WO2023141730A1 - Device, system and method for draining liquids from inside mills - Google Patents

Device, system and method for draining liquids from inside mills Download PDF

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Publication number
WO2023141730A1
WO2023141730A1 PCT/CL2022/050010 CL2022050010W WO2023141730A1 WO 2023141730 A1 WO2023141730 A1 WO 2023141730A1 CL 2022050010 W CL2022050010 W CL 2022050010W WO 2023141730 A1 WO2023141730 A1 WO 2023141730A1
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WO
WIPO (PCT)
Prior art keywords
drainage
mill
cavity
liquids
drainage device
Prior art date
Application number
PCT/CL2022/050010
Other languages
Spanish (es)
French (fr)
Inventor
Juan Patricio MURA ULLOA
Eric Edgardo JORQUERA GALLARDO
Diego Ignacio NUÑEZ CUEVAS
Mauricio Hernán SEGOVIA SEDÁN
Original Assignee
Compañía Electro Metalúrgica S.A.
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 Compañía Electro Metalúrgica S.A. filed Critical Compañía Electro Metalúrgica S.A.
Priority to PCT/CL2022/050010 priority Critical patent/WO2023141730A1/en
Publication of WO2023141730A1 publication Critical patent/WO2023141730A1/en

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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
    • 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
    • B02C17/04—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 with unperforated container
    • 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
    • B02C17/10—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 with one or a few disintegrating members arranged in the container
    • 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
    • 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
    • B02C17/22—Lining for containers

Definitions

  • the present invention relates to the mining industry.
  • the present invention relates to a device, system and method that allows liquids to be drained from inside the mills without the need to dismantle the interior linings.
  • the drainage of water is done by removing some interior linings of the mill to uncover the anchoring holes in the body of the mill, so that the water drains through the holes by the action of gravity.
  • the procedure described is high risk, since it requires operators and machinery to enter the interior of the mill to remove the linings, since inside the mill there are rocks, grinding elements mixed with water and mud, so the workers and machinery are at risk of slipping or being struck by rocks and grinding media that slide or fall from the top of the mill body. This procedure requires valuable extra time, additional maneuvering procedures and equipment, and involves additional risks for workers removing the liners.
  • EP1027934A1 discloses a mill where the outer casing of the mill is made up of at least two components of the casing fixed to each other by fixing elements and removable from each other where a closing element in the outlet of the grinding casing allows the drainage of the grinding media which can be filled into it.
  • the type of gates described in this publication is not applicable to semi-autogenous mills or ball mills, since the gate is constantly hit by the material inside the mill, so it will eventually end up failing due to wear and plastic deformation.
  • prior art technology does not allow draining the mill from any position, but requires rotating the body of the mill to specific positions, which is disadvantageous.
  • a mill drainage system is required that allows liquids to be drained from inside the mill without having to dismantle the interior linings, that does not alter the structure of the mantle of the body of the mill and that is compatible with the shapes of inner linings used in the art.
  • a drainage system is proposed that can be used in conjunction with mill linings with external bolting and would allow not having to remove linings, since it is installed in the same perforations available in the mantle for fastening the pipes.
  • linings generating a fluid connection between the interior of the mill and the exterior of the mill.
  • an elongated drainage device is used that is installed in the free perforations of the mill body, allowing the use of a suction pump or water impulsion to drain more quickly than with conventional methods, it does not require removing linings to the draining operation, and reduces the times of evacuation of water and associated procedures.
  • the proposed drainage system contains components that are easy to replace compared to prior art and can be implemented in all the individual lining elements inside the mill, allowing system availability. proposed drain in whatever position is required. Another advantage in this regard is related to the fact that the proposed invention presents the alternative of being used by evacuation in series, allowing draining from multiple areas of the mill at the same time, which leads to further improvement in evacuation times.
  • the proposed drainage system allows connection to pumps and systems for cleaning, purifying and/or collecting drained water to be reused as required.
  • Figure 1 shows a schematic view in longitudinal section of a mill lining of the state of the art.
  • Figure 2 shows a schematic view in longitudinal section of an exemplary embodiment of the present technology.
  • Figure 3 shows a schematic cross-sectional view of an exemplary embodiment of the present technology showing a drainage device and an anchor bolt.
  • Figure 4 shows a schematic cross-sectional view of an exemplary embodiment of the present technology where two drainage devices can be seen in the same cross section.
  • Figure 5 shows a schematic sectional view of an exemplary embodiment of a drainage device of the present technology.
  • Figure 6 shows a schematic sectional view of various components of an exemplary embodiment of a drainage device of the present technology.
  • Figure 7 shows a schematic sectional view of a mill where multiple drainage devices have been installed at various points around its circumference, where a water extraction system can also be seen using pumps.
  • the present invention describes a drainage system that allows liquids and water to be drained from the interior of semi-autogenous mills, rod mills and ball mills without the need to remove the liners for the draining operation, and which also reduces evacuation times. of water and associated procedures.
  • the present technology takes advantage of pre-existing anchor holes in the shell of the mills, which are commonly used to insert anchor bolts that hold the interior linings of the mill. Usually the mantle of the mill body has more anchor holes than those required to support the linings. It is in these additional anchor holes that the present technology introduces a drainage device comprising an elongated and hollowed-out drainage body that fluidly connects the interior of the mill with the exterior.
  • the drainage bodies are inserted into the anchoring holes of the mill body and are fastened to the interior linings by means of threaded connections at a first end of the drainage body, these connections being the same ones used to insert the bolts that hold the drainage bodies.
  • inner linings that is, they can be the fastening nuts of the mill linings.
  • the drainage bodies also comprise a clamping area that is outside the mantle of the mill body that can have a hexagonal cross section , triangular, square, pentagonal, other regular polygon shape or shape with opposite parallel faces, this section allows to hold the drain body using wrenches or other tools.
  • the drainage devices include a lid, plug or plug cover that is coupled to a second end of the drainage body, which closes the external outlet of the drainage body.
  • the plug cover is attached to a second threaded end next to the fastening area and it is in this same second threaded end where different types of couplings can also be connected to connect hoses and hydraulic pumps directly to the drainage body, allowing for better extraction. of fluids and allowing them to be redirected towards containers or towards operations where water or liquids can be reused.
  • the plug cover may have a hexagonal, triangular, square, pentagonal, other regular polygonal shape, or shape with opposite parallel faces for ease of installation and removal.
  • the second end of the drainage bodies comprises connection means other than threaded connections, allowing hoses or ducts to be coupled.
  • the mill linings comprise one or more drainage perforations that open out at the end of the drainage body located inside the mill.
  • employing two or more drain perforations improves drainage of liquid or water from the inside the mill, because in case any of the perforations are covered by stones, ground material, or other, the uncovered perforations allow to continue draining through the drainage body.
  • the cavity of the body is cleaned drainage using brushes, scrapers or inserting rods.
  • an elongated interior body with a substantially similar or equivalent shape to that of the interior of the cavity is introduced inside it, thus preventing material from accumulating in the cavity, reducing clogging and reducing drainage times.
  • the inner body is coupled with the stopper cover, and may even form a single body.
  • Another of the advantages provided by this system is that it allows the water extracted from the mill to be channeled and redirected to reuse it in another activity, thereby reducing the amount of water required throughout the operation of a mill.
  • FIG 1 a schematic view in longitudinal section of a mill lining system of the state of the art is shown, where a mill lining 200 is observed attached to a mill body 300 by means of fastening bolts 203 installed through anchor holes 301 .
  • a mill lining 200 is observed attached to a mill body 300 by means of fastening bolts 203 installed through anchor holes 301 .
  • to drain the interior of the mills some of the mill linings 200 must be removed, extracting the anchor bolts 203 and introducing equipment and people inside the mill body 300 still loaded with rocks, water, mud and grinding elements such as balls or steel bars.
  • This type of drainage operations are considered high risk, since the personnel must enter a dark closed chamber with slippery surfaces where they also tend to detach rocks from the linings located in the upper part of the mantle of the mill body 300.
  • Figure 2 shows a schematic view in longitudinal section of an exemplary embodiment of the present technology, where a drainage device 100 is observed installed in one of the anchor holes 301 that were previously kept empty, allowing fluid connection between the interior and exterior of the mill body 300 through drainage perforations 201, without the need to structurally modify the mill body 300 and without the need to loosen or remove mill liners 200.
  • FIG. 3 a schematic cross-sectional view of an exemplary embodiment of the present technology is shown showing a drainage device 100 and an anchor bolt 203 connected to clamping nuts 202 of the mill lining 200.
  • the mill lining 200 associated with the present technology can have multiple drainage perforations 201, which can lead to a drainage device 100 or to an anchor bolt 203, which allows one or more to be used, as necessary.
  • more 203 anchor bolts can be replaced by 100 drainage devices to reduce drainage times.
  • the load stress to which the mill linings 200 are subjected increases, it is possible to replace drainage devices 100 with anchor bolts 203 to improve the holding of the mill lining 200, improving safety and reducing the probability of a coating coming off.
