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ESPACIO FOTOGRAFIA

(Opcional)

Laguna Seca - throughput increase since start-up

Noviembre, 2006

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Laguna Seca Concentrator

94.8%17313.2118121Actual

93%20213.9110000Design

Avail.P80WiTPD

%

+1.5%Control System

+1.8%Availability

+2%Pebbles Crusher

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3

Northern Chiles Atacama Desert,

160 km south east of Antofagasta.

Taltal

Inca de Oro

El Salvador

ChaaralARGE

NTINA

Coloso

Antofagasta

Mejillones

Zaldivar

Monturaqui

Escondida

Calama

Chuquicamata

CH

ILE

Tocopilla

Potrerillos

BOLIVIA

Worlds Premium Copper Region

Cerro Colorado

Quebrada BlancaCollahuasi

El Abra

ChuquicamataRadomiro Tomic

Michilla Lince

Mantos Blancos

El Tesoro

Escondida

Zaldivar

El SalvadorManto Verde

La Candelaria

El IndioAndacollo

Los Pelambres

El SoldadoAndina

Los Bronces El Teniente

Lomas Bayas

Spence

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Escondida

Norte

Oxide

Leach Pads

Main

Pit

Laguna SecaConcentrator

ZaldivarPit

Hamburgo

Tailings Dam

Los ColoradosConcentrator

5 kmN

Zaldivar Leach

Pads

Lixiviacion de

sulfuros

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5

Escondida Mine Pit

Fines Effect on TPOH (-1/2" )

Laguna Seca y Los Colorados (SAG3)

y = 44,648x + 542,83

R2

=0,6192

y =82,845x - 8,1522

R2 = 0,9401

0

1000

2000

3000

4000

5000

6000

20 30 40 50 60 70

minus 1/2" (%)

T

POH

LC_TPOH

LS_TPOH

Lineal (LC_TPOH)

Lineal (LS_TPOH)

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Concentradora Laguna Seca

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Laguna Seca ConcentratorSAG38 x 20

26,000 HP

Pebble Harnero

10 x 24

2 Pressure Distributor

Ball Mill25 x 40

18,000 HP

Pebble crusher

MP 1000

Magnetos

Cyclones Krebs

19 / pack

33 diam.

CV-22

8 Feders 1500 t/h

Crushed pebbles

Correa de retorno

Correa de Bypass

Over Ciclones

Al distribuidor

rougher

Fase IV Circuito de y Molienda de Mineral

2 Bombas SHDU 550 Warman

1100 Kw AFD / 5.277 m3/h

Bomba SHDU 750 Warman

1.850 Kw AFD / 9.772 m3/h

Tipic.

<

Tromell

Out : 1 max

> y < 1

8

SAG

38 x 20

26,000 HP

Pebble Harnero

10 x 24


Ball Mill25 x 40

18,000 HP

Pebble crusher

MP 1000

Magnetos

Cyclones Krebs

19 / pack

33 diam.

CV-22

8 Feders 1500 t/h

Crushed pebbles

Correa de retorno

Correa de Bypass

Over Ciclones

Al distribuidor

rougher


SAG

38 x 20

26,000 HP

Pebble Harnero

10 x 24


Ball Mill25 x 40

18,000 HP

Pebble crusher

MP 1000

Magnetos

Cyclones Krebs

19 / pack

33 diam.

CV-22

8 Feders 1500 t/h

Crushed pebbles

Correa de retorno

Correa de Bypass

Over Ciclones

Al distribuidor

rougher


2 Bombas SHDU 550 Warman

1100 Kw AFD / 5.277 m3/h

Bomba SHDU 750 Warman

1.850 Kw AFD / 9.772 m3/h

Tipic.

<

Tromell

Out : 1 max

> y < 1

8

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Layout de Equipos

38 SAG,

26,000 HP25 Ball Mills

18,000 HP

38 SAG,

26,000 HP25 Ball Mills

18,000 HP

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Tons per day

Laguna Seca Mill

0

20000

40000

60000

80000

100000

120000

140000

Ago-02

Oct

-02

Dic-02

Feb-

03

Abr-03

Jun-03

Ago-03

Oct

-03

Dic-03

Feb-

04

Abr-0

4

Jun-04

Ago-04

Oct

-04

Dic-04

Feb-

05

Abr-05

Jun-05

Ago-05

Oct

-05

Dic-05

Feb-

06

Abr-0

6

Jun-06

Fecha

TP

D

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TPOH Laguna Seca

Lagu na Seca Mill

2000

2500

3000

3500

4000

4500

5000

5500

6000

Ago-02

Oct-0

2

Dic-02

Feb-

03

Abr-03

Jun-03

Ago-03

Oct-0

3

Dic-03

Feb-

04

Abr-0

4

Jun-04

Ago-04

Oct-0

4

Dic-04

Feb-

05

Abr-05

Jun-05

Ago-05

Oct-0

5

Dic-05

Feb-

06

Abr-0

6

Jun-06

Fecha

TPO

H

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Maintenance improvement

Availability Laguna Seca

70

75

80

85

90

95

100

FY '03 FY '04 FY '05 FY '06

Avail. Planta

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Pebble Crusher

Pebbles crusher effect on throughput

5,164 5,0805,0444,847

4,1

1,7

0

1

2

3

4

5

6

Crushed By Pass Delta (%)

