WO2020037440A1 - Lifters for use in comminution devices in industrial and mining works - Google Patents
Lifters for use in comminution devices in industrial and mining works Download PDFInfo
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- WO2020037440A1 WO2020037440A1 PCT/CL2019/000028 CL2019000028W WO2020037440A1 WO 2020037440 A1 WO2020037440 A1 WO 2020037440A1 CL 2019000028 W CL2019000028 W CL 2019000028W WO 2020037440 A1 WO2020037440 A1 WO 2020037440A1
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- lifter
- steel
- main body
- main
- lifters
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Classifications
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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
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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
- B02C17/22—Lining for containers
Definitions
- the present invention relates to equipment with induction in industrial and mining operations.
- the present invention relates to equipment coatings (known in the technical area as lifters and referred to hereinafter simply as lifters) which, in addition to protecting their structure, are used as load lifters during the production process and whose technical advantages They allow, among other things, to reduce both the total weight and the number of parts that make up the set of coatings of said equipment, also achieving a significant decrease in maintenance times thanks to the optimization of assembly and disassembly times, maintaining and / or improving the shelf life of the product.
- equipment coatings known in the technical area as lifters and referred to hereinafter simply as lifters
- Comminution equipment such as autogenous or semi-autogenous mills, balls and bars, decreases the size of the material that enters them through the impact and / or abrasion that is generated thanks to its constant rotation. These teams rotate around its axis, generating, in this way, the permanent rubbing and impact between the different components of its load (mainly mineral and steel balls).
- these equipments are provided with an inner lining that, in addition to protecting their structure, is responsible for optimizing the drag, impact and movement of the load in process, thereby efficiently reducing its size.
- part of the inner lining of these comminution equipment corresponds to lifters. Its function during the operation of the mill is to raise the material through its internal walls to the point where gravity manages to separate it from the wall and, as in the case of semi-autogenous mills, propel this material in a parabolic fall in the direction of the lower part of the mill where the rest of the load that is being processed is located, producing, in this way, the necessary impact for the reduction of the size of the treated material.
- the set of coatings constitutes an important part of the weight that the mill rests bear, this being one of the reasons that limit the material processing capacity.
- the greater the weight the more energy consumption is generated during the operation and, to the extent that said set of Coatings are made up of a larger number of pieces, increasing the time required for each maintenance that considers its renewal.
- Wear plates are described as part of the lining of a mill, which comprise an elastomer body, where various grooves and holes are arranged of material discharge.
- an elastomeric block is particularly disclosed which is cast by casting on a support plate and contains a series of discharge holes.
- the technical problem that solves the invention described in said document is related to minimizing the repeated obstruction of the discharge holes of the equipment.
- US Patent 9,475,057 (Cabot Corporation) addresses the problem of minimizing the frequency at which mill liners must be replaced, for which lifters are proposed which include an upper elastomeric layer and a lower elastomeric layer. , of different composition each.
- An objective of the present invention is to provide steel lifters for comminution equipment such as semi-autogenous, ball mills or the like, lighter than those currently used.
- Figure 1 shows a coating mantle section for comminution equipment with prior art lifters, typically employed in the industry.
- Figure 2 is a cross-sectional view of a prior art lifter.
- Figure 3 shows a set of lifters according to an embodiment of the present invention, as they would be arranged in a comminution equipment. The expert will understand that this assembly forms a portion of the liner of lifters that are arranged in a comminution equipment.
- Figure 4 is a top perspective view of a lifter according to an embodiment of the present invention.
- Figure 5 is a bottom perspective view of a lifter according to an embodiment of the present invention, where the portion of steel with cavities in its lower face is shown.
- Figure 6 is a bottom perspective view of a lifter according to another embodiment of the present invention, where the rubber-coated steel portion is appreciated.
- Figure 7a illustrates the cross section of lifters in accordance with an exemplary embodiment of the present invention.
- Figure 7b illustrates the cross section of a lifter according to another exemplary embodiment of the present invention.
- Figure 7c illustrates the cross section of lifters in accordance with yet another exemplary embodiment of the present invention.
- Figure 8a shows results of wear profiles in a cross-section of a lifter according to an exemplary embodiment of the present invention, described in Example 1; where the black lines show the nominal profile, and the red lines show the wear profile.
- Figure 8b shows results of wear profiles in a cross-section of a prior art lifter, according to what is discussed in Example 1; where the black lines show the nominal profile, and the red lines show the wear profile.
- comminution equipment such as Semiautogen (SAG) mills, autogenous, ball mills, or others, employ different types of coatings to fulfill the task of reducing the load size processed.
- Lifters are among the types of siding typically used in these comminution equipment. These lifters are usually made of steel, rubber or hybrids. Its main function is to allow the material to be processed to be lifted during the operation of the comminution equipment so that, once above, due to gravity, they are separated from the wall of the mill and fall towards the lower section of the mill. In this way, through the impact and abrasion generated, allow the comminution of the material, that is, the decrease in its size.
- lifters (1) are provided for use in comminution equipment, whose main body (2) is cast steel, preferably chrome-molybdenum alloy, white iron, or other.
- these pieces have reinforcements (3) of rubber or other polymer, which can cover at least a portion of the steel body, such as side walls and / or base.
- the steel part or body (2) has, on its upper face (21), at least one shoulder or protuberance (212), while on its lower face (22) it has at least one cavity (223), as can be seen, for example, in Figure 5.
- This at least one cavity (223) covers between about 1% and about 30% of the total volume of the lifter. In preferred embodiments, the at least one cavity may range between about 3% and about 20% or between about 5% and about 15% of the total volume of the lifter. It should be understood that other combinations of percentages are possible within the ranges already described, and that multiple cavities may exist as long as the range of defined percentages is maintained.
