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Minera EsperanzaMinera Esperanza

Sea water use in Antofagasta Mining GroupSea water use in Antofagasta Mining Group

FranciscoAbbott/GustavoTapia

Diciembre201

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Antofagasta Group

LSE-FREE

FLOAT35%

TRANSPORT

FCAB (Chi !"FCA (Bo i#ia"

Combined rail and road

tonnages of approx.8.3 million tons per year

Op!rating $in!s (Chi !"Los P! a &r!s ' Esp!ran a ' E T!soro ' $i)hi a

! *++,+++ tonn!s of )opp!r in )on)!ntrat! an )atho !s! ./+,+++ oun)!s of go

! 0,+++ tonn!s of o i& !nu in )on)!ntrat!E1p oration an !#a uations stu i!s in Chi !, 2nit!s Stat!s Pa4istan

Earn-in agr!! !nts in Europ!, Afri)a, th! A !ri)as an Austra ia

$ N NG 6ATER

Aguas ! Antofagasta(Chi ! )

Appro17 58 i ion 3 so p!r !ar

L29S C

Group/5%

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ni)ia n#!st !nt2S: .,*++ i ion*3.$ tons +75+%Cu,

+78;g

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>istor of th! pro?!)t

8;;; .+++ .++8 .++. .++3 .++= .++5 .++/ .++* .++0 .++; .+8+

8;;;A$SA starts its

!1p oration)a paigns

.++8

Cu

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"

+;

Transport 8=

Transport s st!

1 concentrate t#ic$ener %"&000 m'(2 #o)*ing tan$s %1&200 m' eac#(1 Ge#o pump %+,- $.(oncentrate pipe)ine %1," $m )engt#& + "*iameter(

P ant O#!r#i!

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-

S!a 6at!r in Esp!ran a

EB 3

ESPERAN AP ER

EB .EB 8

EB =

S

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8/15p> f otation 3

Eff!)ts on f otation pro)!ss

R o u g

h ! r r ! ) o # ! r 3 ,

%

p> f otation

Rough!r r!)o#!r #s p> using S!a at!r * AMIRA Project P968 Report

R o u g

h ! r r ! ) o # ! r 3 ,

%

Rough!r r!)o#!r #s p> using Tap at!r

* AMIRA Project P968 Report * AMIRA Project P968 Report

R!)o#!r using s!a at!r is aff!)t! & p>( AMIRA Project P968 Report )

On th! rough!r stag!, Cu r!)o#!r is notaff!)t!

$o r!)o#!r is strong aff!)t!

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9/15p> f otation 4

Eff!)ts on f otation pro)!ss

C ! a n ! r r ! ) o # ! r 3 , %

p> f otation

C !an!r r!)o#!r #s p> using S!a at!r

* AMIRA Project P968 Report

C !an!r r!)o#!r #s p> using Tap at!r

On th! ) !an!r stag!, Cu an $o r!)o#!r isstrong aff!)t!

A )on#!ntiona pro)!ss ith i ! is iffi)u t to)arr out

* AMIRA Project P968 Report

C ! a n ! r r ! ) o # ! r 3 , %

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2s! of $BS

A n! pro)!ss to !pr!ss P in sa in! at!ras !#! op! , uring th! pro)!ss !finition ofR!4o Di pro?!)t

Th! pro)!ss is prot!)t! & th! pat!nt2S8. to !pr!ss P in Cu-Au or!s

f otation

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Eff!)ts on S! i !ntation

S!tt ! rat! using s!a at!r is

aff!)t! & p>

Du! to th! us! of $BS inf otation )ir)uit, th! Ca . ion)on)!ntration an th!r!for th!p> t!n s to &! o !r than

thos! o&tain! in )on#!ntionaf otation pro)!ss ith i !

Larg!r unit ar!a is r! uir!

O#!rf o C arit #s f o) osag!

S!tt ! rat! #s f o) osag!

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6hat )o !s n!1t

Natura p> f otation pr!#!ntCa f otation

n ustria $o r!)o#!r #s f!! gra !

La&orator r!)o#!r #s p> f otation

* AMIRA Project P968 Report La&orator $o s! !)ti#! r!)o#!r

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Con) usions

Esp!ran a us!s ra s!a at!r su))!ssfu , that i p i!s a )o p!titi#! ! g! as ar!su t to o&tain at!r fro th! s!a in on! of th! ri!st p a)!s of th! or 7

Th!r! ar! not !#i !nt !ff!)ts on st!! )onsu ption

t is a fa)t that !ta&isu fit! )an &! us! to !pr!ss p rit! inst!a of i !, in th!f otation pro)!ss

>igh )opp!r, go an o & !nu r!)o#!r an a so )o !r)ia )on)!ntrat!gra !s )an &! o&tain! using s!a at!r

t is r! uir! a arg! unit ar!a in thi)4!ning pro)!ss

$o f otation sho s !1)! !nt r!su ts in )o !)ti#! an s! !)ti#! pro)!ss

Th! )orrosion !ff!)ts & s!a at!r ar! not signifi)ant in th! ! uip !nt anstru)tur!s7 t !ans that aint!nan)! )osts ar! si i ar than oth!r op!rations7

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Minera EsperanzaMinera EsperanzaSea water use in Antofagasta Mining GroupSea water use in Antofagasta Mining Group

Francisco Abbott / Gustavo Tapia

Diciembre 201