FLOTACION : Un enfoque practicoUniversidad Nacional de IngenieraSPCC Unidad Toquepala, del 4 al 8 de Agosto de 2003Jose Manzaneda Cabala

MODULO I FACTORES DETERMINANTES EN FLOTACIN

Esquema del CursoFACTORESMOLIENDAMINERALOGIAREACTIVOSFLOTACION ANALISISVARIOS TEMASINVESTIGACION METALURGICAVARIOS TEMASCONCENTRADORA DE 90,000tmd, CRITERIOS DE AUTOMATIZACION

MOLIENDA

Carga de bolas y velocidad critica

Control rpido de granulometra% slidos = W 1000 W. KPeso de pulpa( en un litro) = W Peso de slido en un litro = W% slidos W1, W2 son densidades de pulpa antes y despus de lavar en la malla de referencia

Importancia de la densidad de pulpa (1 hr).

Calculo practico de Carga CirculanteBalance slidos = mallasBalance lquidos = DilucionesCc = d-o / s-dCc = (Do-Dd) /(Dd-Ds)Si : D = 1-P /P y adems P = W-1000 / WKdonde P es % slidos y W es densidad de pulpa...(1)...(2)

Densidades y circuitoDensidad de control. Vlvulas actuadoras. Bombas stand-by Vlvulas tech Bombas de velocidad variable Sello de bombas y partes de desgaste

PSI, densidades y granulometra

Operacin de un ciclonGPM = 2.2 D2Presion (velocidad variable)Venteo y efecto sifonApex y vortexDiametro y corte D50Partes de desgaste y su efecto.Cuerpo cilndrico-cnico su efecto.Ventajas y desventajas frente al clasificador mecnico.Nido radial y en serie

Corte de clasificacin D50

Cargas circulantes y corte de clasificacin relacin con la mineraloga (1 hr).

Calculo practico del D50

Opciones de control en molienda: densidad de pulpa y granulometra Rosin-Rammler (0.5 hr)

Ejemplo de calculo

Como saber si un balance de flujos esta bien hecho Jr.CC mallas = 0.97CC Jr minimo = ? CC densid. = 1.10

Granulometra sin papel logartmico?F80?20% retenido; 80% pasante = CC = 25%

Calculo practico de bypassOAS

Arreglo de un circuito de molienda clasificacin 100% automtico, la tendencia del futuro. (1 hr)

Criterio de Molienda en el FuturoPSIRatioControlFTFTFTJTDTLTWTWTWaterOre SilosVibrating FeedersVariableSpeed BeltPowerMeasurementWaterVariable Speed pumpParticle size InstrumentTo FlotationLoad CellDT density measurementDC density controlFT flow measurementFC flow controlJT power measurementLT level measurementLC level controlPT pressure measurementWT weight measurementWC weight control

Clasificacin en zarandas de alta frecuencia, su influencia en el prximo milenio (0.5 hr).

Esquema para Brocal con zaranda de alta frecuencia.A flotacinBMBMRMBMCC de 400 a 100% y producto molido 100% -m100 ?

Concepto practico sobre la molienda autgena (0.5 hr)Sistema de molienda que se acomoda al tratamiento de materiales monometalicos, en los polimetalicos se pierde valiosa informacin que se obtiene de la seccin chancado : Minerales magnticos, sales solubles de zinc y plomocmo se resolvi el asunto de la carga circulante?Varias zonas de dureza cambiante en roca competente a SAG, carga de bolas es 10 a 15% Vp, como afectara la clasificacin?Que tan bueno es las recetas vienen de arriba, solo se debe aplicarlas10% el equipo- 88% el factor humano , 2% la casualidad

SE PODRA AUTOMATIZAR TODA LA MOLIENDA?PSI ?AGUA

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