Types | Gold Ore Processing | Rodger Allen Gold Mine

Processing Gold Ores By Rodger Allen Gold Mine

Gold ore processing Ore Preparation •

Gold liberation •  Extraction

•  Particle

size adjustment to next processes

•  Physical

concentration and oxidation pretreatment

of gold from ore into solution and/or concentrate

Gold Production

Gold Purification

Gold Extraction •

 Purification of gold bearing solution

•

Recovery of gold from solution or concentrate to produce a bulliion bar 

Process development for gold ores

Process development

Process design Geology

(ndustrial processes

Process routes Feed

Primary !rushing

Project context

"econdary !rushing

$all Milling

hic%ening

Pre&aeration

Mineralogy

?

"#G Milling

echnological tests

!arbon&in& leach

Elution

Electro'inning

"melting

GOLD

 

Gravity !oncentration

To smelting

Feed

Primary !rushing

"econdary !rushing

"#G Milling

$all Milling

Rod Milling

#gglomeration

hic%ening

,eap Oxidation

+lotation

)or pebble mill*

 

Gravity !oncentration

To smelting

t

c

,eap -eutralization

Roasting

,eap !yanidation

!arbon&in& column

 

$io&oxidation

Pre&aeration

Pre&aeration

!arbon&in& leach

!yanidation

!arbon&in& leach

!yanidation

!!.

!arbon&in& pulp

!!.

!arbon&in& pulp

Elution

Electro'inning

Pressure Oxidation

Elution

inc Precipitation

Electro'inning

"melting

Elution

inc Precipitation

Electro'inning

Fazenda Brasileiro ore  Main

ore characteristics



deposit type: “greenstone belt”



mineralogy: fine gold (d 9!"# microns

%$free or in borders&fract'res% associations ith s'lphides and )'art*  laboratory tests: high reco+eries for both direct cyanidation and flotation% good reco+ery in gra+ity concentration

Feed

Primary !rushing

"econdary !rushing

Fazenda Brasileiro ore  ,on+entional

process ro'te

"#G Milling

$all Milling

hic%ening

Pre&aeration

!arbon&in& leach

Elution

Electro'inning

"melting

 

Gravity !oncentration

To smelting

Refractory sulphide ore  Main 

ore characteristics deposit type: “greenstone belt”

mineralogy: +ery fine gold(d 9!" microns$% encaps'lated and in borders&fract'res% association ith s'lphides  laboratory tests: lo reco+eries in direct cyanidation and gra+ity concentration tests% high reco+eries in flotation tests% high reco+eries by cyanidation after bio-o.idation or press're o.idation 

Feed

Primary !rushing "econdary !rushing

"#G Milling

$all Milling

Refractory sulphide ore

+lotation Tailings $io&oxidation

!yanidation

 /rocessing

ro'te ith pretreatment

!arbon&in& pulp

Elution

Electro'inning

"melting

Placer ore  Main

ore characteristics



deposit type: “placer”



mineralogy: medi'm si*e gold(d 9!011 microns$% some physically liberated% some associated ith s'lphides

Feed

Primary !rushing

"econdary !rushing

Placer ore

$all Milling

hic%ening

 /hysical

only processing ro'te

+lotation

"melting

GOLD

 

Gravity !oncentration

To smeltin smelting g

  e  Process routes   g    d    l  e   (   o    2  n

Knowledge uilding

combined 30!0

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Geology

,ontradictions management and feedbac2

0122 variables 322 rules

A gold mine in the Amazon  5garap6 

7ahia Mine

Largest 7ra*ilian gold mine 

01-04 tons of gold&year 

8ery lo cash cost  Located in the ,araas eser+e 

Forest reser+e area oned by a mining m ining company - ,8D  Only 1;