  • the drainage devices are installed using washers 204 like those usually used in anchor bolts 203.
  • FIG 4 shows a schematic cross-sectional view of an exemplary embodiment of the present technology where two drainage devices 100 can be seen in the same cross section. It is also observed that some drainage devices also include an internal body 106 that prevents clogging inside the drainage device 100, which allows the interior of the mill to be drained more quickly, since in drainage devices that do not have an internal body 106 Interior cleaning may be necessary before using the drainage system. Finally, it is also noted that the drainage perforations 201 can have an inclination or an inclined section with respect to the central axis of the drainage devices 100 to prevent liquids from settling inside the mill.
  • Figure 5 shows a schematic view in section of an exemplary embodiment of a drainage device 100 of the present technology where two or more drainage perforations 201 are included, which allows improving the drainage of liquids from the inside. of the mill, because in the event that a rock, mud or other material clogs one of the drainage holes 201, it will still be possible to drain the water through the drainage device 100 since the liquids will continue to flow through the drainage holes 201 that are kept uncovered.
  • Figure 5 also shows how the plug cover 108 engages with a second threaded end 104, leaving free access for manipulation of the fastening area 105.
  • Figure 6 shows a schematic sectional view of various components of an exemplary embodiment of a drainage device of the present technology.
  • FIG 6(a) an exemplary embodiment of the drainage device 100 of the present technology is observed, while figure 6(b) shows the general shape of the drainage body 101 and indicates the position of a first threaded end 103 which is the one that engages with the threaded surface of the fastening nuts 202 of the aforementioned mill liners. Also noted is cavity 102, which may have a circular or polygonal cross section to facilitate insertion of an inner body 106.
  • figure 6 (c) shows an inner body 106 that can also include an inner seal 107 that seals the space between the inner body 106 and the cavity 102 to prevent liquids from entering said space and to prevent the entry of sludge and solid materials, reducing clogging and facilitating mill drainage.
  • Figure 6 (d) shows a plug cover 108 with a threaded connection inside, where the larger threaded connection is used to connect the plug cover 108 to the threaded end 104, while the smaller threaded connection allows a detachable inner body 106 to be coupled.
  • the threaded connections can have their helical orientation in the same direction, but preferably they have opposite directions between them.
  • the plug cover 108 can also contain an outer seal 109 in the shape of a ring that allows sealing the space between the plug cover 108 and the edge of the threaded end 104 of the drain body 101 .
  • Figure 6(e) illustrates an alternative embodiment of the present technology, where the plug cover 108 and the inner body 106 are united in a single body.
  • Figure 7 shows a schematic sectional view of a stopped mill, where it can be seen that the material inside the mill separates into two main phases, in the upper part remains a phase made up mainly of grinding liquid 302 formed by water and grinding fluids, and a second denser phase in the lower part formed by the solid grinding material that settles in the form of solid elements, sludge, water and grinding liquids.
  • Figure 7 also shows an exemplary embodiment where multiple drainage devices 100 have been installed at various points around the circumference of the mill body 300, which allows the drainage system to be used in any rotation position of the mill, eliminating the need to rotate the mill body to specific positions to drain.
  • one or more drain devices 100 located below the grinding liquid level 302 may be uncovered to allow fluids and water within the mill to be drained out by the action of the mill. the force of gravity.
  • drain devices 100 located below the grinding liquid level 302 can also be connected to hoses 304 to direct the extracted fluids and water, where in an alternative embodiment of the present technology, the hoses can be connected to 305 pumps that allow to reduce the times required to drain the fluids and water from inside the mill.
  • the hoses can be connected to 305 pumps that allow to reduce the times required to drain the fluids and water from inside the mill.
  • two or more hoses 304 are connected to each other by a connector 306 that is in fluid connection with one or more pumps 305 to reduce the times required to drain fluids and water from inside the mill.
  • any of the drainage devices 100 located below the grinding liquid level 302 can be connected to pumps 305, it has been observed that the extraction of the fluids and the water inside the mill by means of pumps is carried out more quickly when the pumps 305 connect fluidly with drainage devices 100 that are located above the level of accumulated grinding material 303 .
  • the present technology refers to a drainage system for draining liquids from inside a mill body 300 comprising: a mill lining 200 with at least one fastening nut 202 and at least one drainage perforation 201, wherein the mill liner 200 is positioned on the inner surface of the mill body 300; at least one drainage device 100 comprising a drainage body 101 that passes through the mill body 300, wherein the drainage body 101 has a cavity 102, a first threaded end 103 that engages with the clamping nut 202, a clamping zone 105 located on the outside of the mill body 300; and a plug cover 108 that fits into a second end 104 of the drainage body 101; wherein the cavity 102 of each drainage body 101 is in fluid connection with the at least one drainage perforation 201 .
  • the drainage device further comprises a removable inner body 106 that is housed in the cavity 102 of the drainage body.
  • the inner body 106 is coupled to the plug cover 108.
  • the inner body 106 and the stopper cover 108 form a single body.
  • the inner body 106 further comprises an inner seal 107 and the plug cover 108 further comprises an outer seal 109.
  • the second end 104 is a threaded end.
  • the second end 104 further comprises a hose coupling.
  • the clamping zone 105 has a hexagonal, triangular, square, pentagonal, regular polygonal, or a shape with opposite parallel faces.
  • the present technology refers to a drainage method for draining liquids from inside a mill body 300 comprising the steps of: providing in the mill body 300 at least one drainage device 100 comprising a body drainage 101 passing through the mill body 300, wherein the drainage body 101 has a cavity 102, a first threaded end 103, a second end 104 and a clamping area 105 adjacent to the second end 104; and a stopper cover 108 that is coupled to the second end 104 of the drainage body 101; wherein the cavity 102 fluidly connects the inside of the mill body with the outside; removing the plug cover 108 from at least one of the drainage devices 100 in the lower quadrant of the mantle of the mill; and drain the liquids from inside the mantle of the mill.
  • the step of removing the plug cover 108 further comprises cleaning and uncovering the interior cavity 102. In another embodiment of the present technology, the step of removing the stopper cover 108 further comprises removing a removable inner body 106 that is housed in the cavity of the drainage body 101 .
  • the plug cover 108 after removing the plug cover 108, it further comprises the step of connecting a hydraulic pump 305 in fluid connection with the at least one drainage hole 201 through the second end 104 of the drainage body 101; and wherein the step of draining the liquids further comprises activating the hydraulic pump 305 to suck the liquids.
  • the step of removing the plug cover 108 further comprises rotating the mill mantle locating the drainage device 100 in the lower quadrant of the mill mantle.
  • the present technology was used in tests to drain liquids from within a ball mill at a mining facility. From the mill stoppage operation records, it can be seen that, using the conventional methodology that includes removing some linings from the mill, the drainage operation took between 10 and 12 hours, taking an average of 11.2 hours.
  • the mill in question had 208 drainage devices installed around the entire perimeter of the mill. Subsequently, the time required to drain the liquids inside was timed using only the force of gravity, observing that the drainage operation took between 7 and 9 hours, taking an average of 7.9 hours.
  • the present technology reduces the average time required for the draining operation by 29.5%, draining only by gravity with 208 drainage devices distributed around the perimeter of the mill and by 85.7 % when used together with hydraulic pumps, in addition to allowing the draining operation to be carried out without the need for personnel to enter the mill and without the need to remove lining plates.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

The present invention relates to a device, system and method that allow liquids to be drained from inside mills without needing to dismantle the interior liners.

Description

DISPOSITIVO, SISTEMA Y MÉTODO PARA DRENAR LÍQUIDOS DESDE EL INTERIOR DE MOLINOS DEVICE, SYSTEM AND METHOD FOR DRAINING LIQUIDS FROM THE INTERIOR OF MILLS
CAMPO DE LA INVENCIÓN FIELD OF THE INVENTION
La presente invención se relaciona con la industria de la minería. En particular, la presente invención se relaciona con un dispositivo, sistema y método que permite drenar los líquidos desde el interior de los molinos sin necesidad de desmontar los revestimientos interiores. The present invention relates to the mining industry. In particular, the present invention relates to a device, system and method that allows liquids to be drained from inside the mills without the need to dismantle the interior linings.
ESTADO DEL ARTE STATE OF THE ART
Actualmente en la industria de la minería, específicamente en los molinos semi autógenos (SAG) y en los molinos de bolas, se debe evacuar el agua al interior de los molinos al realizar las mantenciones, paradas de emergencia o detenciones programadas, de modo de mejorar las condiciones de seguridad y limpieza para el trabajo del personal y equipos utilizados. Currently in the mining industry, specifically in semi-autogenous mills (SAG) and ball mills, the water must be evacuated inside the mills when carrying out maintenance, emergency stops or scheduled stops, in order to improve the safety and cleanliness conditions for the work of the personnel and equipment used.
