DELKOR SOUTH AMERICA LIMITADADELKOR SOUTH AMERICA LIMITADADELKOR SOUTH AMERICA LIMITADA

FILTERING SYSTEMS FOR DRY TAILINGS DEPOSITIONFILTERING SYSTEMS FOR FILTERING SYSTEMS FOR

DRY TAILINGS DEPOSITIONDRY TAILINGS DEPOSITION

Topic TodayTopic TodayTopic Today

TAILINGS DEPOSITIONTAILINGS 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.

• DETAILS OF EXISTING OPERATIONS.

TAILINGS DAM CONSIDERATIONSTAILINGS 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

COSTCOST WATER SUPPLY COSTWATER SUPPLY COST

WET WET vs vs DRY DEPOSITIONDRY DEPOSITION

RECLAMATION FOR FUTURE PROCESSINGRECLAMATION FOR FUTURE PROCESSING

FINAL MOISTURE REQUIREDFINAL MOISTURE REQUIRED

SITESITE GEOLOGICAL FAULTS / SEEPAGEGEOLOGICAL FAULTS / SEEPAGE

VALLEY ANGLE / CAPACITYVALLEY ANGLE / CAPACITY

ROADSROADS

RIVERSRIVERS

SEISMIC STABILITY SEISMIC STABILITY

BENEFITS OF DRY DEPOSITIONBENEFITS OF DRY DEPOSITION

SummarySummary

• 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 LIFEEXTENDED DAM LIFE

•• IMPROVED WATER RECOVERYIMPROVED WATER RECOVERY

•• COMPACTED TAILS ALLOWS REVEGETATIONCOMPACTED TAILS ALLOWS REVEGETATION

•• GREATER DAM STABILITYGREATER DAM STABILITY

•• NO SEEPAGE LOSSESNO SEEPAGE LOSSES

•• COMPACTED TAILS EASIER TO RECOVERCOMPACTED TAILS EASIER TO RECOVER

•• EASIER TO OBTAIN MINING PERMITSEASIER TO OBTAIN MINING PERMITS

COST OF WET DAMSCOST OF WET DAMS1500 mt/day TAILS

8 YEAR DAM LIFE US$ 5.7 MILLION

1500 1500 mtmt//day day TAILSTAILS

8 YEAR DAM LIFE US$ 5.7 MILLION8 YEAR DAM LIFE US$ 5.7 MILLION

CAPITAL CONSTRUCTION US$ 748.000.-

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

CAPITAL CONSTRUCTIONCAPITAL CONSTRUCTION US$ 748.000.US$ 748.000.--

ClearingClearing, , 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 MaintenanceOther Maintenance 12 US c/ton.12 US c/ton.

NEW SITE (After 8 Years) US$ 748.000.-NEW SITE (After 8 Years) US$ 748.000.-

COST OF DRY DAMSCOST OF DRY DAMS1500 mt/day TAILS

8 YEAR DAM LIFE US$ 4.25 MILLION

1500 1500 mtmt//day day TAILSTAILS

8 YEAR DAM LIFE US$ 4.25 MILLION8 YEAR DAM LIFE US$ 4.25 MILLIONCAPITAL CONSTRUCTION US$ 1.452.000.-

Filter Plant, Thickener, Conveyors...etc.

CAPITAL CONSTRUCTIONCAPITAL CONSTRUCTION US$ 1.452.000.US$ 1.452.000.--

Filter PlantFilter Plant, , ThickenerThickener, , 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.

ConveyorsConveyors//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 MaintenanceOther Maintenance 5 US c/ton.5 US c/ton.NEW SITE (After 8 Years) NOT REQUIRE, DAM

HAS A 20 YEAR LIFENEW SITE (NEW SITE (After After 8 8 YearsYears)) NOT REQUIRE, DAM NOT REQUIRE, DAM