- this at least one cavity (223) makes it possible to reduce the total volume and weight of the steel piece, without damaging its mechanical strength, thus achieving, at least, the same lifespan and the same functionality of the lifters of prior art. This is not trivial, precisely because the at least one cavity decreases the volume of the lifter and, therefore, the expert would expect a noticeable decrease in the mechanical strength of the piece. Moreover, depending on the location of the at least one cavity (223) on the lower face of the main steel body, with respect to the at least one protuberance (212), it would be expected that the constant impact of the material with the lifter, damage its structure in advance, affecting its useful life.
- the present invention allows at least maintaining the lifespan of the lifters, and at least maintaining their function, when compared with lifters employed in the art, with the consequent benefits that this implies and that have been described in an exemplary way, in the synthesis of the invention.
- the at least one cavity (223) of the steel part can be of any geometry, such as a square, rectangular, rounded, circular or ovoid base; or of square, rectangular, rounded, concave, ovoid, sinusoidal section, or a combination of them.
- the expert will understand that other forms are possible, without departing from the scope of what is described here.
- the at least one protuberance (212) of the main body (2) of steel it can be convex in at least a portion of the body (2) or flat in at least a portion of the body (2).
- the at least one protuberance (212) is convex in at least a longitudinal portion of the main body (2).
- the at least one protuberance (212) of the main steel body is convex along the entire longitudinal axis of the main steel body (2).
- the basal ends of the at least one convex protuberance may be straight or curved, forming in some embodiments concave portions on the upper face of the main body, or a cross section of a general sinusoidal shape. Other combinations of the geometries described in this paragraph are also possible, without departing from the scope of the invention.
- the reinforcement (3) of rubber or other polymer this may be of any type of rubber or polymer, but preferably it is an abrasion resistant rubber. In a preferred embodiment, it is arranged in the lateral areas and / or at the base of the lifter (1).
- the rubber coating (3) can cover at least one side face of the steel part, such as a pair of side faces; and in still another preferred embodiment, it can cover the base of the steel part, including, for example, the area where the emptying is located.
- the final form of the lifters of the present invention can vary significantly, depending on their position in the comminution equipment, or the typical industry requirements for the optimization of the comminution equipment production, because the Advantages of the invention result, among others, from the particular combination of elements that allow, on the one hand, to reduce the weight of the piece and, on the other, at least maintain the performance of the lifters with respect to lifters of the prior art.
- lifters of the present invention were installed as part of the interior lining of a 40 x 26-foot SAG mill (12.19 m by 7.92 m).
- the lifter used was of the type of piece formed by molybdenum chrome alloy cast steel, where the steel structure had on its underside a series of 3 cavities that, together, covered 15% of the total volume of the lifter.
- the steel part had side and bottom coatings of hot vulcanized rubber, 30 mm and 6 mm thick, respectively.
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- Crushing And Pulverization Processes (AREA)
Abstract
The present invention relates to comminution devices in industrial and mining works, particularly to lifters, the combination of the design and/or materials thereof allowing, altogether, the stoppage time for equipment maintenance to be reduced, owing to easier assembly and disassembly of these products in a mill, and the total number of lifters used in the liner assembly to be reduced, as well as maintaining the feasibility of recycling the conventional pieces.
Description
LEVANTADORES PARA USO EN EQUIPOS DE CONMINUCIÓN LIFTERS FOR USE IN CONTROLLER EQUIPMENT
EN FAENAS INDUSTRIALES Y MINERAS IN INDUSTRIAL AND MINING FAULES
Campo Técnico Technical Field
[001] La presente invención se relaciona con equipos de con inución en faenas industriales y mineras. Particularmente, la presente invención se refiere a revestimientos de equipos (conocidos en el área técnica como lifters y referidos en adelante simplemente como levantadores) que además de proteger la estructura de ellos, se emplean como levantadores de carga durante el proceso productivo y cuyas ventajas técnicas permiten, entre otras cosas, disminuir tanto el peso total como el número de piezas que componen el juego de revestimientos de dichos equipos, logrando, además, una importante disminución en los tiempos de mantenimiento gracias a la optimización de los tiempos de montaje y desmontaje, manteniendo y/o mejorando la vida útil del producto. [001] The present invention relates to equipment with induction in industrial and mining operations. Particularly, the present invention relates to equipment coatings (known in the technical area as lifters and referred to hereinafter simply as lifters) which, in addition to protecting their structure, are used as load lifters during the production process and whose technical advantages They allow, among other things, to reduce both the total weight and the number of parts that make up the set of coatings of said equipment, also achieving a significant decrease in maintenance times thanks to the optimization of assembly and disassembly times, maintaining and / or improving the shelf life of the product.
[002] En paralelo, es importante destacar que la presente invención permite mantener la capacidad de reciclaje de los levantadores y otorga beneficios en costo en comparación a los levantadores del arte previo. [002] In parallel, it is important to note that the present invention allows to maintain the recycling capacity of the lifters and grants cost benefits compared to the lifters of the prior art.
Arte Previo Previous Art
[003] Los equipos de conminución, como molinos autógenos o semi-autógenos, de bolas y barras, disminuyen el tamaño del material que ingresa a ellos a través del impacto y/o la abrasión que se genera gracias a su constante rotación. Estos equipos rotan en torno a su eje generando, de esta manera, el permanente roce e impacto entre los distintos componentes de su carga (principalmente mineral y bolas de acero). [003] Comminution equipment, such as autogenous or semi-autogenous mills, balls and bars, decreases the size of the material that enters them through the impact and / or abrasion that is generated thanks to its constant rotation. These teams rotate around its axis, generating, in this way, the permanent rubbing and impact between the different components of its load (mainly mineral and steel balls).