En la actualidad, el drenaje de agua se hace retirando algunos revestimientos interiores del molino para destapar las perforaciones de anclaje en el cuerpo del molino, de modo que el agua escurre a través de las perforaciones por la acción de la fuerza de gravedad. El procedimiento descrito es de alto riesgo, pues requiere que operarios y maquinaria ingresen al interior del molino para remover los revestimientos, siendo que en el interior del molino hay rocas, elementos de molienda mezclados con agua y barro, por lo que los trabajadores y maquinarias corren riesgo de resbalar o ser golpeados por rocas y elementos de molienda que se deslizan o se desprenden desde la parte superior del cuerpo del molino. Este procedimiento requiere tiempo extra valioso, procedimientos con maniobras y equipos adicionales e involucra riesgos adicionales para los trabajadores a cargo de retirar los revestimientos. At present, the drainage of water is done by removing some interior linings of the mill to uncover the anchoring holes in the body of the mill, so that the water drains through the holes by the action of gravity. The procedure described is high risk, since it requires operators and machinery to enter the interior of the mill to remove the linings, since inside the mill there are rocks, grinding elements mixed with water and mud, so the workers and machinery are at risk of slipping or being struck by rocks and grinding media that slide or fall from the top of the mill body. This procedure requires valuable extra time, additional maneuvering procedures and equipment, and involves additional risks for workers removing the liners.
En el estado del arte se han encontrado diversas alternativas, que resuelven de manera parcial el problema técnico planteado. Various alternatives have been found in the state of the art, which partially solve the technical problem posed.
Dentro de lo conocido está la publicación EP1027934A1 , que divulga un molino donde la cubierta exterior de la carcasa del molino está formada por al menos dos componentes de la carcasa fijados entre sí por elementos de fijación y desmontables entre sí en donde un elemento de cierre en la salida de la carcasa de molienda permite el drenaje de los medios de molienda que pueden ser llenados en esto. Sin embargo, el tipo de compuertas descritos en esta publicación no es aplicable a molinos semi- autógenos ni molinos de bolas, pues la compuerta es golpeada constantemente por el material al interior del molino, por lo que eventualmente terminará fallando por desgaste y deformación plástica. Adicionalmente se observa que la tecnología del arte previo no permite drenar el molino desde cualquier posición, sino que requiere rotar el cuerpo del molino hacia posiciones específicas, lo cual es desventajoso. Within what is known is the publication EP1027934A1, which discloses a mill where the outer casing of the mill is made up of at least two components of the casing fixed to each other by fixing elements and removable from each other where a closing element in the outlet of the grinding casing allows the drainage of the grinding media which can be filled into it. However, the type of gates described in this publication is not applicable to semi-autogenous mills or ball mills, since the gate is constantly hit by the material inside the mill, so it will eventually end up failing due to wear and plastic deformation. Additionally it is noted that prior art technology does not allow draining the mill from any position, but requires rotating the body of the mill to specific positions, which is disadvantageous.
Otro documento es la publicación US3001730A, que divulga un molino esférico en lugar de un tambor o un tipo cilindrico, y al tener dos secciones duplicadas dispuestas para ser unidas para completar el recinto del molino con cada sección que comprende un conjunto integral de porciones de carcasa y revestimiento, en donde se incluye un orificio de drenaje con revestimiento interior y una bisagra. Sin embargo, este tipo de compuertas no son compatibles con los revestimientos de molino requeridos en molinos semi-autógenos ni en molinos de bolas y es un elemento directamente expuesto al desgaste causado por el material al interior del molino, por lo que la compuerta termina fallando por desgaste y deformación plástica. Adicionalmente se observa que la tecnología del arte previo no permite drenar el molino desde cualquier posición, sino que requiere rotar el cuerpo del molino hacia posiciones específicas, lo cual es desventajoso. Another document is publication US3001730A, which discloses a spherical mill instead of a drum or cylindrical type, and having two duplicate sections arranged to be joined to complete the mill enclosure with each section comprising an integral set of shell portions. and liner, including a weep hole with inner liner and a hinge. However, this type of gate is not compatible with the mill linings required in semi-autogenous mills or ball mills and is an element directly exposed to wear caused by the material inside the mill, which is why the gate ends up failing. due to wear and plastic deformation. Additionally it is noted that prior art technology does not allow draining the mill from any position, but requires rotating the body of the mill to specific positions, which is disadvantageous.
Para subsanar el problema planteado, se requiere de un sistema de drenaje para molino que permita drenar los líquidos desde el interior del molino sin necesidad de desmontar los revestimientos interiores, que no altere la estructura del manto del cuerpo del molino y que sea compatible con las formas de revestimientos interiores utilizadas en la técnica. To correct the problem, a mill drainage system is required that allows liquids to be drained from inside the mill without having to dismantle the interior linings, that does not alter the structure of the mantle of the body of the mill and that is compatible with the shapes of inner linings used in the art.
DESCRIPCION RESUMIDA DE LA INVENCIÓN SUMMARY DESCRIPTION OF THE INVENTION
En vista de lo anterior se propone un sistema de drenaje que se puede usar en conjunto con los revestimientos de molino con empernado exterior y permitiría no tener que retirar revestimientos, ya que se instala en las mismas perforaciones disponibles en el manto para la sujeción de los revestimientos, generando una conexión fluida entre el interior del molino y el exterior del molino. Para lograr esto, se emplea un dispositivo de drenaje alargado que se instala en las perforaciones libres del cuerpo de molino, permitiendo utilizar una bomba de succión o impulsión de agua para realizar el drenado más rápidamente que con los métodos convencionales, no requiere retirar revestimientos para la operación de drenado, y reduce los tiempos de evacuación de agua y de los procedimientos asociados. In view of the above, a drainage system is proposed that can be used in conjunction with mill linings with external bolting and would allow not having to remove linings, since it is installed in the same perforations available in the mantle for fastening the pipes. linings, generating a fluid connection between the interior of the mill and the exterior of the mill. To achieve this, an elongated drainage device is used that is installed in the free perforations of the mill body, allowing the use of a suction pump or water impulsion to drain more quickly than with conventional methods, it does not require removing linings to the draining operation, and reduces the times of evacuation of water and associated procedures.
El sistema de drenaje propuesto contiene componentes de fácil reemplazo en comparación al arte previo y se puede implementar en todos los elementos de revestimiento individual del interior del molino permitiendo una disponibilidad del sistema de drenaje propuesto en cualquier posición que se requiera. Otra ventaja al respecto tiene relación con que la invención propuesta presenta la alternativa de ser utilizada mediante evacuación en serie, permitiendo drenar desde múltiples zonas del molino en un mismo tiempo lo cual conlleva a mejorar aún más los tiempos de evacuación. The proposed drainage system contains components that are easy to replace compared to prior art and can be implemented in all the individual lining elements inside the mill, allowing system availability. proposed drain in whatever position is required. Another advantage in this regard is related to the fact that the proposed invention presents the alternative of being used by evacuation in series, allowing draining from multiple areas of the mill at the same time, which leads to further improvement in evacuation times.
Adicionalmente, el sistema de drenaje propuesto permite conectarse a bombas y sistemas de limpieza, purificación y/o acopio del agua drenada para ser reutilizada según sea requerido. Additionally, the proposed drainage system allows connection to pumps and systems for cleaning, purifying and/or collecting drained water to be reused as required.
DESCRIPCIÓN DE LAS FIGURAS DESCRIPTION OF THE FIGURES
La Figura 1 muestra una vista esquemática en corte longitudinal de un revestimiento de molino del estado de la técnica. Figure 1 shows a schematic view in longitudinal section of a mill lining of the state of the art.
La Figura 2 muestra una vista esquemática en corte longitudinal de una realización ejemplar de la presente tecnología. Figure 2 shows a schematic view in longitudinal section of an exemplary embodiment of the present technology.
La Figura 3 muestra una vista esquemática en corte transversal de una realización ejemplar de la presente tecnología en donde se aprecia un dispositivo de drenaje y un perno de anclaje. Figure 3 shows a schematic cross-sectional view of an exemplary embodiment of the present technology showing a drainage device and an anchor bolt.
La Figura 4 muestra una vista esquemática en corte transversal de una realización ejemplar de la presente tecnología en donde se aprecian dos dispositivos de drenaje en una misma sección transversal. Figure 4 shows a schematic cross-sectional view of an exemplary embodiment of the present technology where two drainage devices can be seen in the same cross section.
La Figura 5 muestra una vista esquemática en corte de una realización ejemplar de un dispositivo de drenaje la presente tecnología. Figure 5 shows a schematic sectional view of an exemplary embodiment of a drainage device of the present technology.
La Figura 6 muestra una vista esquemática en corte de diversos componentes de una realización ejemplar de un dispositivo de drenaje la presente tecnología. Figure 6 shows a schematic sectional view of various components of an exemplary embodiment of a drainage device of the present technology.
