Publication: SEPARACIÓN DE MINERAL MEDIANTE LA SEGREGACIÓN NATURAL PARA OPTIMIZAR UNA PLANTA DE PRE-CHANCADO
Date
2018
Authors
TAPIA PARDO, RODRIGO
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Abstract
El presente trabajo se realizó con el propósito de modelar, determinar y analizar si la segregación natural que se produce en el llenado y vaciado de un silo de almacenamiento con mineral chancado, se puede aprovechar para separar el mineral fino del mineral grueso con la finalidad de alimentar por separado una planta de pre-chancado. Para la realización de este estudio se diseñó y confeccionó un modelo representativo de una tolva de fondo plano con tres alimentadores de descarga, que puedan aprovechar el fenómeno de segregación natural.Para maximizar la segregación de mineral chancado se estudiaron distintos factores, como lo son la altura de pila y la variación de flujo másico de descarga entre la interfase central y las laterales. Para cada ensayo se obtuvieron curvas de distribución granulométricas, tanto de las descargas laterales como la descarga central, y para cuantificar la segregación se utilizó un número adimensional Cs.De acuerdo a los resultados obtenidos, se logra cuantificar la segregación para cada uno de los ensayos propuestos, observándose que esta tiende a aumentar a medida que la altura de pila en el interior del acopio sea mayor. Igualmente, la segregación tiende a aumentar al tener un mayor flujo de descarga, por la descarga central que por las descargas laterales. Para maximizar la segregación y alimentar una planta de pre-chancado, se recomienda trabajar a la altura de “rebalse”, altura donde la descarga central se encuentra llena y comienza a caer mineral a las descargas laterales, caso en que se obtuvo la mayor segregación con Cs = 33,1%.
This work’s objective is to model, determine and analyze if the natural segregation produced in the filling and emptying of a crushed mineral storage silo can be used to separate fine minerals from coarse minerals with the purpose of feeding separately a pre-crushing plant. In this study, we designed and implemented a representative model of a flat bottom hopper with three discharge feeders, which can take advantage of the natural segregation phenomenon. To maximize segregation of crushed minerals, several factors were studied, for example stack height and the mass flow variation of discharge between central and lateral interface. For each test, particle size distribution curves were obtained, both for lateral and central discharge. To quantify the segregation a dimensionless number Cs was used. According to the obtained results, it is possible to quantify segregation in each one of the proposed tests, observing that segregation tends to increase as the pile height in the interior of the storage is greater. Furthermore, segregation tends to increase with greater discharge flow, more by central discharge than by the lateral discharges. To maximize segregation and feed a pre-crushing plant, it is recommended to work at the "overflow" height, where central discharge is full and the lateral discharges start to reclaim the particles, in this case, greater segregation the obtained with Cs = 33.1%.
This work’s objective is to model, determine and analyze if the natural segregation produced in the filling and emptying of a crushed mineral storage silo can be used to separate fine minerals from coarse minerals with the purpose of feeding separately a pre-crushing plant. In this study, we designed and implemented a representative model of a flat bottom hopper with three discharge feeders, which can take advantage of the natural segregation phenomenon. To maximize segregation of crushed minerals, several factors were studied, for example stack height and the mass flow variation of discharge between central and lateral interface. For each test, particle size distribution curves were obtained, both for lateral and central discharge. To quantify the segregation a dimensionless number Cs was used. According to the obtained results, it is possible to quantify segregation in each one of the proposed tests, observing that segregation tends to increase as the pile height in the interior of the storage is greater. Furthermore, segregation tends to increase with greater discharge flow, more by central discharge than by the lateral discharges. To maximize segregation and feed a pre-crushing plant, it is recommended to work at the "overflow" height, where central discharge is full and the lateral discharges start to reclaim the particles, in this case, greater segregation the obtained with Cs = 33.1%.
Description
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Keywords
PLANTA DE PRE-CHANCADO , SEGREGACION NATURAL , SEPARACION DE MINERAL