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J. M. Menacho, M. H. Droguett, Y. I. Zivkovic

HYDROLOGY IN HEAPLEACHING PROCESSES

INSTITUTO DE INGENIEROS DE MINAS DE CHILE

Seminario InternacionalInnovacin Tecnolgica en HidrometalurgiaExpomin, 2002

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Basic Statement

Bedthe

hout ThrougMovementSolution

,

LevelParticle

atReactionsChemical-Physico

fCu

R

R

MD

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HYDROLOGY = STUDY OF WATERMOVEMENT Irrigation Infiltration Redistribution Drainage Evaporation

Solute and Heat Transport are related topicsR

MD

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WATER TRANSPORT INPOROUS MEDIA

R

M

D

d

dhKD;K

z

D

zt

Richards Equation

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WATER RETENTION CURVE

R

M

D

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SOLUTE TRANSPORT IN POROUSMEDIA

Total Solute MassChange per Unit

Time= +

Net Solute FlowPassing throughthe ControlVolume

Sources andSinks in

the ControlVolume

RMD

SapS

Sap

cKcKc

cq

z

cD

zt

c

t

c

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EXPERIMENTALTECHNIQUES

RMD

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MEASURING THE CHARACTERISTICCURVES

RMD

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TENSION DISC INFILTROMETER

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DOUBLE-RING INFILTROMETER

RMD

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POROUS MEDIA Soil water retention curve is essentially a pore-size distributioncurve and hence is related to the particle-size distribution curve

Lalit Arya et. al. Soil Sci. Soc. Am. J. 63:5 1999).

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MODERN TRIAL COLUMN

RMD

Tensiometers Thermocouples Climonic devices Column Weight Flowmeters Data logger Dedicated computer

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RTD IN A 30 cm DIAMETER BY 2 mHEIGH COLUMN

RMD

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RTD IN A 27 m WIDTH BY2 m HEIGH HEAP

RMD

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SIMULATED RTD SIGNALS

MD

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MINIBOX LEACHING DEVICE

RMD

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DRAINAGE CONFIGURATIONCASE A: ONE CENTRAL DRAIN

RMD

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DRAINAGE CONFIGURATIONCASE B: FILTERING LAYER

RMD

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INDUSTRIAL HEAP

RMD

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SEGGREGATION DURING STACKINGCASE B: SEGGREGATED HEAP

RMD

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SEGGREGATION DURING STACKINGHYDRODYNAMIC EFFICIENCY

RMD

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HIGHLY CRACKED HEAP

RMD

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CRACKS IN FLOW MOVEMENTCASE A: NO CRACKS

RMD

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CRACKS WITHIN THE HEAPCASE B: 10 m DEEP, 30 cm WIDTH, 37

RMD

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EFFECT OF CRACKS IN FLOW MOVEMENTHYDRODYNAMIC EFFICIENCY

RMD

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CONCLUSIONS

RMD

Powerful Leaching Analysis Toolsare Available Nowadays.Modern Design, Optimization andControl Trials MUST Include theseTools.