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DISEO, SIMULACIN Y

OPTIMIZACIN DE UN CIRCUITO DEMOLIENDA SAG UTILIZANDO EL

SIMULADOR JKSimMet

(2) Split Engineering Chile Ltda.

Calle General Salvo #331 oficina 201Providencia - Santiago, CHILEFono: (56)-(2)-5978200Fax : (56)-(2)-5978206http://www.spliteng.com

(1) Split Engineering LLC.

110 S. Church Avenue, Suite 8312 CP 85701Tucson Arizona, USAFono: (1)-(520)-3273773Fax : (1)-(520)-3267532http://www.spliteng.com

Tom BoBo1, Sebastin Urrejola2, Cristian Rodrguez2

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Energy consumption Total energy consumption in Chile by mining industry

represent 34.1%

- 1% increase on a 100.000tpd of porphyry copper

increase revenue over US$2M

Optimize your process!

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How we do it? Changes in technology or introduction of new

technologies Improvements in technology, its application and

operating practice.

This involve:

Increase throughput, and value production Improve downstream process performance Combination of these

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Perform a plant-scale test work Difficult or even inconclusive results

Simulation as an optimization tool

OPTIMIZATION WAYS

y o exp ore eren scenar os qu c y anefficiently Answer the what if?questions

JKSimMet Simulation Software Package!

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Characterize the feed material JKDWT

Estimate machine parameters

WHAT DO WE NEED?

AG/SAG mill model

Let the simulations begins!

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JK DROP WEIGHT TEST

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AG/SAG MILL ORE PARAMETERS

( )Ecsb10

e1At

=

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AG/SAG MODEL IN JKSimMet

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CALIBRATING THE MODELS

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SIMULATE

After calibration, the model will match the actual mill moreclosely than the default model would. At this point, themodel can be used for simulation, i.e. To calculate theeffect of the model parameters on the throughput andproduct of the mill. For instance, the model can show theeffect of changes in the ball charge, the use of a pebble

The variable rate AG/SAG model in the JKSimMet packageallows simulation of the effect of the following variables:

Ore grindability Throughput Feed size distribution Mill geometry

Ball size Grate configuration Ball charge

Mill speed

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SIMULATE

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CASE OF STUDY

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THROUGHPUT

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SAG MILL POWER UTILIZATION

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CONCLUSIONS

Modern computer technology has made it possible to supplypowerful modeling software to the plant engineer.

Combined with the ore characterization techniques asJKDWT to rovide a article breaka e function to measure

the grindability, the grinding circuit operator now has thetools to optimize each component of the grinding circuit

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CONCLUSIONS

Using a range of models of circuit and concentrator

operation, we can in principle optimize operation of:

A comminution circuit with respect to product size,throu h ut or ener utilization.

A comminution circuit with respect to downstreamrecovery. A complete mine concentrator operation with respect

to particular productivity criteria.