores, y está adaptado para girar a una velocidad independiente de los otros, a fin de poder ejecutar de manera óptima una de las etapas mencionadas anteriormente del proceso de pulverización.Therefore, facilities are known that They comprise a series of continuous crusher mills placed in series with each other, in which the rotating cylinder of each mill it contains the crushing bodies, and is adapted to rotate to a speed independent of the others, in order to run from optimally one of the stages mentioned above of the spraying process

En una instalación similar, cada cilindro giratorio de la instalación mencionada anteriormente está provisto de una boca de carga del material que debe procesarse y una boca de descarga de la barbotina de colada que, fijada en partes opuestas del cilindro y dispuesta a lo largo del eje giratorio del mismo, está adaptada para girar de forma integral con el cilindro, facilitando el avance continuo del material de entrada y la barbotina de colada de salida.In a similar installation, each cylinder swivel of the installation mentioned above is provided of a loading mouth of the material to be processed and a mouth of unloading of the casting slip which, fixed on opposite sides of the cylinder and arranged along the rotating axis thereof, It is adapted to rotate integrally with the cylinder, facilitating the continuous advance of the input material and the Exit wash slip.

Además, la boca de descarga de un cilindro giratorio intermedio está conectada a la boca de carga del cilindro sucesivo por medio de un elemento de conexión tubular, que está a su vez conectada a un dispositivo de entrada adaptado para introducir los cuerpos trituradores y los aditivos apropiados (por ejemplo colorantes) directamente al interior del cilindro aguas abajo.In addition, the discharge mouth of a cylinder intermediate swivel is connected to the cylinder loading mouth successive by means of a tubular connection element, which is at its once connected to an input device adapted to introduce crushing bodies and appropriate additives (for example dyes) directly inside the downstream cylinder.

Un inconveniente del que adolecen estas instalaciones conocidas reside en el hecho de que el elemento tubular de conexión, a diferencia de los conductos de descarga y de carga, que gira de manera íntegra con los cilindros giratorios respectivos, debe ser solidario con el dispositivo de entrada y, en consecuencia, debe ser fijo.A disadvantage of these known facilities lies in the fact that the element tubular connection, unlike the discharge ducts and load, which rotates integrally with the rotating cylinders respectively, must be in solidarity with the input device and, in Consequently, it must be fixed.

Por esta razón, el material que avanza entre un cilindro giratorio y el siguiente, cuando se cruza el elemento de conexión, tiende a detenerse, bloqueando el conector propiamente dicho y comprometiendo así el funcionamiento de toda la instalación.For this reason, the material that advances between a rotating cylinder and the next one, when you cross the element of connection, tends to stop, blocking the connector itself said and thus compromising the operation of all the installation.

Una solución conocida para mejorar esta transferencia de material tal como se describe en la memoria de patente US nº 3 942 727, comprende una serie de molinos continuos colocados en serie, en los cuales la boca de descarga de un molino y la boca de carga del molino subsiguiente van conectadas por medio de un elemento de conexión que comprende medios adaptados para hacer que el material que lo cruza avance continuamente.A known solution to improve this material transfer as described in the memory of US Patent No. 3 942 727, comprises a series of continuous mills placed in series, in which the discharge mouth of a mill and the loading mouth of the subsequent mill are connected by of a connection element comprising means adapted for make the material that crosses it progress continuously.

El objetivo de la presente invención consiste en superar el inconveniente mencionado, dentro del ámbito de una solución simple y racional con un coste limitado. Dicho objetivo se alcanza mediante una instalación de molino continuo según la reivindica-
ción 1.The objective of the present invention is to overcome the aforementioned drawback, within the scope of a simple and rational solution with a limited cost. Said objective is achieved by means of a continuous mill installation according to the claim.
tion 1.