La Figura 7 muestra una vista esquemática en corte de un molino en donde se han instalado diversos puntos de su circunferencia múltiples dispositivos de drenaje, en donde además se aprecia un sistema de extracción de agua mediante bombas. Figure 7 shows a schematic sectional view of a mill where multiple drainage devices have been installed at various points around its circumference, where a water extraction system can also be seen using pumps.
DESCRIPCION DETALLADA DE LA INVENCIÓN DETAILED DESCRIPTION OF THE INVENTION
La presente invención describe un sistema de drenaje que permite drenar líquidos y agua desde el interior de los molinos semi-autógenos, molinos de barras y molinos de bolas sin necesitar retirar los revestimientos para la operación de drenado, y que además reduce los tiempos de evacuación de agua y de los procedimientos asociados. Para lograr esto, la presente tecnología aprovecha las perforaciones de anclaje preexistentes en el cuerpo de los molinos, las cuales se utilizan habitualmente para introducir pernos de anclaje que sujetan los revestimientos interiores del molino. Habitualmente el manto del cuerpo de molino posee más perforaciones de anclaje que las requeridas para sostener los revestimientos. Es en estas perforaciones de anclaje adicionales donde la presente tecnología introduce un dispositivo de drenaje que comprende un cuerpo de drenaje alargado y ahuecado que conecta fluidamente el interior del molino con el exterior. The present invention describes a drainage system that allows liquids and water to be drained from the interior of semi-autogenous mills, rod mills and ball mills without the need to remove the liners for the draining operation, and which also reduces evacuation times. of water and associated procedures. To achieve this, the present technology takes advantage of pre-existing anchor holes in the shell of the mills, which are commonly used to insert anchor bolts that hold the interior linings of the mill. Usually the mantle of the mill body has more anchor holes than those required to support the linings. It is in these additional anchor holes that the present technology introduces a drainage device comprising an elongated and hollowed-out drainage body that fluidly connects the interior of the mill with the exterior.
Los cuerpos de drenaje se introducen en las perforaciones de anclaje del cuerpo del molino y se sujetan a los revestimientos interiores mediante conexiones rocadas en un primer extremo del cuerpo de drenaje, pudiendo ser estas conexiones las mismas que se usan para introducir los pernos que sujetan los revestimientos interiores, es decir, pueden ser las tuercas de sujeción de los revestimientos de molino. The drainage bodies are inserted into the anchoring holes of the mill body and are fastened to the interior linings by means of threaded connections at a first end of the drainage body, these connections being the same ones used to insert the bolts that hold the drainage bodies. inner linings, that is, they can be the fastening nuts of the mill linings.
Por otro lado, para poder sujetar los cuerpos de drenaje se debe aplicar torque sobre los cuerpos de drenaje, para ello los cuerpos de drenaje además comprenden una zona de sujeción que queda por fuera del manto del cuerpo de molino que puede tener una sección transversal hexagonal, triangular, cuadrada, pentagonal, otra forma de polígono regular o bien forma con caras opuestas paralelas, esta sección permite sujetar el cuerpo de drenaje empleando llaves u otras herramientas. On the other hand, to be able to hold the drainage bodies, torque must be applied to the drainage bodies, for this purpose the drainage bodies also comprise a clamping area that is outside the mantle of the mill body that can have a hexagonal cross section , triangular, square, pentagonal, other regular polygon shape or shape with opposite parallel faces, this section allows to hold the drain body using wrenches or other tools.
Para evitar que los líquidos salgan del interior del molino a través del dispositivo de drenaje durante la operación normal del molino, los dispositivos de drenaje incluyen una tapa, tapón o cubierta tapón que se acopla a un segundo extremo de cuerpo de drenaje, el cual cierra la salida exterior del cuerpo de drenaje. La cubierta tapón se acopla en un segundo extremo roscado junto a la zona de sujeción y es en este mismo segundo extremo roscado donde además se pueden conectar diferentes tipos de coplas para acoplar mangueras y bombas hidráulicas directamente en el cuerpo de drenaje, permitiendo mejorar la extracción de fluidos y permitiendo redirigirlos hacia contenedores u hacia operaciones donde el agua o líquidos puedan ser reutilizados. La cubierta tapón puede tener una sección transversal hexagonal, triangular, cuadrada, pentagonal, otra forma de polígono regular o bien forma con caras opuestas paralelas para facilitar su instalación y extracción. In order to prevent liquids from leaving the interior of the mill through the drainage device during normal operation of the mill, the drainage devices include a lid, plug or plug cover that is coupled to a second end of the drainage body, which closes the external outlet of the drainage body. The plug cover is attached to a second threaded end next to the fastening area and it is in this same second threaded end where different types of couplings can also be connected to connect hoses and hydraulic pumps directly to the drainage body, allowing for better extraction. of fluids and allowing them to be redirected towards containers or towards operations where water or liquids can be reused. The plug cover may have a hexagonal, triangular, square, pentagonal, other regular polygonal shape, or shape with opposite parallel faces for ease of installation and removal.
En otras modalidades de la presente invención, el segundo extremo de los cuerpos de drenaje comprende medios de conexión distintos de las conexiones roscadas, permitiendo acoplar mangueras o ductos. In other embodiments of the present invention, the second end of the drainage bodies comprises connection means other than threaded connections, allowing hoses or ducts to be coupled.
Para mejorar el funcionamiento del sistema, los revestimientos de molino comprenden una o más perforaciones de drenaje que desembocan en el extremo del cuerpo de drenaje ubicado en el interior del molino. En una modalidad alternativa, al emplear dos o más perforaciones de drenaje se mejora el drenaje del líquido o agua del interior del molino, pues en caso de que alguna de las perforaciones se tape por efecto de piedras, material molido, u otro, las perforaciones destapadas permiten continuar drenando a través del cuerpo de drenaje. To improve the operation of the system, the mill linings comprise one or more drainage perforations that open out at the end of the drainage body located inside the mill. In an alternative embodiment, employing two or more drain perforations improves drainage of liquid or water from the inside the mill, because in case any of the perforations are covered by stones, ground material, or other, the uncovered perforations allow to continue draining through the drainage body.
Empleando el sistema descrito, al momento de drenar los líquidos del interior del molino ya no es necesario introducir personal al molino ni tampoco se requiere desmontar los revestimientos interiores, los cuales pueden llegar a pesar vahas toneladas cada uno, sino que se puede realizar toda la operación desde el exterior. Para esto, se debe retirar la tapa o cubierta tapón de los dispositivos de drenaje y luego de deben orientar los dispositivos de drenaje hacia el cuadrante inferior del molino, entonces es posible drenar el agua a través de los dispositivos de drenaje empleando la fuerza de gravedad o bien accionando bombas hidráulicas de succión o impulsión. Using the described system, when draining the liquids inside the mill, it is no longer necessary to introduce personnel into the mill, nor is it necessary to dismantle the interior linings, which can weigh several tons each, but rather all the cleaning can be done. operation from abroad. For this, the lid or plug cover of the drainage devices must be removed and after the drainage devices must be oriented towards the lower quadrant of the mill, then it is possible to drain the water through the drainage devices using the force of gravity. or by driving suction or impulsion hydraulic pumps.
Dependiendo del material de molienda es posible que partículas finas se introduzcan al interior de la cavidad del cuerpo de drenaje, pudiendo incluso tapar la vía de salida de los líquidos, por lo que al retirar la cubierta tapón se realiza una limpieza de la cavidad del cuerpo de drenaje utilizando escobillas, raspadores o introduciendo varillas. En otras realizaciones, para evitar el taponamiento de la cavidad del cuerpo de drenaje se introduce en su interior un cuerpo interior alargado con forma sustancialmente similar o equivalente a la del interior de la cavidad, evitando de este modo que se acumule material en la cavidad, reduciendo el taponamiento y reduciendo los tiempos de drenaje. En otras realizaciones ejemplares el cuerpo interior está acoplado con la cubierta tapón, pudiendo incluso formar un único cuerpo. Depending on the grinding material, it is possible that fine particles enter the interior of the cavity of the drainage body, and may even block the outlet of the liquids, so when removing the plug cover, the cavity of the body is cleaned drainage using brushes, scrapers or inserting rods. In other embodiments, to prevent clogging of the cavity of the drainage body, an elongated interior body with a substantially similar or equivalent shape to that of the interior of the cavity is introduced inside it, thus preventing material from accumulating in the cavity, reducing clogging and reducing drainage times. In other exemplary embodiments, the inner body is coupled with the stopper cover, and may even form a single body.
Otra de las ventajas que otorga el presente sistema, es que permite canalizar y redirigir el agua extraída del molino para reutilizarla en otra actividad, permitiendo de esta manera reducir la cantidad de agua requerida a lo largo de la operación de un molino Another of the advantages provided by this system is that it allows the water extracted from the mill to be channeled and redirected to reuse it in another activity, thereby reducing the amount of water required throughout the operation of a mill.