[004] Para su funcionamiento, estos equipos son provistos de un revestimiento interior que además de proteger su estructura, se encargan de optimizar el arrastre, impacto y movimiento de la carga en proceso, de tal manera disminuir eficientemente su tamaño. [004] For their operation, these equipments are provided with an inner lining that, in addition to protecting their structure, is responsible for optimizing the drag, impact and movement of the load in process, thereby efficiently reducing its size.
[005] En particular, parte del revestimiento interior de estos equipos de conminución corresponde a levantadores. Su función durante la operación del molino es elevar el material por las paredes internas del mismo hasta el punto en que la gravedad logre separarlo de la pared y, como en el caso en los molinos semiautógenos, impulse este material en caída parabólica en dirección a la parte inferior del molino donde se encuentra el resto de la carga que está siendo procesada en ese instante produciendo, de esta manera, el impacto necesario para la disminución de tamaño del material tratado. [005] In particular, part of the inner lining of these comminution equipment corresponds to lifters. Its function during the operation of the mill is to raise the material through its internal walls to the point where gravity manages to separate it from the wall and, as in the case of semi-autogenous mills, propel this material in a parabolic fall in the direction of the lower part of the mill where the rest of the load that is being processed is located, producing, in this way, the necessary impact for the reduction of the size of the treated material.
[006] Actualmente, el juego de revestimientos constituye parte importante del peso que soportan los descansos del molino siendo ésta una de las razones que limitan la capacidad de procesamiento de material. Además, a mayor peso se genera un mayor consumo de energía durante la operación y, en la medida en que dicho juego de
revestimientos se componga de una mayor cantidad de piezas, aumenta el tiempo necesario de cada mantenimiento que considere su renovación. [006] Currently, the set of coatings constitutes an important part of the weight that the mill rests bear, this being one of the reasons that limit the material processing capacity. In addition, the greater the weight, the more energy consumption is generated during the operation and, to the extent that said set of Coatings are made up of a larger number of pieces, increasing the time required for each maintenance that considers its renewal.
[007] Existen en la industria revestimientos de diferentes materiales: acero fundido, acero- caucho (caucho con insertos de acero en su interior) y 100% caucho. Sin embargo, ninguno de los documentos del arte previo enseña ni sugiere que exista alguna propuesta como la descrita en la presente solicitud. [007] Coatings of different materials exist in the industry: cast steel, steel-rubber (rubber with steel inserts inside) and 100% rubber. However, none of the documents of the prior art teach or suggest that there is any proposal as described in this application.
[008] Por ejemplo, en la solicitud WO 2011/130781 a nombre de Vulco SA et al., se describen placas de desgaste como parte del revestimiento de un molino, las que comprenden un cuerpo de elastómero, donde se disponen diversas ranuras y agujeros de descarga de material. En esta solicitud se divulga particularmente un bloque elastomérico que es moldeado por vaciado sobre una placa de soporte y contiene una serie de agujeros de descarga. El problema técnico que resuelve la invención descrita en dicho documento se relaciona con minimizar la obstrucción reiterada de los orificios de descarga del equipo. [008] For example, in the application WO 2011/130781 on behalf of Vulco SA et al., Wear plates are described as part of the lining of a mill, which comprise an elastomer body, where various grooves and holes are arranged of material discharge. In this application an elastomeric block is particularly disclosed which is cast by casting on a support plate and contains a series of discharge holes. The technical problem that solves the invention described in said document is related to minimizing the repeated obstruction of the discharge holes of the equipment.
[009] En la patente US 4,177,955 (The B. F. Goodrich Company) se trata el problema que genera el empleo de levantadores de metal entre revestimientos de caucho, particularmente relacionado con el alto torque que se genera entre levantadores de acero y piezas de revestimiento adyacentes de caucho. En ese documento se propone como solución un revestimiento de caucho unido lateralmente a una porción rígida de plástico, tal como polietileno de alto peso molecular. Con esta solución se logra obtener un revestimiento liviano y adaptable para ser dispuesto entre los levantadores de metal y, por lo tanto, no los reemplaza o modifica su estructura. [009] In US Patent 4,177,955 (The BF Goodrich Company), the problem generated by the use of metal lifters between rubber liners, particularly related to the high torque generated between steel lifters and adjacent cladding parts of Rubber. In this document, a rubber coating laterally bonded to a rigid plastic portion, such as high molecular weight polyethylene, is proposed as a solution. With this solution it is possible to obtain a light and adaptable coating to be arranged between the metal lifters and, therefore, does not replace them or modify their structure.
[0010] Por otra parte, la patente US 9,475,057 (Cabot Corporation) aborda el problema de minimizar la frecuencia en que los revestimientos de un molino deben ser reemplazados, para lo que se proponen levantadores que incluyen una capa elastomérica superior y una capa elastomérica inferior, de distinta composición cada una. [0010] On the other hand, US Patent 9,475,057 (Cabot Corporation) addresses the problem of minimizing the frequency at which mill liners must be replaced, for which lifters are proposed which include an upper elastomeric layer and a lower elastomeric layer. , of different composition each.
[0011] Los inventores no han detectado publicaciones que divulguen soluciones técnicas mediante la que se optimice la producción de un equipo de conminución optimizando el peso de sus revestimientos de acero y minimizando su tiempo de recambio, como la solución que entrega la presente invención. [0011] The inventors have not detected publications that disclose technical solutions whereby the production of a comminution equipment is optimized by optimizing the weight of their steel coatings and minimizing their replacement time, as the solution delivered by the present invention.
Síntesis de la Invención Summary of the Invention
[0012] Un objetivo de la presente invención es proporcionar levantadores de acero para equipos de conminución tales como molinos semi-autógenos, de bolas o similares, más livianos que los empleados actualmente. [0012] An objective of the present invention is to provide steel lifters for comminution equipment such as semi-autogenous, ball mills or the like, lighter than those currently used.
