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DELKOR SOUTH AMERICA LIMITADA

FILTERING SYSTEMS FOR

DRY TAILINGS DEPOSITION

FILTERING SYSTEMS FOR

DRY TAILINGS DEPOSITION

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Topic Today

TAILINGS DEPOSITION

• BENEFITS DRY DEPOSITION.

• REVIEW OF WET vs DRY DEPOSITION.

• TYPES OF EQUIPMENT AVAILABLE.

• REVIEW OF EQUIPMENT COSTS.

• DETAILS OF EXISTING OPERATIONS.

• BENEFITS DRY DEPOSITION.

• REVIEW OF WET vs DRY DEPOSITION.

• TYPES OF EQUIPMENT AVAILABLE.

• REVIEW OF EQUIPMENT COSTS.

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TAILINGS DAM CONSIDERATIONS

COST WATER SUPPLY COST WET vs DRY DEPOSITION

RECLAMATION FOR FUTURE PROCESSING FINAL MOISTURE REQUIRED

SITE GEOLOGICAL FAULTS / SEEPAGE VALLEY ANGLE / CAPACITY

ROADS RIVERS

SEISMIC STABILITY COST

COST WATER SUPPLY COSTWATER SUPPLY COST WET

WET vsvs DRY DEPOSITIONDRY DEPOSITION

RECLAMATION FOR FUTURE PROCESSING RECLAMATION FOR FUTURE PROCESSING FINAL MOISTURE REQUIRED

FINAL MOISTURE REQUIRED

SITE

SITE GEOLOGICAL FAULTS / SEEPAGEGEOLOGICAL FAULTS / SEEPAGE VALLEY ANGLE / CAPACITY

VALLEY ANGLE / CAPACITY ROADS ROADS RIVERS RIVERS SEISMIC STABILITY SEISMIC STABILITY

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BENEFITS OF DRY DEPOSITION

Summary

• EXTENDED DAM LIFE

• IMPROVED WATER RECOVERY

• COMPACTED TAILS ALLOWS REVEGETATION

• GREATER DAM STABILITY

• NO SEEPAGE LOSSES

• COMPACTED TAILS EASIER TO RECOVER

• EASIER TO OBTAIN MINING PERMITS

•• EXTENDED DAM LIFE

EXTENDED DAM LIFE

•• IMPROVED WATER RECOVERY

IMPROVED WATER RECOVERY

•• COMPACTED TAILS ALLOWS REVEGETATION

COMPACTED TAILS ALLOWS REVEGETATION

•• GREATER DAM STABILITY

GREATER DAM STABILITY

•• NO SEEPAGE LOSSES

NO SEEPAGE LOSSES

•• COMPACTED TAILS EASIER TO RECOVER

COMPACTED TAILS EASIER TO RECOVER

•• EASIER TO OBTAIN MINING PERMITS

EASIER TO OBTAIN MINING PERMITS

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COST OF WET DAMS

1500 mt/day TAILS

8 YEAR DAM LIFE US$ 5.7 MILLION

1500

1500 mt

mt /

/ day

day TAILS

TAILS

8 YEAR DAM LIFE US$ 5.7 MILLION

CAPITAL CONSTRUCTION

US$

748.000.-Clearing, Excavation, Backfill, Drains, Piping...etc.

CAPITAL CONSTRUCTION

US$ 748.000.--

US$ 748.000.

Clearing

Clearing,, ExcavationExcavation,, BackfillBackfill,, DrainsDrains,, PipingPiping...etcetc..

OPERATING COSTS (8 year total)

US$

4.250.000.-Thickener 5 US c/ton. Pumping 40 US c/ton. Reclaim 40 US c/ton. Other Maintenance 12 US c/ton.

OPERATING COSTS (8

OPERATING COSTS (8 year

year total)

total)

US$ 4.250.000.--

US$ 4.250.000.

Thickener

Thickener 5 US c/ton.5 US c/ton. Pumping

Pumping 40 US c/ton.40 US c/ton. Reclaim

Reclaim 40 US c/ton.40 US c/ton. Other Maintenance

Other Maintenance 12 US c/ton.12 US c/ton.

NEW SITE (After 8 Years)

US$

748.000.- NEW SITE (After 8 Years)

US$

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748.000.-COST OF DRY DAMS

COST OF DRY DAMS

1500 mt/day TAILS

8 YEAR DAM LIFE US$ 4.25 MILLION

1500

1500 mt

mt /

/ day

day TAILS

TAILS

8 YEAR DAM LIFE US$ 4.25 MILLION

CAPITAL CONSTRUCTION

US$

1.452.000.-Filter Plant, Thickener, Conveyors...etc.

CAPITAL CONSTRUCTION

US$ 1.452.000.--

US$ 1.452.000.

