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PROBLEMAS DE CHANCADO EFICIENCIAS DE CHANCADO E = Ot x 100 100 Op
E: Eficiencia de extraccion en el undersize Ot: Peso del oversize producido Op: Peso del verdadero oversize en el alimento, como se ha det
E=
E: Eficiencia de recuperacion de finos (undersize) a: Porcentaje de finos (undersize) en el alimento b: Porcentaje de finos (undersize) en el producto grueso (oversi
a-b a (100 - b)
CARGA CIRCULANTE
S=
S:Suma de las series T: Promedio de alimentacion TPH de material nuevo al circuito Ri: Proporciond e oversize en el producto de la chancadora, exp Ri = 30% = 0.3 T = 100 TPH S = 100 / (1 -0.3) = S = 142.9 TPH
R: Fraccion (decimal) verdadera de oversize en E: Eficiencia de la malla (fraccion decimal)
Peso verdadero de overize en el alimento Peso actual del oversize producido en el cedazo
Aplicando el factor de correccion a E, a la formula de sumatoria se obtiene S= T 1-R E Suponiendo que en el ejemplo anterior E = 0.9 o 90% S = 100 = 150 TPH 1 - 0.3 0.9 La carga circulante = 150 -100 x 100% = 100
50 %
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Tipo de Chancadora Quijada Quijada Giratoria Giratoria Giratoria
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Solucion
19% -1" 13% - 1/2" Del grafico N°1 N°1 trazamos una linea vertical al 80% passing y a 2 1/2" trazamos u La interseccion de ambas lineas, da con la curva del material que se esta chanc hacia abajo, hasta la interseccion con el tamaño de producto 1", del cual se enc y 61% mayor que 1"; R = 61% Por lo tanto peso de material mayor que 1" =
200 200 x 0.61 0.61 = 122. 122.0 0 TPH TPH
Peso de O/S + 1" actual =
Peso verdadero de de ov overize = E Peso de la descarga de scarga de d e Zaranda N° N °1 + 1" = 162.7 TPH
122.0 TP TPH 0 .8 5
Carga total a la chancadora =
162.7 = 1 - ( 0.3) 0.75
carga circulante = % CC =
T = 1-R E 108.4 TPH
108.4 TPH x 1 108.4 100 00 162.7
% CC CC = 66.7 66.7 %
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erminado en el laboratorio
e)
resada como fraccion decimal
ductos etapa u/s
70 91 97.3 99.2 99.75 99.93 100
el producto de la chancadora
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peso mas fino que set de chancadora Material Granito Minerales Silicoso 70 - 75 65 - 70 85 - 90 65 - 70 60 - 65 80 - 85 75 - 80 65 - 70 85 - 90 65 - 70 65 - 70 70 - 75 80 - 85 75 - 80 85 - 90
Chancadora secundaria
71.3 TPH 100.0 TPH 28.8 TPH 28.8 TPH
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0.541176471
MIZADO
Chancadora Giratoria 2ria Set de 2"
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= 232.0 TPH
386.7 TPH
200 37.3 TPH
1 00 1 8 .7
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na linea horizontal. ando, seguimos la curva entra 39% menor que 1"