Con referencia a la figura 1 , se muestra una vista esquemática en corte longitudinal de un sistema de revestimiento de molino del estado de la técnica, en donde se observa un revestimiento de molino 200 sujetado a un cuerpo de molino 300 mediante pernos de sujeción 203 instalados a través de perforaciones de anclaje 301 . En las tecnologías como la ¡lustrada en la figura 1 , para drenar el interior de los molinos se deben retirar algunos de los revestimientos de molino 200, extrayendo los pernos de anclaje 203 e introduciendo equipos y personas al interior del cuerpo de molino 300 aún cargado con rocas, agua, lodos y elementos de molienda como bolas o barras de acero. Este tipo de operaciones de drenaje se consideran de alto riesgo, pues el personal debe ingresar a una cámara cerrada oscura con superficies resbaladizas en donde además suelen desprenderse rocas desde los revestimientos ubicados en la parte superior del manto del cuerpo de molino 300. With reference to figure 1, a schematic view in longitudinal section of a mill lining system of the state of the art is shown, where a mill lining 200 is observed attached to a mill body 300 by means of fastening bolts 203 installed through anchor holes 301 . In technologies such as the one illustrated in figure 1, to drain the interior of the mills, some of the mill linings 200 must be removed, extracting the anchor bolts 203 and introducing equipment and people inside the mill body 300 still loaded with rocks, water, mud and grinding elements such as balls or steel bars. This type of drainage operations are considered high risk, since the personnel must enter a dark closed chamber with slippery surfaces where they also tend to detach rocks from the linings located in the upper part of the mantle of the mill body 300.
En contraste a lo anterior, en la figura 2 muestra una vista esquemática en corte longitudinal de una realización ejemplar de la presente tecnología, en donde se observa un dispositivo de drenaje 100 instalado en una de las perforaciones de anclaje 301 que anteriormente se mantenían vacías, permitiendo la conexión fluida entre el interior y el exterior del cuerpo de molino 300 a través de perforaciones de drenaje 201 , sin necesidad de modificar estructuralmente el cuerpo de molino 300 y sin necesidad de soltar o retirar revestimientos de molino 200. In contrast to the above, Figure 2 shows a schematic view in longitudinal section of an exemplary embodiment of the present technology, where a drainage device 100 is observed installed in one of the anchor holes 301 that were previously kept empty, allowing fluid connection between the interior and exterior of the mill body 300 through drainage perforations 201, without the need to structurally modify the mill body 300 and without the need to loosen or remove mill liners 200.
Con referencia a la figura 3, se muestra una vista esquemática en corte transversal de una realización ejemplar de la presente tecnología en donde se aprecia un dispositivo de drenaje 100 y un perno de anclaje 203 conectados a tuercas de sujeción 202 del revestimiento de molino 200. Se puede apreciar que el revestimiento de molino 200 asociado a la presente tecnología puede tener múltiples perforaciones de drenaje 201 , las que pueden desembocar en un dispositivo de drenaje 100 o en un perno de anclaje 203, lo cual permite que según sea necesario, uno o más pernos de anclaje 203 pueden ser reemplazados por dispositivos de drenaje 100 para reducir los tiempos de drenaje. Del mismo modo, si la solicitación de carga a la que están sometidos los revestimientos de molino 200 aumenta, es posible reemplazar dispositivos de drenaje 100 por pernos de anclaje 203 para mejorar la sujeción del revestimiento de molino 200, mejorando la seguridad y reduciendo la probabilidad de que un revestimiento se desprenda. Adicionalmente, para mejorar la sujeción al molino, los dispositivos de drenaje se instalan empleando golillas 204 como las que habitualmente se emplean en los pernos de anclaje 203. Referring to Figure 3, a schematic cross-sectional view of an exemplary embodiment of the present technology is shown showing a drainage device 100 and an anchor bolt 203 connected to clamping nuts 202 of the mill lining 200. It can be seen that the mill lining 200 associated with the present technology can have multiple drainage perforations 201, which can lead to a drainage device 100 or to an anchor bolt 203, which allows one or more to be used, as necessary. more 203 anchor bolts can be replaced by 100 drainage devices to reduce drainage times. Similarly, if the load stress to which the mill linings 200 are subjected increases, it is possible to replace drainage devices 100 with anchor bolts 203 to improve the holding of the mill lining 200, improving safety and reducing the probability of a coating coming off. Additionally, to improve the attachment to the mill, the drainage devices are installed using washers 204 like those usually used in anchor bolts 203.
Refiriéndonos ahora a la figura 4 muestra una vista esquemática en corte transversal de una realización ejemplar de la presente tecnología en donde se aprecian dos dispositivos de drenaje 100 en una misma sección transversal. También se observa que algunos dispositivos de drenaje además incluyen un cuerpo interior 106 que evita el taponamiento al interior del dispositivo de drenaje 100, lo que permite drenar el interior del molino más rápidamente, pues en los dispositivos de drenaje que no poseen un cuerpo interior 106 puede ser necesario realizar una limpieza interior antes de utilizar el sistema de drenaje. Finalmente, también se observa que las perforaciones de drenaje 201 pueden tener una inclinación o una sección inclinada con respecto al eje central de los dispositivos de drenaje 100 para evitar que queden líquidos aposados al interior del molino. Por otro lado, en la figura 5 muestra una vista esquemática en corte de una realización ejemplar de un dispositivo de drenaje 100 la presente tecnología en donde se incluyen dos o más perforaciones de drenaje 201 , lo que permite mejorar el drenaje de líquidos desde el interior del molino, pues en el caso de que una roca, lodo u otro material obstruya una de las perforaciones de drenaje 201 , aún será posible drenar el agua a través del dispositivo de drenaje 100 pues los líquidos seguirán fluyendo a través de las perforaciones de drenaje 201 que se mantengan destapadas. En la figura 5 también se observa cómo la cubierta tapón 108 se acopla con un segundo extremo 104 roscado, dejando libre el acceso para la manipulación de la zona de sujeción 105. Referring now to figure 4, it shows a schematic cross-sectional view of an exemplary embodiment of the present technology where two drainage devices 100 can be seen in the same cross section. It is also observed that some drainage devices also include an internal body 106 that prevents clogging inside the drainage device 100, which allows the interior of the mill to be drained more quickly, since in drainage devices that do not have an internal body 106 Interior cleaning may be necessary before using the drainage system. Finally, it is also noted that the drainage perforations 201 can have an inclination or an inclined section with respect to the central axis of the drainage devices 100 to prevent liquids from settling inside the mill. On the other hand, Figure 5 shows a schematic view in section of an exemplary embodiment of a drainage device 100 of the present technology where two or more drainage perforations 201 are included, which allows improving the drainage of liquids from the inside. of the mill, because in the event that a rock, mud or other material clogs one of the drainage holes 201, it will still be possible to drain the water through the drainage device 100 since the liquids will continue to flow through the drainage holes 201 that are kept uncovered. Figure 5 also shows how the plug cover 108 engages with a second threaded end 104, leaving free access for manipulation of the fastening area 105.
La figura 6 muestra una vista esquemática en corte de diversos componentes de una realización ejemplar de un dispositivo de drenaje la presente tecnología. Figure 6 shows a schematic sectional view of various components of an exemplary embodiment of a drainage device of the present technology.
En la figura 6 (a) se observa una realización ejemplar del dispositivo de drenaje 100 de la presente tecnología, mientras que la figura 6 (b) se muestra la forma general del cuerpo de drenaje 101 e indica la posición de un primer extremo 103 roscado que es el que se acopla con la superficie roscada de las tuercas de sujeción 202 de los revestimientos de molino antes señalados. También se observa la cavidad 102, la cual puede tener una sección transversal circular o poligonal para facilitar la inserción de un cuerpo interior 106. In figure 6(a) an exemplary embodiment of the drainage device 100 of the present technology is observed, while figure 6(b) shows the general shape of the drainage body 101 and indicates the position of a first threaded end 103 which is the one that engages with the threaded surface of the fastening nuts 202 of the aforementioned mill liners. Also noted is cavity 102, which may have a circular or polygonal cross section to facilitate insertion of an inner body 106.
Por otro lado, la figura 6 (c) muestra un cuerpo interior 106 que además puede incluir un sello interior 107 que sella el espacio entre el cuerpo interior 106 y la cavidad 102 para evitar que líquidos ingresen a dicho espacio y para evitar el ingreso de lodos y materiales sólidos, reduciendo el taponamiento y facilitando el drenaje del molino. On the other hand, figure 6 (c) shows an inner body 106 that can also include an inner seal 107 that seals the space between the inner body 106 and the cavity 102 to prevent liquids from entering said space and to prevent the entry of sludge and solid materials, reducing clogging and facilitating mill drainage.