[0013] Es aún otro objetivo de la presente invención reducir el tiempo de recambio de los levantadores, disminuyendo así el tiempo de mantenimiento del equipo de conminución y, por lo tanto, aumentando la disponibilidad de éste.
[0014] Es otro objetivo de la presente invención disminuir la cantidad total de levantadores empleados en el equipo de conminución ya que la optimización del peso individual en comparación con el de los levantadores actualmente usados en el arte, permite aumentar su tamaño y, por lo tanto, disminuir el número total de piezas del juego de revestimientos. [0013] It is yet another objective of the present invention to reduce the replacement time of the lifters, thus decreasing the maintenance time of the comminution equipment and, therefore, increasing the availability thereof. [0014] It is another objective of the present invention to reduce the total number of lifters used in the comminution equipment since the optimization of the individual weight compared to that of the lifters currently used in the art, allows to increase its size and, therefore, therefore, decrease the total number of pieces of the cladding set.
[0015] Es otro objetivo de la presente invención al menos mantener el desempeño de los levantadores respecto a los del estado de la técnica. [0015] It is another objective of the present invention to at least maintain the performance of the lifters with respect to those of the prior art.
[0016] Adicionalmente, es otro objetivo de la presente invención no alterar la factibilidad de reciclaje de los levantadores una vez cumplida su vida útil en la operación del equipo de conminución. Lo anterior es posible, gracias a la geometría del producto y a las características de la aplicación de caucho en alguna de las modalidades de la presente invención. [0016] Additionally, it is another objective of the present invention not to alter the feasibility of recycling the lifters once their useful life in the operation of the comminution equipment has been fulfilled. The foregoing is possible, thanks to the geometry of the product and the characteristics of the rubber application in any of the embodiments of the present invention.
[0017] En vista de las ventajas técnicas alcanzadas mediante la presente invención, se deberá entender como objetivo global el aumentar la producción a través del aumento de disponibilidad. [0017] In view of the technical advantages achieved by the present invention, it should be understood as a global objective to increase production through increased availability.
[0018] Estos y otros objetivos, así como las ventajas técnicas asociadas a la presente invención serán evidentes para el experto a partir de la siguiente descripción. [0018] These and other objectives, as well as the technical advantages associated with the present invention will be apparent to the expert from the following description.
Breve descripción de las figuras Brief description of the figures
[0019] La invención será descrita de modo ejemplar y en referencia a los dibujos adjuntos, en donde: [0019] The invention will be described in an exemplary manner and in reference to the attached drawings, wherein:
[0020] La Figura 1 muestra una sección de manto de revestimiento para equipos de conminución con levantadores del arte previo, empleados típicamente en la industria. [0020] Figure 1 shows a coating mantle section for comminution equipment with prior art lifters, typically employed in the industry.
[0021] La Figura 2 es una vista en sección transversal de un levantador del arte previo. [0021] Figure 2 is a cross-sectional view of a prior art lifter.
[0022] La Figura 3 muestra un conjunto de levantadores de acuerdo con una modalidad de la presente invención, tal como se dispondrían en un equipo de conminución. El experto entenderá que este conjunto forma una porción del revestimiento de levantadores que se disponen en un equipo de conminución. [0022] Figure 3 shows a set of lifters according to an embodiment of the present invention, as they would be arranged in a comminution equipment. The expert will understand that this assembly forms a portion of the liner of lifters that are arranged in a comminution equipment.
[0023] La Figura 4 es una vista en perspectiva superior de un levantador de acuerdo con una modalidad de la presente invención. [0023] Figure 4 is a top perspective view of a lifter according to an embodiment of the present invention.
[0024] La Figura 5 es una vista en perspectiva inferior de un levantador de acuerdo con una modalidad de la presente invención, donde se muestra la porción de acero con cavidades en su cara inferior. [0024] Figure 5 is a bottom perspective view of a lifter according to an embodiment of the present invention, where the portion of steel with cavities in its lower face is shown.
[0025] La Figura 6 es una vista en perspectiva inferior de un levantador de acuerdo con otra modalidad de la presente invención, donde se aprecia la porción de acero recubierta por caucho.
[0026] La Figura 7a ilustra la sección transversal de levantadores de acuerdo con una modalidad ejemplar de la presente invención. [0025] Figure 6 is a bottom perspective view of a lifter according to another embodiment of the present invention, where the rubber-coated steel portion is appreciated. [0026] Figure 7a illustrates the cross section of lifters in accordance with an exemplary embodiment of the present invention.
[0027] La Figura 7b ilustra la sección transversal de un levantador de acuerdo con otra modalidad ejemplar de la presente invención. [0027] Figure 7b illustrates the cross section of a lifter according to another exemplary embodiment of the present invention.
[0028] La Figura 7c ilustra la sección transversal de levantadores de acuerdo con aún otra modalidad ejemplar de la presente invención. [0028] Figure 7c illustrates the cross section of lifters in accordance with yet another exemplary embodiment of the present invention.
[0029] La Figura 8a muestra resultados de perfiles de desgaste en un corte transversal de un levantador de acuerdo con una modalidad ejemplar de la presente invención, descrita en el Ejemplo 1; donde las líneas negras muestran el perfil nominal, y las líneas rojas muestran el perfil del desgaste. [0029] Figure 8a shows results of wear profiles in a cross-section of a lifter according to an exemplary embodiment of the present invention, described in Example 1; where the black lines show the nominal profile, and the red lines show the wear profile.