TPOH*1

000

WI : 13.1 ; SPI : 45.1 WI : 14.1 ; SPI : 57.4

TPOH

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Pebble CrusherTPOH

Improvement in operating and maintenance practices

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SAG EXPERT SYSTEM UTILIZATION

SAG expert system % of use

20,0

30,0

40,0

50,0

60,0

70,0

80,0

90,0

100,0

110,0

Week

%

%Util Exp Global

Availability Exp

TPOH

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Expert system % of use and optimization

Total act. de reglas: 7249

Per iod 1, 70% Exper t s ystem us e

61%

39%

Tonnage increase

Tonnage decreasePeriod 1 J an to May 2005

Original Expert System

Period 2: May to Oct 2005

Optimize Expert System

Total gain 1.5%

TPOH

Period 2, 95% Expert system use

95%

5%

Tonnage increase

Tonnage decrease

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Liner Design Evolution

N Date Begin Date End Lifter and Grates Duration Operating Variables Tonnes

1 02-Oct-02 13-Mar-03

60 Rows Lifter High and Low

18, Grate 38 mm slot, 14

5,4

Speed: between 8.0 and 10.7

RPM Median 9.9 RPM

Powerdraw: between 14 and 18

MW 10.416.000

2 13-Mar-03 11-Ago-03



5,1


RPM Median 9.9 RPM


MW 12.366.038

3 11-Ago-03 20-Nov-03



2,3


RPM Median 9.9 RPM


MW 8.376.695

4 20-Nov-03 15-Mar-04

60 Rows Lifter High 30 & 18

and Low 18, Grate 50 mm slot,

143,9


RPM Median 9.9 RPM


MW 11.078.115

5 15-Mar-04 18-May-04

48 Rows Lifter High 30 and

Low 18, Grate 65 mm slot, 14

2,2

Speed: between 9.0 and 9.7RPM Median 9.5 RPM


MW 7.128.520

6 18-May-04 25-Sep-04

60 RowsLifter High 30 & 30

and Low 18, Grate 65 mm slot,

144,3


RPM Median 9.7 RPM


MW 13.882.741

7 25-Sep-04 28-Feb-05

60 RowsLifter High 30 & 25

and Low 30, Mix Grate 65 & 70

mm slot, 14 & 205,1


RPM Median 9.6 RPMPowerdraw: between 13 and

17.5 MW 15.971.879

8 28-Feb-05 10-Ago-05


Low 30, Mix Grate 65 & 70 mm

slot, 14 & 205,1


RPM Median 9.5 RPM


MW 19.058.646

9 10-Ago-05 01-Feb-06


Low "Lomo", Grate 70 mm slot,206,1

Speed: between 8,9 and 9.4

RPM Median 9.2 RPM

Powerdraw: between 12 and 16MW 22.000.000

LINER DESIGN EVOLUTION

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Process and Maintenance Improvement

Replace the 7 foot Symons crusher by anMP1000.

Increased screen aperture

Screen modification and replacement

Increase liner angle and grate opening

Ceramic liners in trommel panels, cyclonesand piping

Change in operating practices

Ball mill trommels replace by retention rings Additional magnets and improvement ofmaintenance practice in pebbles crusher

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43.114.255

39.630.470

35.751.711

19.282.058

47,7

56

52,9

53,5

13,2

13,9

13,5

13,3

FY '06

FY '05

FY '04

FY '03

Tons

SPI

WI

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Laguna Seca Concentrator

92.5%17313.2118121Actual

94%125000Target

92%20213.9110000Design

Run timeP80WiTPD

10%Pre-crushing

Others

Control System

Pebble CrusherRun time

Goal

+1.0%

+1.5%+1.0%

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Aumento del dimetro de Bola molino SAGSimulacin en JkSimMet

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SAG CAMBIO DE DIAMETRO BOLAS

A

lim.

FrescaSAG

Periodo

Rango de durezas

Despue

sAntes

3-WI>

14

2-WI[

13-14

]

1-W

I

14

2-WI[

13-14

]

1-WI

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