Por su parte, la figura 6 (d) muestra una cubierta tapón 108 con una conexión roscadas en el interior, en donde la conexión roscada más grande se emplea para conectar la cubierta tapón 108 al extremo roscado 104, mientras que la conexión roscada más pequeña permite acoplar un cuerpo interior 106 desmontable. Las conexiones roscadas pueden tener su orientación helicoidal en un mismo sentido, pero preferentemente tienen sentidos opuestos entre ellas. Se aprecia además que la cubierta tapón 108 además puede contener un sello exterior 109 con forma de anillo que permite sellar el espacio entre la cubierta tapón 108 y el borde del extremo roscado 104 del cuerpo de drenaje 101 . For its part, Figure 6 (d) shows a plug cover 108 with a threaded connection inside, where the larger threaded connection is used to connect the plug cover 108 to the threaded end 104, while the smaller threaded connection allows a detachable inner body 106 to be coupled. The threaded connections can have their helical orientation in the same direction, but preferably they have opposite directions between them. It is also appreciated that the plug cover 108 can also contain an outer seal 109 in the shape of a ring that allows sealing the space between the plug cover 108 and the edge of the threaded end 104 of the drain body 101 .
La figura 6 (e) ¡lustra una realización alternativa de la presente tecnología, en donde la cubierta tapón 108 y el cuerpo interior 106 están unidos en un solo cuerpo. Figure 6(e) illustrates an alternative embodiment of the present technology, where the plug cover 108 and the inner body 106 are united in a single body.
La figura 7 muestra una vista esquemática en corte de un molino detenido, en donde se observa que el material al interior del molino se separa en dos fases principales, en la parte superior queda una fase conformada principalmente por líquido de molienda 302 formada por agua y fluidos de molienda, y una segunda fase más densa en la parte inferior formada por el material de molienda sólido que decanta en forma de elementos sólidos, lodos, agua y líquidos de molienda. Figure 7 shows a schematic sectional view of a stopped mill, where it can be seen that the material inside the mill separates into two main phases, in the upper part remains a phase made up mainly of grinding liquid 302 formed by water and grinding fluids, and a second denser phase in the lower part formed by the solid grinding material that settles in the form of solid elements, sludge, water and grinding liquids.
En la figura 7 además se puede observar una realización ejemplar en donde en diversos puntos de la circunferencia del cuerpo de molino 300 se han instalado múltiples dispositivos de drenaje 100, lo que permite utilizar el sistema de drenaje en cualquier posición de rotación del molino, eliminando la necesidad de rotar el cuerpo de molino a posiciones específicas para drenar. En la realización ¡lustrada en la figura 7, se pueden destapar uno o más dispositivos de drenaje 100 ubicados por debajo del nivel de líquido de molienda 302 para permitir que los fluidos y el agua al interior del molino sean drenados hacia el exterior por acción de la fuerza de gravedad. Figure 7 also shows an exemplary embodiment where multiple drainage devices 100 have been installed at various points around the circumference of the mill body 300, which allows the drainage system to be used in any rotation position of the mill, eliminating the need to rotate the mill body to specific positions to drain. In the embodiment illustrated in Figure 7, one or more drain devices 100 located below the grinding liquid level 302 may be uncovered to allow fluids and water within the mill to be drained out by the action of the mill. the force of gravity.
Aun en referencia a la figura 7, los dispositivos de drenaje 100 ubicados por debajo del nivel de líquido de molienda 302 también se pueden conectar mangueras 304 para dirigir los fluidos y el agua extraídos, en donde en una realización alternativa de la presente tecnología, las mangueras pueden conectarse a bombas 305 que permiten reducir los tiempos requeridos para drenar los fluidos y el agua desde el interior del molino. En una realización preferente, dos o más mangueras 304 se conectan entre si mediante un conector 306 que esta en conexión fluida con una o más bombas 305 para reducir los tiempos requeridos para drenar los fluidos y el agua desde el interior del molino. Si bien cualquiera de los dispositivos de drenaje 100 ubicados por debajo del nivel de líquido de molienda 302 pueden ser conectados a bombas 305, se ha observado que la extracción de los fluidos y el agua al interior del molino mediante bombas se realiza con mayor rapidez cuando las bombas 305 se conectan fluidamente con dispositivos de drenaje 100 que están ubicados por encima del nivel de material de molienda 303 acumulado. Still referring to Figure 7, drain devices 100 located below the grinding liquid level 302 can also be connected to hoses 304 to direct the extracted fluids and water, where in an alternative embodiment of the present technology, the hoses can be connected to 305 pumps that allow to reduce the times required to drain the fluids and water from inside the mill. In a preferred embodiment, two or more hoses 304 are connected to each other by a connector 306 that is in fluid connection with one or more pumps 305 to reduce the times required to drain fluids and water from inside the mill. Although any of the drainage devices 100 located below the grinding liquid level 302 can be connected to pumps 305, it has been observed that the extraction of the fluids and the water inside the mill by means of pumps is carried out more quickly when the pumps 305 connect fluidly with drainage devices 100 that are located above the level of accumulated grinding material 303 .
En una realización preferente, la presente tecnología se refiere a un sistema de drenaje para drenar líquidos desde el interior de un cuerpo de molino 300 que comprende: un revestimiento de molino 200 con al menos una tuerca de sujeción 202 y al menos una perforación de drenaje 201 , en donde el revestimiento de molino 200 se posiciona en la superficie interior del cuerpo del molino 300; al menos un dispositivo de drenaje 100 que comprende un cuerpo de drenaje 101 que atraviesa el cuerpo de molino 300, en donde el cuerpo de drenaje 101 posee una cavidad 102, un primer extremo 103 roscado que se acopla con la tuerca de sujeción 202, una zona de sujeción 105 ubicada en el exterior del cuerpo de molino 300; y una cubierta tapón 108 que se acopla en un segundo extremo 104 del cuerpo de drenaje 101 ; en donde la cavidad 102 de cada cuerpo de drenaje 101 está en conexión fluida con la al menos una perforación de drenaje 201 . In a preferred embodiment, the present technology refers to a drainage system for draining liquids from inside a mill body 300 comprising: a mill lining 200 with at least one fastening nut 202 and at least one drainage perforation 201, wherein the mill liner 200 is positioned on the inner surface of the mill body 300; at least one drainage device 100 comprising a drainage body 101 that passes through the mill body 300, wherein the drainage body 101 has a cavity 102, a first threaded end 103 that engages with the clamping nut 202, a clamping zone 105 located on the outside of the mill body 300; and a plug cover 108 that fits into a second end 104 of the drainage body 101; wherein the cavity 102 of each drainage body 101 is in fluid connection with the at least one drainage perforation 201 .
En una realización de la presente tecnología el dispositivo de drenaje además comprende un cuerpo interior 106 removible que se aloja en la cavidad 102 del cuerpo de drenaje. In an embodiment of the present technology, the drainage device further comprises a removable inner body 106 that is housed in the cavity 102 of the drainage body.
En otra realización de la presente tecnología el cuerpo interior 106 esta acoplado a la cubierta tapón 108. In another embodiment of the present technology the inner body 106 is coupled to the plug cover 108.
En otra realización de la presente tecnología el cuerpo interior 106 y la cubierta tapón 108 forman un único cuerpo. In another embodiment of the present technology the inner body 106 and the stopper cover 108 form a single body.
En otra realización de la presente tecnología el cuerpo interior 106 además comprende un sello interior 107 y la cubierta tapón 108 además comprende un sello exterior 109. In another embodiment of the present technology the inner body 106 further comprises an inner seal 107 and the plug cover 108 further comprises an outer seal 109.
En otra realización de la presente tecnología el segundo extremo 104 es un extremo roscado. In another embodiment of the present technology the second end 104 is a threaded end.
En otra realización de la presente tecnología el segundo extremo 104 además comprende un acople para mangueras. In another embodiment of the present technology the second end 104 further comprises a hose coupling.
En otra realización de la presente tecnología la zona de sujeción 105 tiene una sección transversal hexagonal, triangular, cuadrada, pentagonal, forma de polígono regular o bien una forma con caras opuestas paralelas. In another embodiment of the present technology, the clamping zone 105 has a hexagonal, triangular, square, pentagonal, regular polygonal, or a shape with opposite parallel faces.
En otra realización, la presente tecnología se refiere a un método de drenaje para drenar líquidos desde el interior de un cuerpo de molino 300 que comprende las etapas de: proveer en el cuerpo de molino 300 al menos un dispositivo de drenaje 100 que comprende un cuerpo de drenaje 101 que atraviesa el cuerpo de molino 300, en donde el cuerpo de drenaje 101 posee una cavidad 102, un primer extremo 103 roscado, un segundo extremo 104 y una zona de sujeción 105 adyacente al segundo extremo 104; y una cubierta tapón 108 que se acopla en el segundo extremo 104 del cuerpo de drenaje 101 ; en donde la cavidad 102 conecta fluidamente el interior del cuerpo de molino con el exterior; retirar la cubierta tapón 108 de al menos uno de los dispositivos de drenaje 100 en el cuadrante inferior del manto del molino; y drenar los líquidos desde el interior del manto del molino. In another embodiment, the present technology refers to a drainage method for draining liquids from inside a mill body 300 comprising the steps of: providing in the mill body 300 at least one drainage device 100 comprising a body drainage 101 passing through the mill body 300, wherein the drainage body 101 has a cavity 102, a first threaded end 103, a second end 104 and a clamping area 105 adjacent to the second end 104; and a stopper cover 108 that is coupled to the second end 104 of the drainage body 101; wherein the cavity 102 fluidly connects the inside of the mill body with the outside; removing the plug cover 108 from at least one of the drainage devices 100 in the lower quadrant of the mantle of the mill; and drain the liquids from inside the mantle of the mill.