[0030] La Figura 8b muestra resultados de perfiles de desgaste en un corte transversal de un levantador del arte previo, de acuerdo con lo que se comenta en el Ejemplo 1; donde las líneas negras muestran el perfil nominal, y las líneas rojas muestran el perfil del desgaste. [0030] Figure 8b shows results of wear profiles in a cross-section of a prior art lifter, according to what is discussed in Example 1; where the black lines show the nominal profile, and the red lines show the wear profile.
Descripción detallada de modalidades preferentes de la presente invención Detailed description of preferred embodiments of the present invention
[0031] Tal como se aprecia en la Figura 1, los equipos de conminución tales como molinos Semiautógenos (SAG), molinos autógenos, de bolas, u otros, emplean distintos tipos de revestimientos para cumplir con la tarea de disminuir el tamaño de la carga procesada. Entre los tipos de revestimiento típicamente empleados en estos equipos de conminución se cuentan los levantadores. Estos levantadores suelen ser de acero, de caucho o bien híbridos. Su función principal es permitir que el material a procesar sea levantado durante la operación del equipo de conminución para que, una vez arriba, por efecto de la gravedad, sean separados de la pared del molino y caigan hacia la sección inferior del molino. De esta manera, a través del impacto y la abrasión generados, permitir la conminución del material, esto es, la disminución de su tamaño. [0031] As can be seen in Figure 1, comminution equipment such as Semiautogen (SAG) mills, autogenous, ball mills, or others, employ different types of coatings to fulfill the task of reducing the load size processed. Lifters are among the types of siding typically used in these comminution equipment. These lifters are usually made of steel, rubber or hybrids. Its main function is to allow the material to be processed to be lifted during the operation of the comminution equipment so that, once above, due to gravity, they are separated from the wall of the mill and fall towards the lower section of the mill. In this way, through the impact and abrasion generated, allow the comminution of the material, that is, the decrease in its size.
[0032] De acuerdo con un aspecto de la presente invención, se proporcionan levantadores (1) para uso en equipos de conminución, cuyo cuerpo principal (2) es de acero fundido, preferentemente de aleación del tipo cromo-molibdeno, hierro blanco, u otra. En modalidades preferentes, estas piezas presentan refuerzos (3) de caucho u otro polímero, que pueden abarcar al menos una porción del cuerpo de acero, como por ejemplo, paredes laterales y/o base. [0032] In accordance with one aspect of the present invention, lifters (1) are provided for use in comminution equipment, whose main body (2) is cast steel, preferably chrome-molybdenum alloy, white iron, or other. In preferred embodiments, these pieces have reinforcements (3) of rubber or other polymer, which can cover at least a portion of the steel body, such as side walls and / or base.
[0033] La pieza de acero o cuerpo (2) presenta, en su cara superior (21), al menos un resalte o protuberancia (212), mientras que en su cara inferior (22) presenta al menos una cavidad (223), tal como se aprecia, por ejemplo, en la Figura 5. Esta al menos una cavidad (223) abarca entre alrededor del 1% y alrededor del 30% del volumen total del levantador. En modalidades preferentes, la al menos una cavidad puede abarcar entre alrededor del 3% y alrededor del 20% o entre alrededor de 5% y alrededor del 15% del
volumen total del levantador. Se deberá entender que otras combinaciones de porcentajes son posibles dentro de los rangos ya descritos, y que pueden existir múltiples cavidades en la medida que el rango de porcentajes definidos se mantenga. [0033] The steel part or body (2) has, on its upper face (21), at least one shoulder or protuberance (212), while on its lower face (22) it has at least one cavity (223), as can be seen, for example, in Figure 5. This at least one cavity (223) covers between about 1% and about 30% of the total volume of the lifter. In preferred embodiments, the at least one cavity may range between about 3% and about 20% or between about 5% and about 15% of the total volume of the lifter. It should be understood that other combinations of percentages are possible within the ranges already described, and that multiple cavities may exist as long as the range of defined percentages is maintained.
[0034] La presencia de esta al menos una cavidad (223) permite disminuir el volumen y peso total de la pieza de acero, sin perjudicar su resistencia mecánica, logrando así, al menos, la misma vida útil y la misma funcionalidad de los levantadores del arte previo. Esto no es trivial, debido precisamente a que la al menos una cavidad disminuye el volumen del levantador y, por lo tanto, el experto esperaría una notoria disminución en la resistencia mecánica de la pieza. Más aún, dependiendo de la ubicación de la al menos una cavidad (223) en la cara inferior del cuerpo principal de acero, con respecto a la al menos una protuberancia (212), se esperaría que el constante impacto del material con el levantador, dañe anticipadamente la estructura del mismo, afectando su vida útil. [0034] The presence of this at least one cavity (223) makes it possible to reduce the total volume and weight of the steel piece, without damaging its mechanical strength, thus achieving, at least, the same lifespan and the same functionality of the lifters of prior art. This is not trivial, precisely because the at least one cavity decreases the volume of the lifter and, therefore, the expert would expect a noticeable decrease in the mechanical strength of the piece. Moreover, depending on the location of the at least one cavity (223) on the lower face of the main steel body, with respect to the at least one protuberance (212), it would be expected that the constant impact of the material with the lifter, damage its structure in advance, affecting its useful life.
[0035] No obstante lo anterior, y de manera sorprendente, la presente invención permite al menos mantener la vida útil de los levantadores, y al menos mantener la función de los mismos, cuando se los compara con levantadores empleados en el arte, con los consecuentes beneficios que ello implica y que han sido descritos de manera ejemplar, en la síntesis de la invención. [0035] Notwithstanding the foregoing, and surprisingly, the present invention allows at least maintaining the lifespan of the lifters, and at least maintaining their function, when compared with lifters employed in the art, with the consequent benefits that this implies and that have been described in an exemplary way, in the synthesis of the invention.