Filter Plant

Filter Plant,, Thickener Thickener ,, ConveyorsConveyors...etcetc..

OPERATING COSTS (8 year total)

US$

2.800.000.-Thickener 5 US c/ton. Belt Filter 50 US c/ton. Conveyors/Trucks 20 US c/ton. Water Reclaim 4 US c/ton. Water Savings 20 US c/ton. Other Maintenance 5 US c/ton.

OPERATING COSTS (8

OPERATING COSTS (8 year

year total)

total)

US$ 2.800.000.--

US$ 2.800.000.

Thickener

Thickener 5 US c/ton.5 US c/ton. Belt Filter

Belt Filter 50 US c/ton.50 US c/ton. Conveyors

Conveyors//TrucksTrucks 20 US c/ton.20 US c/ton. Water

Water ReclaimReclaim 4 US c/ton.4 US c/ton. Water

Water SavingsSavings 20 US c/ton.20 US c/ton. Other Maintenance

Other Maintenance 5 US c/ton.5 US c/ton.

NEW SITE (After 8 Years)

NOT REQUIRE, DAM

HAS A 20 YEAR LIFE

NEW SITE (

NEW SITE (After

After 8

8 Years

Years))

NOT REQUIRE, DAM

HAS A 20 YEAR LIFE

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• THICKENERS : HIGH RATE & CONVENTIONAL

• HIGH DENSITY THICKENERS: HI-PAC

• HORIZONTAL BELT FILTERS

••

THICKENERS : HIGH RATE & CONVENTIONAL

••

HIGH DENSITY THICKENERS: HI -- PAC

HIGH DENSITY THICKENERS: HI

PAC

••

HORIZONTAL BELT FILTERS

DELKOR EQUIPMENT FOR TAILINGS TREATMENT

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Delkor Hi-Pac Thickener - 43 m. Toquepala

Delkor

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Belt Filters

This filter uses a horizontal belt

driven by a head pulley. Vacuum

is drawn through holes in the belt.

Throughput per unit area is high

and this equipment has generally

been accepted as the most

economical for the filtration of

tailings. Although final moistures

are similar to disc filters, they

have been found to be 1 – 2 %

points lower.

This filter uses a horizontal belt

driven by a head pulley. Vacuum

is drawn through holes in the belt.

Throughput per unit area is high

and this equipment has generally

been accepted as the most

economical for the filtration of

tailings. Although final moistures

are similar to disc filters, they

have been found to be 1

have been found to be 1 –

– 2 %

2 %

points lower.

Figure II : Horizontal Belt filter Schematic drawing

Figure II : Horizontal Belt filter Schematic Figure II : Horizontal Belt filter Schematic drawing

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Paste Thickener

Figure I : Schematic of a Delkor High Density unit for Underground Backfill Figure I : Schematic of a Delkor High Figure I : Schematic of a Delkor High Density unit for Underground Backfill Density unit for Underground Backfill This unit is similar in construction to a

normal thickener, but relies on additional residence time, higher walls and additional flocculant usage to achieve greater water recovery. Although this equipment cannot easily produce material for compaction, it does product a paste that can be suitable for underground fill or increase water recovery.

Unit capital and operating costs of the thickener are low, but the highly plastic properties of the paste create pumping

difficulties. As a result positive

displacement pumps have to be used for slurry transport. These pumps are of high capital and operating cost (> US$ 1 million), which frequently makes this disposal route uneconomical

This unit is similar in construction to a This unit is similar in construction to a normal thickener, but relies on additional normal thickener, but relies on additional residence time, higher walls and additional residence time, higher walls and additional flocculant

flocculant usage to achieve greater waterusage to achieve greater water recovery. Although this equipment cannot recovery. Although this equipment cannot easily produce material for compaction, it easily produce material for compaction, it does product a paste that can be suitable does product a paste that can be suitable for underground fill or increase water for underground fill or increase water recovery.

recovery.

Unit capital and operating costs of the Unit capital and operating costs of the thickener are low, but the highly plastic thickener are low, but the highly plastic properties of the paste create pumping

properties of the paste create pumping difficulties. As a result positive

difficulties. As a result positive

displacement pumps have to be used for displacement pumps have to be used for slurry transport. These pumps are of high slurry transport. These pumps are of high capital and operating cost (> US$ 1 million), capital and operating cost (> US$ 1 million), which frequently makes this disposal route which frequently makes this disposal route uneconomical