Según la invención, dichos medios de avance comprenden un cuerpo helicoidal fijado al extremo libre de una de las bocas de descarga del molino situado aguas arriba y la boca de carga del molino situado aguas abajo, de modo que el citado cuerpo helicoidal se introduzca dentro del elemento de conexión, realizándose de este modo un dispositivo de tornillo con este último, lo que permite el avance del material.According to the invention, said advancing means they comprise a helical body fixed to the free end of one of the discharge mouths of the mill located upstream and the mouth of mill load located downstream, so that the aforementioned body helical is inserted into the connection element, thus performing a screw device with this Last, which allows the material to advance.

Otras características y ventajas de la invención se pondrán de manifiesto al leer la siguiente descripción proporcionada a título de ejemplo no limitativo, a partir de las figuras ilustradas en las tablas adjuntas, en las cuales:Other features and advantages of the invention will be revealed by reading the following description provided by way of non-limiting example, from figures illustrated in the attached tables, in which:

- la figura 1 muestra una vista esquemática de la instalación de molino continuo según la invención;- Figure 1 shows a schematic view of the continuous mill installation according to the invention;

- la figura 2 muestra un detalle de la figura en sección longitudinal.- Figure 2 shows a detail of the figure in longitudinal section.

Haciendo referencia a las figuras adjuntas, la instalación de molienda, que es el objeto de la presente invención, indicada en su totalidad con el número de referencia 1, comprende una serie de molinos continuos 2, colocados en serie. Cada molino 2 comprende un cilindro giratorio 3, que se forma por un cuerpo cilíndrico 4 de eje horizontal, cerrado en un extremo por una primera parte inferior 5, provista de una boca axial 6 para la carga del material, y cerrado en el extremo opuesto por una parte inferior 7, provista de una boca axial 8 para la descarga de la barbotina de colada.Referring to the attached figures, the milling facility, which is the object of the present invention, indicated in full with reference number 1, includes a series of continuous mills 2, placed in series. Each mill 2 It comprises a rotating cylinder 3, which is formed by a body cylindrical 4 of horizontal axis, closed at one end by a first lower part 5, provided with an axial mouth 6 for loading  of the material, and closed at the opposite end by one part bottom 7, provided with an axial mouth 8 for the discharge of the wash slip

El cuerpo cilíndrico 3 está apoyado en cada uno de los extremos por una estructura 9 adecuada, y es accionado por un sistema de control 10 apropiado a través de un sistema de correa 11.The cylindrical body 3 is supported on each of the ends by a suitable structure 9, and is driven by an appropriate control system 10 through a belt system eleven.

Dentro del cuerpo cilíndrico 3, se define una cámara de triturado, en cuyo interior se alimentan tanto los cuerpos trituradores y las materias primas que componen la barbotina de colada, o más bien básicamente agua, sílice, feldespato y arcilla. Los cuerpos trituradores son normalmente de sílice o aluminio y durante el funcionamiento de la instalación se desgastan hasta que se mezclan con la barbotina de colada que se está procesando.Within the cylindrical body 3, a crushing chamber, inside which both are fed crushing bodies and raw materials that make up the slip of laundry, or rather basically water, silica, feldspar and clay. The crushing bodies are normally of silica or aluminum and during the operation of the installation wear out until they mix with the pouring slip that is processing

En la figura 1, se observa que el primer molino continuo 2 aguas arriba está provisto de un sistema normal ya conocido de carga 18 de las materias primas, y que la boca de carga 6 del segundo molino, y los posibles molinos posteriores, están conectados a la boca de descarga 8 del molino precedente por medio de un elemento tubular de conexión 19. Conectados a dicho conector tubular 19 existe un conducto adicional de entrada 20 que, asociado con un dispositivo normal de carga 21, está adaptado para alimentar tanto los cuerpos trituradores como otros aditivos.In figure 1, it is observed that the first mill continuous 2 upstream is provided with a normal system already known cargo 18 of the raw materials, and that the loading mouth 6 of the second mill, and possible subsequent mills, are connected to the discharge mouth 8 of the preceding mill by means of a tubular connecting element 19. Connected to said connector tubular 19 there is an additional inlet duct 20 which, associated With a normal charging device 21, it is adapted to power both crushing bodies and other additives.