[0036] La al menos una cavidad (223) de la pieza de acero puede ser de cualquier geometría, tal como de base cuadrada, rectangular, redondeada, circular u ovoide; o de sección cuadrada, rectangular, redondeada, cóncava, ovoide, sinusoidal, o una combinación de ellas. El experto entenderá que otras formas son posibles, sin alejarse del alcance de lo aquí descrito. [0036] The at least one cavity (223) of the steel part can be of any geometry, such as a square, rectangular, rounded, circular or ovoid base; or of square, rectangular, rounded, concave, ovoid, sinusoidal section, or a combination of them. The expert will understand that other forms are possible, without departing from the scope of what is described here.
[0037] En cuanto a la al menos una protuberancia (212) del cuerpo principal (2) de acero, ella puede ser convexa en al menos una porción del cuerpo (2) o plana en al menos una porción del cuerpo (2). En una modalidad preferente, la al menos una protuberancia (212) es convexa en al menos una porción longitudinal del cuerpo principal (2). En aún otra modalidad preferente, la al menos una protuberancia (212) del cuerpo principal de acero es convexa en todo el eje longitudinal del cuerpo principal (2) de acero. Los extremos básales de la al menos una protuberancia convexa pueden ser rectos o curvos, formando en algunas modalidades porciones cóncavas en la cara superior del cuerpo principal, o una sección transversal de forma general sinusoidal. Otras combinaciones de las geometrías descritas en este párrafo también son posibles, sin alejarse del alcance de la invención. [0037] As for the at least one protuberance (212) of the main body (2) of steel, it can be convex in at least a portion of the body (2) or flat in at least a portion of the body (2). In a preferred embodiment, the at least one protuberance (212) is convex in at least a longitudinal portion of the main body (2). In yet another preferred embodiment, the at least one protuberance (212) of the main steel body is convex along the entire longitudinal axis of the main steel body (2). The basal ends of the at least one convex protuberance may be straight or curved, forming in some embodiments concave portions on the upper face of the main body, or a cross section of a general sinusoidal shape. Other combinations of the geometries described in this paragraph are also possible, without departing from the scope of the invention.
[0038] En cuanto al refuerzo (3) de caucho u otro polímero, éste puede ser de cualquier tipo de caucho o polímero, pero de preferencia se trata de un caucho resistente a la abrasión. En una modalidad preferente, éste está dispuesto en las zonas laterales y/o en la base del levantador (1). Por ejemplo, el recubrimiento de caucho (3) puede abarcar al menos una cara lateral de la pieza de acero como, por ejemplo, un par de
caras laterales; y en aún otra modalidad preferente, puede abarcar la base de la pieza de acero, incluyendo, por ejemplo, la zona donde se ubica el vaciado. [0038] As regards the reinforcement (3) of rubber or other polymer, this may be of any type of rubber or polymer, but preferably it is an abrasion resistant rubber. In a preferred embodiment, it is arranged in the lateral areas and / or at the base of the lifter (1). For example, the rubber coating (3) can cover at least one side face of the steel part, such as a pair of side faces; and in still another preferred embodiment, it can cover the base of the steel part, including, for example, the area where the emptying is located.
[0039] La unión de las piezas de acero y de caucho se realiza mediante un sistema de vulcanizado en caliente o en frío, obteniéndose así una unión resistente que evita que el caucho pierda adherencia al recibir impactos o sufrir por el roce o contacto con otros elementos tanto en su traslado como en su instalación. [0039] The joining of the steel and rubber parts is carried out by means of a hot or cold vulcanizing system, thus obtaining a resistant union that prevents the rubber from losing grip when receiving impacts or suffering from rubbing or contact with others. elements both in its transfer and in its installation.
[0040] La forma final de los levantadores de la presente invención puede variar significativamente, dependiendo de su posición en el equipo de conminución, o de los requerimientos típicos de la industria para la optimización de la producción del equipo de conminución, debido a que las ventajas de la invención resultan, entre otros, de la particular combinación de elementos que permiten, por una parte, disminuir el peso de la pieza y, por otra, al menos mantener el desempeño de los levantadores respecto de levantadores del arte previo. [0040] The final form of the lifters of the present invention can vary significantly, depending on their position in the comminution equipment, or the typical industry requirements for the optimization of the comminution equipment production, because the Advantages of the invention result, among others, from the particular combination of elements that allow, on the one hand, to reduce the weight of the piece and, on the other, at least maintain the performance of the lifters with respect to lifters of the prior art.
Ejemplos de aplicación Application examples
[0041] A continuación, se presenta un ejemplo de una de las modalidades preferentes de la presente invención. Se deberá entender que, como tal, el ejemplo aquí expuestos muestras condiciones particulares de uso de una de las modalidades preferentes, puesta en práctica en una faena minera. En ningún caso se deberán considerar como ejemplo limitativo o restrictivo de la presente invención. [0041] An example of one of the preferred embodiments of the present invention is presented below. It should be understood that, as such, the example set forth here shows particular conditions of use of one of the preferred modalities, implemented in a mining operation. In no case should they be considered as a limiting or restrictive example of the present invention.
Ejemplo 1 Example 1
[0042] En una faena minera de extracción de minerales, se instalaron levantadores de la presente invención como parte del revestimiento interior de un molino SAG de 40 x 26 pies (12,19 m por 7,92 m). El levantador empleado fue del tipo de pieza formada por acero fundido de aleación al cromo molibdeno, donde la estructura de acero contó en su cara inferior con una serie de 3 cavidades que, en conjunto, abarcaban el 15% del volumen total del levantador. [0042] In a mineral extraction mining site, lifters of the present invention were installed as part of the interior lining of a 40 x 26-foot SAG mill (12.19 m by 7.92 m). The lifter used was of the type of piece formed by molybdenum chrome alloy cast steel, where the steel structure had on its underside a series of 3 cavities that, together, covered 15% of the total volume of the lifter.