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LA COIPA

•

OPERATION

•

TAILS TYPE

•

FILTER CAKE

•

OPERATING

COST

•

PLANT WATER

REQUIREMENTS

• •

OPERATION

•

TAILS TYPE

•

FILTER CAKE

•

OPERATING

COST

•

PLANT WATER

REQUIREMENTS

Â

GOLD LEACH

RESIDUE

Â

TOTAL FEED + WASH

Â

21 % MOISTURE

Â

0.6 US$ / mton TAILS

Â

0.27 m

3

_{/ mton ROM}

Â

GOLD LEACH

RESIDUE

Â

TOTAL FEED + WASH

Â

21 % MOISTURE

Â

0.6 US$ / mton

0.6 US$ /

mton TAILS

TAILS

Â

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MANTOS BLANCOS

•

OPERATION

•

TAILS TYPE

•

FILTER CAKE

•

OPERATING COST

•

PLANT WATER

REQUIREMENTS

• •

OPERATION

•

TAILS TYPE

•

FILTER CAKE

•

OPERATING COST

•

PLANT WATER

REQUIREMENTS

Â

FLOAT TAILS

Â

CYCLONE SPLIT

Â

19 % MOISTURE

Â

0.3 US$ / mton TAILS

Â

0.43 m

3

_{/ mton ROM}

Â

FLOAT TAILS

Â

CYCLONE SPLIT

Â

19 % MOISTURE

Â

0.3 US$ / mton

0.3 US$ /

mton TAILS

TAILS

Â

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EQUIPMENT EQUIPMENT %% SOLIDS SOLIDS CAPITAL CAPITAL INVESTMENT INVESTMENT US$ US$ SUITABLE SUITABLE FOR FOR COMPACTION COMPACTION Thickener Thickener 5555 330 000330 000 NONO Hi Hi--PacPac Thickener Thickener 60 60 450 000450 000 NONO Vacuum

Vacuum FilterFilter 75--8075 80 900 000900 000 After 10After10 daysdays Pressure

Pressure FilterFilter 80--8580 85 2 000 0002 000 000 After 2After2 daysdays

EQUIPMENT TO PRODUCE A

COMPACTED TAILS

EQUIPMENT TO PRODUCE A

COMPACTED TAILS

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Thickener

1.3

1.3 330 000

330 000

Wet

Hi-Pac

Hi

Hi--Pac

Pac

Thickener

0.6

0.6 450 000

450 000

Wet

Vacuum Filter

Vacuum

Vacuum Filter

Filter

0.25

0.25 900 000

900 000

Dry

Pressure Filter

Pressure

Pressure Filter

Filter

0.18

0.18 2 000 000

2 000

000 Dry

Dry

EQUIPMENT EQUIPMENT

EQUIPMENT PLANT WATERPLANT WATERPLANT WATERUSAGEUSAGEUSAGE (m3

(m3

(m3 /ton ROM) /ton ROM) /ton ROM)

CAPITAL CAPITAL CAPITAL INVESTMENT INVESTMENT INVESTMENT (US$) (US$) (US$) TAILS TYPE TAILS TYPE TAILS TYPE

EQUIPMENT TO REDUCE WATER

CONSUMPTION

EQUIPMENT TO REDUCE WATER

CONSUMPTION

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EQUIPMENT

TYPE

FILTER PRESS

DISC FILTER

BELT FILTER

HIGH DENSITY

THICKENER

CAKE

(%

H2O)

(%

H2O)

CAPITAL

COST

(

US

$)

((

US

$)

15 % 15 % 15 % $ 2 000 000$ 2 000 000$ 2 000 000 22 % 22 % 22 % $ 900 000$ 900 000_{$ 900 000} 21 % 21 % 21 % $ 886 000$ 886 000_{$ 886 000} 35 % 35 % 35 % $ 450 000$ 450 000_{$ 450 000}

OPERATING

COST

(US$/

(US$/ mton)

mton))

mton

TOTAL

AFTER 8

YEARS

$ 0.913 $ 0.913

$ 0.913 $ 6.8 mill$ 6.8_{$ 6.8 mill}mill

$ 0.760 $ 0.760

$ 0.760 $ 4.9 mill$ 4.9_{$ 4.9 mill}mill

$ 0.395 $ 0.395

$ 0.395 $ 2.9 mill$ 2.9_{$ 2.9 mill}mill

$ 0.382 $ 0.382

$ 0.382 $ 2.5 mill$ 2.5_{$ 2.5 mill}mill

SUMMARY OPERATING & CAPITAL COSTS

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BELT FILTERS ON TAILINGS

OPERATION

(MT/DAY)

TAILS FILTER SIZE

MANTOS BLANCOS 10.000 CU 3 X 100M2 LA COIPA 18.000 AU 12 X 100M2 ZCCM 50.000 CU 26 X 80M2 GECAMINES 7.000 FE 6 X 80M2 ALAMO DORADO 4.000 AG 2 X 162M2 BUENAVENTURA 300 AG 1 X 158M2 LUISMIN 2.000 AU 2 X 64M2 MITTAL STEEL 4.500 FE 1 X 113M2 MILPO 10.800 CU 2 X 73M2

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