De manera conveniente, dicho conducto de entrada 20 permite tanto reintegrar separadamente los cuerpos trituradores para cada uno de los molinos continuos 2, como introducir separadamente materiales, o agua, permitiendo constantemente una corrección de la mezcla y garantizando de este modo una composición óptima.Conveniently, said inlet duct 20 allows both to reintegrate the crushing bodies separately for each of the continuous mills 2, how to enter separately materials, or water, constantly allowing a correction of the mixture and thus guaranteeing a composition optimal

Dado que cada uno de los molinos continuos 2 de la instalación de molienda 1 se encuentran funcionalmente independientes entre sí, se dimensionan y optimizan en términos geométricos, tanto en lo que se refiere a las dimensiones de los cuerpos trituradores como a la velocidad de giro, para la etapa específica de pulverización al que están asignados, y la barbotina de colada del proceso pasa continuamente de un cilindro giratorio 3 al siguiente sin interrupción del proceso, hasta que se obtenga la granulometría deseada de los polvos en suspensión.Since each of the continuous mills 2 of the milling facility 1 are functionally independent of each other, they are sized and optimized in terms geometric, both in regard to the dimensions of the crushing bodies as at the speed of rotation, for the stage specific spray to which they are assigned, and the slip process casting continuously passes from a rotating cylinder 3 to the next without interruption of the process, until the Desired particle size of the powders in suspension.

En detalle, tal como se ilustra en la figura 2, la liberación de la barbotina de colada refinada desde la cámara operativa de un cilindro giratorio 3 se asigna a medios normales 13 ya conocidos que, en consecuencia, no se describirán adicionalmente. No obstante, deberá señalarse que, a pesar del hecho de que dichos medios de liberación 13 están adaptados para hacer avanzar la barbotina de colada hacia el cilindro giratorio 3 colocado aguas abajo, dicho avance se permite también, y en consecuencia se hace efectivo, por el giro de la boca de descarga 8 y la boca de carga 6, que forman parte integrante de los cilindros giratorios respectivos 3.In detail, as illustrated in Figure 2, the release of the refined casting slip from the chamber operating of a rotating cylinder 3 is assigned to normal means 13 already known that, consequently, will not be described further. However, it should be noted that, despite the fact that said release means 13 are adapted to make advance the casting slip towards the rotating cylinder 3 placed downstream, such advance is also allowed, and in consequence becomes effective, by turning the discharge mouth 8 and the loading mouth 6, which are an integral part of the cylinders respective swivel 3.

Como se ha mencionado anteriormente, entre dicha boca de descarga 8 y la boca de carga 9, se interpone el conector 19, que está compuesto por un tubo fijado a la estructura de soporte 9 por medio de dos soportes rígidos 25, a los que va asociada giratoriamente la boca de descarga 8 por un lado, mientras que, al otro lado, va asociada giratoriamente la boca de carga 6. Con mayor detalle, el extremo libre de la boca de descarga 8 se inserta axialmente en una sección dentro del conector tubular 19, el cual, a su vez se inserta en una sección dentro del extremo libre de la boca de carga 6.As mentioned above, between said discharge port 8 and loading port 9, the connector is interposed 19, which is composed of a tube fixed to the support structure 9 by means of two rigid supports 25, to which it is associated rotating the discharge mouth 8 on the one hand, while on the other hand, the loading mouth 6 is rotatably associated. detail, the free end of the discharge mouth 8 is inserted axially in a section inside the tubular connector 19, which, to in turn it is inserted into a section inside the free end of the loading mouth 6.