En otra realización de la presente tecnología la etapa de retirar la cubierta tapón 108 además comprende limpiar y destapar la cavidad interior 102. En otra realización de la presente tecnología la etapa de retirar la cubierta tapón 108 además comprende retirar un cuerpo interior 106 removible que se aloja en la cavidad del cuerpo de drenaje 101 . In another embodiment of the present technology the step of removing the plug cover 108 further comprises cleaning and uncovering the interior cavity 102. In another embodiment of the present technology, the step of removing the stopper cover 108 further comprises removing a removable inner body 106 that is housed in the cavity of the drainage body 101 .
En otra realización de la presente tecnología, después de retirar la cubierta tapón 108 además comprende el paso de conectar una bomba 305 hidráulica en conexión fluida con la al menos una perforación de drenaje 201 a través del segundo extremo 104 del cuerpo de drenaje 101 ; y en donde la etapa de drenar los líquidos además comprende activar la bomba 305 hidráulica para succionar los líquidos. In another embodiment of the present technology, after removing the plug cover 108, it further comprises the step of connecting a hydraulic pump 305 in fluid connection with the at least one drainage hole 201 through the second end 104 of the drainage body 101; and wherein the step of draining the liquids further comprises activating the hydraulic pump 305 to suck the liquids.
En otra realización de la presente tecnología la etapa de retirar la cubierta tapón 108 además comprende rotar el manto del molino ubicando el dispositivo de drenaje 100 en el cuadrante inferior del manto del molino. In another embodiment of the present technology the step of removing the plug cover 108 further comprises rotating the mill mantle locating the drainage device 100 in the lower quadrant of the mill mantle.
EJEMPLO DE APLICACIÓN APPLICATION EXAMPLE
En una realización ejemplar, la presente tecnología se empleó en pruebas para drenar los líquidos desde el interior de un molino de bolas de una instalación minera. De los registros de operación de detenciones del molino se observa que, mediante la metodología convencional que incluye retirar algunos revestimientos del molino, la operación de drenaje tardó entre 10 y 12 horas, tardando en promedio 11 ,2 horas. In an exemplary embodiment, the present technology was used in tests to drain liquids from within a ball mill at a mining facility. From the mill stoppage operation records, it can be seen that, using the conventional methodology that includes removing some linings from the mill, the drainage operation took between 10 and 12 hours, taking an average of 11.2 hours.
En un primer conjunto de pruebas, en el molino en cuestión se instalaron 208 dispositivos de drenaje en todo el perímetro del molino. Posteriormente se cronometró el tiempo requerido para drenar los líquidos del interior utilizando solo la fuerza de gravedad, observándose que la operación de drenaje tardó entre 7 y 9 horas, tardando en promedio 7,9 horas. In a first set of tests, the mill in question had 208 drainage devices installed around the entire perimeter of the mill. Subsequently, the time required to drain the liquids inside was timed using only the force of gravity, observing that the drainage operation took between 7 and 9 hours, taking an average of 7.9 hours.
En un segundo conjunto de pruebas realizada en el mismo molino, se acoplaron bombas hidráulicas que se conectaron en los dispositivos de drenaje y luego se encendieron para succionar más rápidamente los líquidos del interior, observándose que la operación de drenaje tardó entre 1 y 2 horas, tardando en promedio 1 ,6 horas. In a second set of tests carried out in the same mill, hydraulic pumps were connected to the drainage devices and then turned on to more quickly suck the liquids inside, observing that the drainage operation took between 1 and 2 hours. taking an average of 1.6 hours.
Por lo tanto, de este ejemplo se puede observar que la presente tecnología reduce el tiempo promedio requerido por la operación de drenado en 29,5% drenando solo por gravedad con 208 dispositivos de drenaje distribuidos en el perímetro del molino y en un 85,7% cuando se utiliza junto a bombas hidráulicas, además de que permitió realizar la operación de drenado sin necesidad de que el personal hiciera ingreso al molino y sin necesidad de retirar placas de revestimiento. Therefore, from this example it can be seen that the present technology reduces the average time required for the draining operation by 29.5%, draining only by gravity with 208 drainage devices distributed around the perimeter of the mill and by 85.7 % when used together with hydraulic pumps, in addition to allowing the draining operation to be carried out without the need for personnel to enter the mill and without the need to remove lining plates.
NUMEROS DE REFERENCIA Con el fin de clarificar la presente descripción se incorpora a continuación un listado con los componentes de la invención y sus respectivos números de referencia. REFERENCE NUMBERS In order to clarify the present description, a list with the components of the invention and their respective reference numbers is included below.
100 Dispositivo de drenaje 100 drainage device
101 Cuerpo de drenaje 101 Drain body
102 Cavidad 102 cavity
103 Primer Extremo 103 First End
104 Segundo Extremo 104 Second End
105 Zona de sujeción 105 Clamping Zone
106 Cuerpo interior 106 Inner body
107 Sello interior 107 inner seal
108 Cubierta tapón 108 Plug cover
109 Sello exterior 109 Outer Seal
200 Revestimiento de molino 200 mill lining
201 Perforación de drenaje 201 Drainage drilling
202 Tuerca de sujeción 202 Clamping nut
203 Perno de anclaje 203 Anchor bolt
204 Golilla 204 Golilla
300 Cuerpo de molino 300 mill body
301 Perforación de anclaje 301 Anchor Drilling
302 Agua de molienda 302 Grinding water
303 Material en molienda 303 Material in grinding
304 Mangueras 304 Hoses
305 Bomba 305 Bomb
306 Colector 306 collector
Por último, cabe destacar que los distintos parámetros particulares de la invención, como las dimensiones, la elección de materiales, y aspectos específicos de las configuraciones preferidas descritas anteriormente pueden vahar o ser modificadas en función de los requerimientos de operación. En consecuencia, las configuraciones específicas descritas anteriormente no pretenden ser limitantes, y dichas variaciones y/o modificaciones se encuentran dentro del espíritu y alcance de la invención. Finally, it should be noted that the different particular parameters of the invention, such as the dimensions, the choice of materials, and specific aspects of the preferred configurations described above can be varied or modified depending on the operating requirements. Accordingly, the specific configurations described above are not intended to be limiting, and such variations and/or modifications are within the spirit and scope of the invention.

Claims

REIVINDICACIONES
1 - Un sistema de drenaje para drenar líquidos desde el interior de un cuerpo de molino (300) que comprende: un revestimiento de molino (200) con al menos una tuerca de sujeción (202) y al menos una perforación de drenaje (201 ), en donde el revestimiento de molino (200) se posiciona en la superficie interior del cuerpo del molino (300); al menos un dispositivo de drenaje (100) que comprende un cuerpo de drenaje (101 ) que atraviesa el cuerpo de molino (300), en donde el cuerpo de drenaje (101 ) posee una cavidad (102), un primer extremo (103) roscado que se acopla con la tuerca de sujeción (202), una zona de sujeción (105) ubicada en el exterior del cuerpo de molino (300); y una cubierta tapón (108) que se acopla en un segundo extremo (104) del cuerpo de drenaje (101 ); en donde la cavidad (102) de cada cuerpo de drenaje (101 ) está en conexión fluida con la al menos una perforación de drenaje (201 ). 1 - A drainage system for draining liquids from inside a mill body (300) comprising: a mill lining (200) with at least one fastening nut (202) and at least one drainage hole (201) , wherein the mill liner (200) is positioned on the inner surface of the mill body (300); at least one drainage device (100) comprising a drainage body (101) that passes through the mill body (300), wherein the drainage body (101) has a cavity (102), a first end (103) threaded that engages with the clamping nut (202), a clamping zone (105) located on the outside of the mill body (300); and a stopper cover (108) that is coupled to a second end (104) of the drainage body (101); wherein the cavity (102) of each drainage body (101) is in fluid connection with the at least one drainage perforation (201).
2- El sistema de drenaje de acuerdo con la reivindicación 1 en donde el dispositivo de drenaje además comprende un cuerpo interior (106) removible que se aloja en la cavidad (102) del cuerpo de drenaje. 2- The drainage system according to claim 1 wherein the drainage device further comprises a removable inner body (106) that is housed in the cavity (102) of the drainage body.
3- El sistema de drenaje de acuerdo con la reivindicación 2 en donde el cuerpo interior (106) esta acoplado a la cubierta tapón (108). 3- The drainage system according to claim 2 wherein the inner body (106) is coupled to the stopper cover (108).
