Geologia Del Deposito Antamina

ANTAMINA

Antamina: a world class operation

33.75%

33.75%

10 % 22.5%

LOCATION

Huaraz

N

Huascarán Park

PUERTO

MI

NE

RO

C DU

TO

Conococha

Pipeline Route Existing Road New/Upgraded Road

P ic if ac O an c e

“Punta Lobitos”

Antamina

0 Paramonga Lima 150km

10

20

kilometres

Location

- Mine site: Eastern Andes, between 4,300 and4,700 m.
- Pipeline: 302 km. - Port site: Western range of the

Andes.

View from North to South

East

South

Phase III
Crusher

Phase II

Phase IV

Phase I

ORE TYPES
HEAD GRADES ORE TYPE M1: Cu low Bi M2: Cu High Bi M2A: Cu High High Bi M3: Cu-Zn low Bi M4: Cu-Zn High Bi M4A: Cu-Zn High High Bi M5: Bornite Low Zn M6: Bornite High Zn Cu (%) > 0.5 > 0.5 > 0.5 > 0.5 > 0.5> 0.5 > 0.5 > 0.5 Zn (%) 0.5 < 0.5 > 0.5 Bi (ppm) < 25 > 25 < 200 > 200 < 25 > 25 < 200 > 200 WITT WITT PRODUCTS Cu low Bi Conc. & Mo Conc Cu med Bi Conc. & Mo Conc Cu High Bi Conc. & Mo Conc Cu Conc, Zn Conc.& Pb/Bi Conc Cu med Bi Conc, Zn Conc.& Pb/Bi Conc Cu med Bi Conc, Zn Conc.& Pb/Bi Conc Cu Conc > 40% Cu Conc > 40% & Zn Conc

WITT: Wittichinitic ore that will not be processed in the BiCleaning circuit

Concentrator
80,000 tonnes per day

OVERVIEW
MINE
Cu GRINDING CIRCUIT FLOTATION CIRCUIT Cu Cu LOW BI STORAGE P TANKS & I Cu HIHG Bi P E THICKENERS L Zn Zn I THICKENER STORAGE N E TANKS BULK CONCENTRATE

FILTERS

Mo/Bi FLOTATION CIRCUIT

STORAGE SHED SHIP

Zn FLOTATION CIRCUIT

PRODUCTION PLANNING
MINE – CONCENTRATOR – PORT - MARKETING

• Annual Plan • 90days forecast monthly updated. • Twice a week Production review

CHANGING ORE TYPES
MINIMIZING CROSS CONTAMINATION

• Mine advise the start of a new campaign . • Concentrator start to take samples of U/F of bulk thickener every 2 hours. • We treat Bi or Mo according with ore type. • Start sampling U/F of Cu thickener each 2 hours. • According with contents we storage on pipeline tanks. • Portseparate the filtrated production into different stock piles in the shed. • Program blending during the ship loading

Grinding Circuit
Pile of Ore (2)) Capacity 50,000 t live

For Low Bi Ores M1, M2, M3
Cyclones cluster (3) To Flotation Circuit

Appron Feeder (6)

Recirculation Canon of Course ore

For High Bi Ores M2A, M4,M4A,M5,M6
SAG MILL (1)) 11.6m dia x 5.8m EGL BALL MILLS (3)7.3m dia x 10.8m

Design Criteria
70,000 tpd @ 90% Ability Grinding @ 80% Cu Ore 150 um Cu/Zn Ore 100 um Pumps to Feed the Cyclones cluster (3)

Copper Flotation Circuit
Columns cells 1st cleaner Rougher OK 130 Cyclones Cluster Thickener Bulk Concentrate 2 Vertimills 746 kw (2) Scavenger OK 130 Columns de 2nd cleaner

To Zinc Circuit or to the tailings pound

Over flow to tailings ToBi/Mo storage tanks

Design Criteria of the Circuit
Head grades 2.5% Cu, 4.0% Zn Regrinding @ 80% = 45 um

We monitoring the U/F and chose a tank

Mo/Bi Flotation Circuit
Bulk Concentrate Rougher OK 14

To Cu High Bi Thickener

To Pipeline Storage Tanks Cyclones Cluster According to analysis of Bi & As

Mo

Bi
1 Vertimill

To Cu Low Bi Thickener

Bulk Concentrate Storage tanks 1for Bi, 1 for Mo

3 stages of Cleaners Columns

To Pipeline Storage Tanks According to analysis of Bi & As Mo/Bi Thickeners of 6.2m dia

To Mo/Bi Filter and Packing system 1ton Bags

CLEAN UP OF THE Bi/Mo CIRCUIT
• Between campaigns we clean thickener, cells and boxes. • The only problem is Lead in Mo concentrate. • This happened when is the change of campaign from Bi to Mo. • For Bitreatment we doesn’t need clean up the circuit because we haven’t contamination. • For Bi flotation we depress the copper with NaCN and for Mo Flotation with NaSH.

Zinc Flotation Circuit
Columns 1st cleaners (5) 4.3m dia

Rougher OK 130 m3 (24 Celdas)

Columns 2nd cleaners(5) 4.3m dia

Cyclones (10) 381mm dia Zn thickener Concentrate, 34m dia

Vertimills 746 kw (2)

Scavenger OK 130...