Posiblemente, entre dichas bocas de descarga 8 y de carga 6 y el conector tubular 19, pueden interponerse unos medios de sellado que están adaptados para evitar convenientemente que haya pérdidas de material desde la instalación 1.Possibly, between said discharge mouths 8 and of load 6 and the tubular connector 19, some sealing means that are adapted to conveniently avoid that there are losses of material since installation 1.

En particular, como puede apreciarse a partir de la figura 2, en el extremo libre del conducto de descarga 8, va en voladizo un cuerpo helicoidal 23 que, extendiéndose coaxialmente dentro del conector tubular, realiza un dispositivo de tornillo con este
último.In particular, as can be seen from Figure 2, at the free end of the discharge duct 8, a helical body 23 is cantilevered which, extending coaxially inside the tubular connector, makes a screw device with this
latest.

Durante el funcionamiento de la instalación 1, los cilindros giratorios 3 giran independientemente entre sí y, en consecuencia, ponen en rotación las bocas de descarga 8 y de carga 6, mientras que el conector tubular 19 permanece fijo. De este modo, el cuerpo helicoidal 23, que está unido a la boca de descarga 8, gira dentro de dicho conector 19, y empuja el material procedente del cilindro giratorio aguas arriba 3 y del conducto de entrada 20 para avanzar hacia la boca de carga 6 del cilindro giratorio aguas abajo 3.During the operation of installation 1, the rotating cylinders 3 rotate independently of each other and, in consequently, they rotate the discharge and load nozzles 8 6, while the tubular connector 19 remains fixed. Of this mode, the helical body 23, which is attached to the discharge mouth 8, rotate inside said connector 19, and push the material from the upstream rotating cylinder 3 and the duct inlet 20 to advance towards the loading mouth 6 of the cylinder downstream swivel 3.

Evidentemente, pueden introducirse en la instalación así descrita modificaciones o mejoras sugeridas, sin apartarse del alcance de la invención tal como se reivindica a continuación.Obviously, they can be introduced in the installation thus described modifications or suggested improvements, without depart from the scope of the invention as claimed by continuation.

Claims (5)

1. Instalación de molienda (1) que comprende una pluralidad de molinos continuos provistos de una boca de carga (6) del material y una boca de descarga (8) de la barbotina de colada, que están dispuestos en serie por medio de un elemento de conexión fijo (19) que, asociado con un dispositivo de entrada (20, 21), conecta la boca de descarga (8) de un molino con la boca de carga (6) del molino contiguo, en la que dicho elemento de conexión (19) está asociado con unos medios de avance (23) adaptados para hacer avanzar el material que fluye dentro del mismo conector (19) hacia la boca de carga (6), caracterizada porque dichos medios de avance comprenden un cuerpo helicoidal (23) colocado dentro del elemento de conexión (19), y accionado para hacerlo girar de manera que realice con este último un dispositivo de tornillo que permita el avance del material.1. Grinding installation (1) comprising a plurality of continuous mills provided with a loading mouth (6) of the material and a discharge mouth (8) of the casting slipper, which are arranged in series by means of an element fixed connection (19) which, associated with an input device (20, 21), connects the discharge mouth (8) of a mill with the loading mouth (6) of the adjacent mill, in which said connecting element (19) is associated with advancing means (23) adapted to advance the material flowing inside the same connector (19) towards the loading mouth (6), characterized in that said advancing means comprise a helical body (23) placed inside the connecting element (19), and actuated to rotate it so that it performs with the latter a screw device that allows the material to advance. 2. Instalación (1) según la reivindicación 1, caracterizada porque el cuerpo helicoidal (23) se encuentra en voladizo en la boca de descarga (8), de tal manera que pueda ser desplazado por el giro del molino continuo (2), el cual está asociada dicha boca.2. Installation (1) according to claim 1, characterized in that the helical body (23) is cantilevered in the discharge mouth (8), so that it can be displaced by the rotation of the continuous mill (2), the which mouth is associated. 3. Instalación (1) según la reivindicación 1, caracterizada porque el cuerpo helicoidal (23) se encuentra en voladizo en la boca de descarga (6), de tal manera que pueda ser desplazado por el giro del molino continuo (2), al cual está asociada dicha boca.3. Installation (1) according to claim 1, characterized in that the helical body (23) is cantilevered in the discharge mouth (6), so that it can be displaced by the rotation of the continuous mill (2), to the which mouth is associated. 4. Instalación (1) según la reivindicación 1, caracterizada porque el dispositivo de entrada comprende un dispositivo de carga (21) del material, y un conducto de entrada (20) que conecta dicho dispositivo de carga (21) al elemento de conexión (19).4. Installation (1) according to claim 1, characterized in that the input device comprises a loading device (21) of the material, and an input conduit (20) connecting said charging device (21) to the connecting element ( 19). 5. Instalación (1) según la reivindicación 1, caracterizada porque entre cada una de las bocas de descarga (8) y las bocas de carga (6), y el elemento de conexión (19), se interponen unos medios de sellado.5. Installation (1) according to claim 1, characterized in that between each of the discharge nozzles (8) and the loading nozzles (6), and the connecting element (19), sealing means are interposed.
ES06075032T 2005-02-11 2006-01-10 CONNECTION SYSTEM BETWEEN CONTINUOUS MILLS, SERIES, OF A GRINDING INSTALLATION. Active ES2331586T3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE05A0011 2005-02-11
IT000011A ITRE20050011A1 (en) 2005-02-11 2005-02-11 CONNECTION SYSTEM BETWEEN CONTINUOUS MILLS IN SERIES OF A MILLING PLANT