4- El sistema de drenaje de acuerdo con la reivindicación 2 en donde el cuerpo interior (106) y la cubierta tapón (108) forman un único cuerpo. 4- The drainage system according to claim 2 wherein the inner body (106) and the stopper cover (108) form a single body.
5- El sistema de drenaje de acuerdo con la reivindicación
Figure imgf000014_0001
en donde el cuerpo interior (106) además comprende un sello interior (107) y la cubierta tapón (108) además comprende un sello exterior (109). 5- The drainage system according to claim
Figure imgf000014_0001
wherein the inner body (106) further comprises an inner seal (107) and the plug cover (108) further comprises an outer seal (109).
6- El sistema de drenaje de acuerdo con la reivindicación 1 en donde el segundo extremo (104) es un extremo roscado. 6- The drainage system according to claim 1 wherein the second end (104) is a threaded end.
7- El sistema de drenaje de acuerdo con la reivindicación 1 en donde el segundo extremo (104) además comprende un acople para mangueras. 7- The drainage system according to claim 1 wherein the second end (104) further comprises a coupling for hoses.
8- El sistema de drenaje de acuerdo con la reivindicación 1 en donde la zona de sujeción (105) tiene una sección transversal hexagonal, triangular, cuadrada, pentagonal, forma de polígono regular o bien una forma con caras opuestas paralelas. 8- The drainage system according to claim 1 wherein the clamping area (105) has a hexagonal, triangular, square, pentagonal, regular polygonal cross section or a shape with opposite parallel faces.
9- Un dispositivo de drenaje (100) para drenar líquidos desde el interior de un cuerpo de molino (300) que comprende: un cuerpo de drenaje (101 ) que atraviesa el cuerpo de molino (300), en donde el cuerpo de drenaje (101 ) posee una cavidad (102), un primer extremo (103) roscado, un segundo extremo (104) y una zona de sujeción (105) adyacente al segundo extremo (104); y una cubierta tapón (108) que se acopla en el segundo extremo (104) del cuerpo de drenaje (101 ); en donde la cavidad (102) conecta fluidamente los extremos del cuerpo de drenaje (101 ). 9- A drainage device (100) to drain liquids from inside a mill body (300) comprising: a drainage body (101) that goes through the mill body (300), wherein the drainage body (101) has a cavity (102), a first threaded end (103), a second end (104) and a zone clamp (105) adjacent to the second end (104); and a stopper cover (108) that is coupled to the second end (104) of the drainage body (101); wherein the cavity (102) fluidly connects the ends of the drainage body (101).
10- El dispositivo de drenaje (100) de acuerdo con la reivindicación 9 en donde el dispositivo de drenaje además comprende un cuerpo interior (106) removible que se aloja en la cavidad del cuerpo de drenaje. The drainage device (100) according to claim 9, wherein the drainage device further comprises a removable inner body (106) that is housed in the cavity of the drainage body.
1 1 - El dispositivo de drenaje (100) de acuerdo con la reivindicación 10 en donde el cuerpo interior (106) esta acoplado a la cubierta tapón (108). 1 1 - The drainage device (100) according to claim 10 wherein the inner body (106) is coupled to the plug cover (108).
12- El dispositivo de drenaje (100) de acuerdo con la reivindicación 10 en donde el cuerpo interior (106) y la cubierta tapón (108) forman un único cuerpo. 12- The drainage device (100) according to claim 10, wherein the inner body (106) and the stopper cover (108) form a single body.
13- El dispositivo de drenaje (100) de acuerdo con la reivindicación 9 en donde el segundo extremo (104) es un extremo roscado 13- The drainage device (100) according to claim 9 wherein the second end (104) is a threaded end
14- El dispositivo de drenaje (100) de acuerdo con la reivindicación 9 en donde la zona de sujeción (105) tiene una sección transversal hexagonal, triangular, cuadrada, pentagonal, forma de polígono regular o bien una forma con caras opuestas paralelas. 14- The drainage device (100) according to claim 9, wherein the clamping area (105) has a hexagonal, triangular, square, pentagonal, regular polygonal cross section or a shape with opposite parallel faces.
15- El dispositivo de drenaje (100) de acuerdo con la reivindicación 9 en donde además comprende una golilla (107) adyacente a la zona de sujeción (105). 15- The drainage device (100) according to claim 9 wherein it further comprises a grommet (107) adjacent to the clamping area (105).
16- Un método de drenaje para drenar líquidos desde el interior de un cuerpo de molino (300) que comprende las etapas de: proveer en el cuerpo de molino (300) al menos un dispositivo de drenaje (100) que comprende un cuerpo de drenaje (101 ) que atraviesa el cuerpo de molino (300), en donde el cuerpo de drenaje (101 ) posee una cavidad (102), un primer extremo (103) roscado, un segundo extremo (104) y una zona de sujeción (105) adyacente al segundo extremo (104); y una cubierta tapón (108) que se acopla en el segundo extremo (104) del cuerpo de drenaje (101 ); en donde la cavidad (102) conecta fluidamente el interior del cuerpo de molino con el exterior; retirar la cubierta tapón (108) de al menos uno de los dispositivos de drenaje (100) en el cuadrante inferior del manto del molino; y drenar los líquidos desde el interior del manto del molino. 16- A drainage method for draining liquids from inside a mill body (300) comprising the steps of: providing in the mill body (300) at least one drainage device (100) comprising a drainage body (101) that goes through the mill body (300), where the drainage body (101) has a cavity (102), a first threaded end (103), a second end (104) and a fastening area (105). ) adjacent to the second end (104); and a stopper cover (108) that is coupled to the second end (104) of the drainage body (101); wherein the cavity (102) fluidly connects the inside of the mill body with the outside; remove the plug cover (108) from at least one of the drainage devices (100) in the lower quadrant of the mantle of the mill; and drain the liquids from inside the mantle of the mill.
17- El método de drenaje acuerdo con la reivindicación 16 en donde la etapa de retirar la cubierta tapón (108) además comprende limpiar y destapar la cavidad interior (102). 18- El método de drenaje acuerdo con la reivindicación 16 en donde la etapa de retirar la cubierta tapón (108) además comprende retirar un cuerpo interior (106) removible que se aloja en la cavidad del cuerpo de drenaje (101 ). 17- The drainage method according to claim 16 wherein the step of removing the plug cover (108) further comprises cleaning and uncovering the interior cavity (102). 18- The drainage method according to claim 16, wherein the step of removing the plug cover (108) further comprises removing a removable inner body (106) that is housed in the cavity of the drainage body (101).
19- El método de drenaje acuerdo con la reivindicación 16 en donde después de retirar la cubierta tapón (108) además comprende el paso de conectar una bomba (305) hidráulica en conexión fluida con la al menos una perforación de drenaje (201 ) a través del segundo extremo (104) del cuerpo de drenaje (101 ); y en donde la etapa de drenar los líquidos además comprende activar la bomba (305) hidráulica para succionar los líquidos. 19- The drainage method according to claim 16 wherein after removing the plug cover (108) it also comprises the step of connecting a hydraulic pump (305) in fluid connection with the at least one drainage hole (201) through of the second end (104) of the drainage body (101); and wherein the step of draining the liquids further comprises activating the hydraulic pump (305) to suck the liquids.
20- El método de drenaje acuerdo con la reivindicación 16 en donde la etapa de retirar la cubierta tapón (108) además comprende rotar el manto del molino ubicando el dispositivo de drenaje (100) en el cuadrante inferior del manto del molino. 20- The drainage method according to claim 16 wherein the step of removing the plug cover (108) further comprises rotating the mill mantle locating the drainage device (100) in the lower quadrant of the mill mantle.
PCT/CL2022/050010 2022-01-28 2022-01-28 Device, system and method for draining liquids from inside mills WO2023141730A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0163536A2 (en) * 1984-06-01 1985-12-04 Kawasaki Jukogyo Kabushiki Kaisha Shell structure of heavy-load type rod mill
CN105921225A (en) * 2016-04-26 2016-09-07 株洲市欧华化工机械有限公司 Sand draining method used after emergency stop of horizontal sand mill and large horizontal sand mill
CN207430425U (en) * 2017-11-01 2018-06-01 威海佳美化工有限公司 A kind of sand mill of oil-proof varnish production
CN211359042U (en) * 2019-11-18 2020-08-28 苏州群鹰防腐材料有限公司 Horizontal sand mill of large-traffic coating

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0163536A2 (en) * 1984-06-01 1985-12-04 Kawasaki Jukogyo Kabushiki Kaisha Shell structure of heavy-load type rod mill
CN105921225A (en) * 2016-04-26 2016-09-07 株洲市欧华化工机械有限公司 Sand draining method used after emergency stop of horizontal sand mill and large horizontal sand mill
CN207430425U (en) * 2017-11-01 2018-06-01 威海佳美化工有限公司 A kind of sand mill of oil-proof varnish production
CN211359042U (en) * 2019-11-18 2020-08-28 苏州群鹰防腐材料有限公司 Horizontal sand mill of large-traffic coating

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