5c aurex materialselection ver1 1

8/18/2019 5C AurEx MaterialSelection Ver1 1

1/5

Materials Selection

EquipmentModes of

Operation

Characteristics

of Feed/

Product

Materials of

constructionRationale

Coarse Ore Bin

Ore bin is applied

to Jaw Crusher as

a transferring

machine of the

raw material

needed for the

process.

Gold bearing

oreCarbon steel

Carbon Steel isharder and

has high

tensile

strength as it

has a higher

percentage of

Carbon in it.

The carbon

content

ranges from0.5 – 2%

Jaw Crusher (Primary

Crushing)

It serves as the

primary crusher

of the process. It

is followed by

other types of

crushers.

The two jaws of

the crusher is

used to crush theore. It is usually

made by sections

for easy

transportation.

Heavy mining,

quarried

materials,

sand and

gravel, gold

bearing ore.

Carbon Steel

Cheap but

versatile

equipment. It

has the

capacity to

withstand

heavymaterials.

Secondary Cone Crusher

The crushed ore

from the primary

crusher uses

secondary cone

crusher to breaks

the ore between

gyrating spindle.

Large pieces of

ore are broken

once, and then

fall to a lower

position where

they are broken

again. This

process

continues until

the pieces are

Small piece

gold bearing

ore as the

product

Carbon Steel

It has high

productivity,

easy

adjustment

and lower

operational

costs. It makes

the hard ore

semi-crushed

easy for the

ball mill to

grind for final

crushing.


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small enough to

fall through the

narrow opening

at the bottom of

the crusher.

Ball Mill (grinding)

It is used for the

final grinding and

blending of the

ores that is to be

used for the

whole process.

The size

reduction is doneby impact as the

balls drop from

near the top of

the shell.

Semi-crushed

ore from the

Cone crusher

will be the

feed. Fine

particles orpowder like is

made.

Carbon steel

The cost of

installation

and grinding

medium is

low. it is

suitable for

both batch

and

continuous

operation. It isapplicable for

all degress of

hardness

whether wet

or dry feed.

Hopper

All the material

inside the hopper

moves down the

walls and exits

upon reaching itscapacity. The

flow is based

upon a first-in,

first-out principle

and is uniform

and reliable upon

discharge. For

this process, a

conical type of

hopper is used totransfer the

particles to the

cyclones.

Fine particles

as the feed

Stainless

steel

It is used for

handling the

fine particles

of ore and act

as the feeder

to the

cyclones. It is

usually used

to handle

large quantity

of material.

Cyclones

A high speed

rotating air flow

within a conical

container called

the cyclone. Air

flows from the

top to thebottom. Larger

Small filtered

particlesCarbon steel

It is used to

separate

particulates

from source

without the

use of filters.


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particles fall to

the bottom upon

striking the walls

of the cyclone

where it will be

removed and

smaller particles

will be the

product.

Leaching tanks

Crushed fine ore

particles are

placed on tanks.

Thiosulfate

solution is placedat the top of the

tank and injected

oxygen from air.

The solution

percolates down

through the tank

and leaches

out the gold. The

gold laden

pregnantsolution drains

out from the

bottom

of the pile and is

collected for gold

recovery.

Fine crushed

ore particles

as the feed

Stainless

steel

It is

introduced asa means of

reducing gold

recovery

costs. The

process has

found wide

favor, due to

the vastly

reduced

processingcosts

compared

with agitated

leaching.

Lime Silo

Lime for

tetrathionate

degradationsince the

tetrathionate

anions

displace the gold-

thiosulfate and

optionally the

copper

thiosulfate

complexes from

the resin Withthe thiosulfate

Slurry feedStainless

steel

Stainless steel

is used as a

lime silo to

ensure and

prevent stains

or corrosion

and rusting

upon touching

the solution.


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stabilizing the

eluted gold and

optionally eluted

copper and

the sulfite

preventing the

precipitation of

elemental sulfur..

Adsorption Columns

Columns are

charged with a

strong base

anion resin for

anion exchange.

Gold is adsorbed

onto solid

spherical resinbeads.

Gold bearing

or copper

bearing eluate

Stainless

steel

It is used to

significantly

recover gold.

Leaching

operations to

recover gold

always have

adsorptioncolumns.

Electrowinning Cell

Electrowinning is

a process done

to remove

impurities from a

metal. It involves

the

electrodeposition

of metals from

their ores that

have been placed

in aa solution by

leaching.

Gold

concentrate

Non-

conducting

plasticmaterial

(PVC)

Electrowinning

cells must be

non-

conductive in

nature so as to

not interfere

with the

electrical

distributioninvolved in the

process. It also

has to be

noncorrosive

due to the

acid mist

formation

within the cell.

Furnace

Goldconcentrates are

placed into

furnaces in order

to form them as

ingots.

Gold Ingots

Propane

fired

bricks/clay

Furnace

materialshould be able

to produce a

flame

temperature

of about 1260

ᵒC.

Solid - Liquid Separator

Tailings from

adsorption is

used for the

solid-liquidseparator. Solid

Fine rocks

from tailings

solution and

recoveredammonium

Stainless

Steel

Solid Liquid

separator is

used for water

recovery backto the process


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residue is

washed and the

thiosulfate

solution is

treated with zinc

concentration to

recover gold. The

treated solution

is then

introduced to the

leaching tank and

as the product is

used as a

fertilizer.

thiosulfate and to

minimize

consumption

of water

resources. The

performance

of solid liquid

separator is

impotant to

the success of

any gold

recovery

operation.

5c aurex materialselection ver1 1

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