[0043] La pieza de acero presentaba recubrimientos laterales e inferior de caucho vulcanizado en caliente, de 30 mm y de 6 mm de espesor, respectivamente. [0043] The steel part had side and bottom coatings of hot vulcanized rubber, 30 mm and 6 mm thick, respectively.
[0044] Una vez realizada la instalación de los levantadores, se puso en marcha el molino, el que estuvo operativo por 182 días y 13,7 millones de toneladas procesadas antes de que fuera necesaria una mantención para recambio de piezas. [0044] Once the installation of the lifters was completed, the mill was started, which was operational for 182 days and 13.7 million tons processed before maintenance was required to replace parts.
[0045] Al término de este periodo se realizaron mediciones de control cuyos resultados se pueden apreciar en las Figuras 8a y 8b y en la Tabla 1:
[0045] At the end of this period, control measurements were made whose results can be seen in Figures 8a and 8b and in Table 1:
TABLA 1: Muestra los datos relacionados con el desgaste del levantador y de la placa del presente ejemplo, tal como se ilustra en la Figura 8a y el desgaste del levantador y de la placa de un levantador del arte previo, ilustrado en la Figura 8b, el que no contaba con cavidad alguna. TABLE 1: Shows the data related to the lifter and plate wear of the present example, as illustrated in Figure 8a and the lifter and plate wear of a prior art lifter, illustrated in Figure 8b, he who had no cavity.
[0046] Tal como se aprecia, con los levantadores de la presente invención se obtiene un mejor desempeño de desgaste que el que se obtiene con revestimientos que emplean levantadores del arte previo. Además, se verificó que el tiempo de cambio (Desmontaje/Montaje) fue menor o igual que el tiempo de cambio de levantadores del arte previo. [0046] As can be seen, with the lifters of the present invention a better wear performance is obtained than that obtained with coatings employing lifters of the prior art. In addition, it was verified that the change time (Disassembly / Assembly) was less than or equal to the change time of previous art lifters.
[0047] A pesar de que la presente invención ha sido descrita y ejemplificada en referencia a las modalidades preferentes, se deberá entender que existen variaciones y cambios que pueden realizarse sin desviarse del alcance de la invención reivindicada, los que serán evidentes para el experto. [0047] Although the present invention has been described and exemplified in reference to the preferred embodiments, it should be understood that there are variations and changes that can be made without departing from the scope of the claimed invention, which will be apparent to the expert.
* **
* **
Claims
1. Un levantador para uso como elemento de revestimiento interior en equipos de conminución, caracterizado porque está compuesto por un cuerpo principal de acero fundido, donde el cuerpo principal de acero cuenta, en su cara superior, con al menos una protuberancia y en su cara inferior con al menos una cavidad, donde la al menos una cavidad abarca entre el 1% y el 30% del volumen total del levantador. 1. A lifter for use as an inner lining element in comminution equipment, characterized in that it is composed of a main body of cast steel, where the main body of steel has, on its upper face, at least one protuberance and on its face bottom with at least one cavity, where the at least one cavity covers between 1% and 30% of the total volume of the lifter.
2. El levantador de las reivindicaciones 1, caracterizado porque la al menos una cavidad abarca entre el 3% y el 20% del volumen total del levantador. 2. The lifter of claims 1, characterized in that the at least one cavity comprises between 3% and 20% of the total volume of the lifter.
3. El levantador de las reivindicaciones 1 ó 2, caracterizado porque la al menos una cavidad abarca entre el 5% y el 15% del volumen total del levantador. 3. The lifter of claims 1 or 2, characterized in that the at least one cavity comprises between 5% and 15% of the total volume of the lifter.
4. El levantador de cualquiera de las reivindicaciones precedentes, caracterizado porque el cuerpo principal de acero fundido cuenta con un recubrimiento polimérico que abarca al menos una porción del cuerpo principal de acero. 4. The lifter of any of the preceding claims, characterized in that the main body of cast steel has a polymeric coating that comprises at least a portion of the main body of steel.
5. El levantador de la reivindicación 4, caracterizado porque el recubrimiento polimérico que abarca al menos una porción del cuerpo principal de acero es caucho u otro polímero que garantice el correcto desempeño del producto en la aplicación. 5. The lifter of claim 4, characterized in that the polymeric coating comprising at least a portion of the main body of steel is rubber or another polymer that guarantees the correct performance of the product in the application.
6. El levantador de la reivindicación 4 ó 5, caracterizado porque la al menos una porción del cuerpo principal de acero es una de sus caras laterales. 6. The lifter of claim 4 or 5, characterized in that the at least a portion of the main steel body is one of its lateral faces.
7. El levantador de la reivindicación 4 ó 5, caracterizado porque la al menos una porción del cuerpo principal de acero corresponde a ambas caras laterales del cuerpo principal. 7. The lifter of claim 4 or 5, characterized in that the at least a portion of the main steel body corresponds to both side faces of the main body.
8. El levantador de la reivindicación 4 ó 5, caracterizado porque la al menos una porción del cuerpo principal de acero es su cara inferior o base. 8. The lifter of claim 4 or 5, characterized in that the at least a portion of the main steel body is its lower face or base.
9. El levantador de la reivindicación 8, caracterizado porque la al menos una porción del cuerpo principal incluye la al menos una cavidad de manera parcial o total. 9. The lifter of claim 8, characterized in that the at least a portion of the main body includes the at least one cavity partially or totally.