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EP (1) EP1690597B1 (en)
CN (1) CN1817600B (en)
AT (1) ATE442906T1 (en)
DE (1) DE602006009161D1 (en)
ES (1) ES2331586T3 (en)
IT (1) ITRE20050011A1 (en)
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ITRE20060089A1 (en) * 2006-07-20 2008-01-21 Sacmi CONNECTION SYSTEM BETWEEN CONTINUOUS MILLS IN SERIES OF A MILLING PLANT
ITMO20070138A1 (en) * 2007-04-19 2008-10-20 Siti B & T Group S P A "MILLING PLANT"
ITMO20130299A1 (en) * 2013-10-21 2015-04-22 Mario Dazzi MILLING PLANT
CN105080671B (en) * 2015-09-10 2018-06-08 佛山市浩丰重工有限公司 A kind of energy-efficient continuous ball mill
IT201600123088A1 (en) * 2016-12-05 2018-06-05 Certech Spa Con Socio Unico Method and equipment for the transformation of a mill.
IT201800003874A1 (en) * 2018-03-22 2019-09-22 Certech Spa Con Socio Unico Mill for ceramic materials
CN108855539A (en) * 2018-06-23 2018-11-23 宁波中科远东催化工程技术有限公司 A kind of production line and production method of water-saving high solids content slurry
CN111570065A (en) * 2020-05-29 2020-08-25 济南大学 Powder preparation grinding machine

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DE259540C (en) *
SE410561B (en) * 1973-04-13 1979-10-22 Boliden Ab INSTALLATION FOR AUTOGEN OR SEMIAUTOGEN GRINDING OF PIECE MATERIAL, SPECIAL ORE
JPS5725272B2 (en) * 1973-05-01 1982-05-28
US4603814A (en) * 1985-03-15 1986-08-05 Inco Alloys International, Inc. System for discharging rotary mills

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PL1690597T3 (en) 2010-02-26
RU2394650C2 (en) 2010-07-20
PT1690597E (en) 2009-11-18
EP1690597B1 (en) 2009-09-16
ATE442906T1 (en) 2009-10-15
DE602006009161D1 (en) 2009-10-29
EP1690597A1 (en) 2006-08-16
ITRE20050011A1 (en) 2006-08-12
CN1817600B (en) 2014-12-24
RU2006101762A (en) 2007-07-27

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