10. El levantador de cualquiera de las reivindicaciones precedentes, caracterizado porque la al menos una cavidad del cuerpo de acero es de base cuadrada, rectangular, redondeada, circular u ovoide, o una combinación de ellas. 10. The lifter of any of the preceding claims, characterized in that the at least one cavity of the steel body is square, rectangular, rounded, circular or ovoid, or a combination thereof.
11. El levantador de cualquiera de las reivindicaciones precedentes, caracterizado porque la al menos una cavidad del cuerpo de acero es de sección cuadrada, rectangular, redondeada, cóncava, ovoide, sinusoidal, o de una combinación de ellas. 11. The lifter of any of the preceding claims, characterized in that the at least one cavity of the steel body is square, rectangular, rounded, concave, ovoid, sinusoidal, or a combination thereof.
12. El levantador de cualquiera de las reivindicaciones precedentes, caracterizado porque la al menos una protuberancia del cuerpo principal de acero es convexa en al menos una porción del eje longitudinal del cuerpo principal.
12. The lifter of any of the preceding claims, characterized in that the at least one protuberance of the main body of steel is convex in at least a portion of the longitudinal axis of the main body.
13. El levantador de la reivindicación 12, caracterizado porque la al menos una protuberancia del cuerpo principal de acero es convexa en todo el eje longitudinal del cuerpo principal. 13. The lifter of claim 12, characterized in that the at least one protuberance of the main steel body is convex along the entire longitudinal axis of the main body.
14. El levantador de cualquiera de las reivindicaciones precedentes, caracterizado porque la al menos una protuberancia del cuero principal es plana en al menos una porción del eje longitudinal del cuerpo principal. 14. The lifter of any of the preceding claims, characterized in that the at least one protrusion of the main leather is flat on at least a portion of the longitudinal axis of the main body.
15. El levantador de cualquiera de las reivindicaciones precedentes, caracterizado porque los extremos básales de la al menos una protuberancia del cuerpo principal de acero son rectos. 15. The lifter of any of the preceding claims, characterized in that the basal ends of the at least one protrusion of the main steel body are straight.
16. El levantador de cualquiera de las reivindicaciones 1 a 13, caracterizado porque los extremos básales de la al menos una protuberancia del cuerpo principal de acero son curvos. 16. The lifter of any one of claims 1 to 13, characterized in that the basal ends of the at least one protrusion of the main steel body are curved.
17. El levantador de cualquiera de las reivindicaciones 1 a 13, caracterizado porque al menos un extremo basal de la al menos una protuberancia del cuerpo principal de acero presenta una o más porción cóncavas en la cara frontal superior del cuerpo principal. 17. The lifter of any one of claims 1 to 13, characterized in that at least one basal end of the at least one protuberance of the main steel body has one or more concave portions in the upper front face of the main body.
18. El levantador de cualquiera de las reivindicaciones 1 a 13, caracterizado porque al menos un extremo basal de la al menos una protuberancia del cuerpo principal de acero es de sección transversal de forma general sinusoidal. 18. The lifter of any one of claims 1 to 13, characterized in that at least one basal end of the at least one protrusion of the main steel body is of sinusoidal general cross-section.
19. El levantador de acuerdo con cualquiera de las reivindicaciones precedentes, caracterizado porque el acero del cuerpo principal es de acero fundido de cromo molibdeno, hierro blanco u otra familia de aleaciones.
19. The lifter according to any of the preceding claims, characterized in that the steel of the main body is molybdenum molybdenum steel, white iron or another family of alloys.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CL2018002389A CL2018002389A1 (en) | 2018-08-21 | 2018-08-21 | Lifters for use in comminution equipment in industrial and mining operations |
| CL2389-2018 | 2018-08-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020037440A1 true WO2020037440A1 (en) | 2020-02-27 |
Family
ID=65588807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CL2019/000028 WO2020037440A1 (en) | 2018-08-21 | 2019-08-20 | Lifters for use in comminution devices in industrial and mining works |
Country Status (2)
| Country | Link |
|---|---|
| CL (1) | CL2018002389A1 (en) |
| WO (1) | WO2020037440A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5185980A (en) * | 1990-03-13 | 1993-02-16 | Trellex Aktiebolag | Wall exposed to wear and means for making it |
| US6206310B1 (en) * | 1997-07-17 | 2001-03-27 | Magotteaux International | Rotary mill |
| US20070284464A1 (en) * | 2006-06-07 | 2007-12-13 | Nordell Lawrence K | Rock grinding mill and method |
| WO2011150531A1 (en) * | 2010-04-13 | 2011-12-08 | Metso Minerals Chile S.A. | Lifter for sag mills, made of steel and rubber |
| US20160310952A1 (en) * | 2015-04-22 | 2016-10-27 | Lawrence K. Nordell | Rock Mill Lifter |
-
2018
- 2018-08-21 CL CL2018002389A patent/CL2018002389A1/en unknown
-
2019
- 2019-08-20 WO PCT/CL2019/000028 patent/WO2020037440A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5185980A (en) * | 1990-03-13 | 1993-02-16 | Trellex Aktiebolag | Wall exposed to wear and means for making it |
| US6206310B1 (en) * | 1997-07-17 | 2001-03-27 | Magotteaux International | Rotary mill |
| US20070284464A1 (en) * | 2006-06-07 | 2007-12-13 | Nordell Lawrence K | Rock grinding mill and method |
| WO2011150531A1 (en) * | 2010-04-13 | 2011-12-08 | Metso Minerals Chile S.A. | Lifter for sag mills, made of steel and rubber |
| US20160310952A1 (en) * | 2015-04-22 | 2016-10-27 | Lawrence K. Nordell | Rock Mill Lifter |
Also Published As
| Publication number | Publication date |
|---|---|
| CL2018002389A1 (en) | 2019-02-08 |
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