HAS A 20 YEAR LIFEHAS A 20 YEAR LIFE

• THICKENERS : HIGH RATE & CONVENTIONAL

• HIGH DENSITY THICKENERS: HI-PAC

• HORIZONTAL BELT FILTERS

•• THICKENERS : HIGH RATE & CONVENTIONALTHICKENERS : HIGH RATE & CONVENTIONAL

•• HIGH DENSITY THICKENERS: HIHIGH DENSITY THICKENERS: HI--PACPAC

•• HORIZONTAL BELT FILTERSHORIZONTAL BELT FILTERS

DELKOR EQUIPMENT FOR TAILINGS TREATMENTDELKOR EQUIPMENT FOR TAILINGS TREATMENTDELKOR EQUIPMENT FOR TAILINGS TREATMENT

Delkor Hi-Pac Thickener - 43 m. ToquepalaDelkor Delkor HiHi--PacPac ThickenerThickener -- 43 m. 43 m. ToquepalaToquepala

Belt FiltersBelt FiltersBelt 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 This filter uses a horizontal belt driven by a head pulley. Vacuum driven by a head pulley. Vacuum is drawn through holes in the belt. is drawn through holes in the belt. Throughput per unit area is high Throughput per unit area is high and this equipment has generally and this equipment has generally been accepted as the most been accepted as the most economical for the filtration of economical for the filtration of tailings. Although final moistures tailings. Although final moistures are similar to disc filters, they are similar to disc filters, they have been found to be 1 have been found to be 1 –– 2 % 2 % points lower.points lower.

Figure II : Horizontal Belt filter Schematic drawingFigure II : Horizontal Belt filter Schematic Figure II : Horizontal Belt filter Schematic drawingdrawing

Paste ThickenerPaste ThickenerPaste Thickener

Figure I : Schematic of a Delkor High Density unit for Underground BackfillFigure I : Schematic of a Delkor High Figure I : Schematic of a Delkor High Density unit for Underground BackfillDensity 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 flocculantflocculant usage to achieve greater water usage 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 uneconomicaluneconomical

LA COIPALA COIPALA COIPA

• OPERATION

• TAILS TYPE

• FILTER CAKE

• OPERATING COST

• PLANT WATER REQUIREMENTS

•• OPERATIONOPERATION

•• TAILS TYPETAILS TYPE

•• FILTER CAKEFILTER CAKE

•• OPERATING OPERATING COSTCOST

•• PLANT WATER PLANT WATER REQUIREMENTSREQUIREMENTS

GOLD LEACH RESIDUETOTAL FEED + WASH

21 % MOISTURE

0.6 US$ / mton TAILS

0.27 m3 / mton ROM

GOLD LEACH GOLD LEACH RESIDUERESIDUETOTAL FEED + WASHTOTAL FEED + WASH

21 % MOISTURE21 % MOISTURE

0.6 US$ / 0.6 US$ / mtonmton TAILSTAILS

0.27 m0.27 m33 / / mtonmton ROMROM

MANTOS BLANCOSMANTOS BLANCOSMANTOS BLANCOS

• OPERATION

• TAILS TYPE

• FILTER CAKE

• OPERATING COST

• PLANT WATER REQUIREMENTS

•• OPERATIONOPERATION

•• TAILS TYPETAILS TYPE

•• FILTER CAKEFILTER CAKE

•• OPERATING COSTOPERATING COST

•• PLANT WATER PLANT WATER REQUIREMENTSREQUIREMENTS

FLOAT TAILS

CYCLONE SPLIT

19 % MOISTURE

0.3 US$ / mton TAILS

0.43 m3 / mton ROM

FLOAT TAILSFLOAT TAILS

CYCLONE SPLITCYCLONE SPLIT

19 % MOISTURE19 % MOISTURE

0.3 US$ /0.3 US$ / mtonmton TAILSTAILS

0.43 m0.43 m33 // mtonmton ROMROM

EQUIPMENTEQUIPMENT%%

SOLIDSSOLIDS

CAPITALCAPITALINVESTMENTINVESTMENT

US$US$

SUITABLESUITABLEFOR FOR

COMPACTIONCOMPACTIONThickenerThickener 5555 330 000330 000 NONO

HiHi--PacPacThickenerThickener

6060 450 000450 000 NONO

VacuumVacuum FilterFilter 7575--8080 900 000900 000 AfterAfter 10 10 daysdays

PressurePressure FilterFilter 8080--8585 2 000 0002 000 000 AfterAfter 2 2 daysdays

EQUIPMENT TO PRODUCE A COMPACTED TAILS

EQUIPMENT TO PRODUCE A EQUIPMENT TO PRODUCE A COMPACTED TAILSCOMPACTED TAILS

ThickenerThickenerThickener 1.31.3 330 000330 000 WetWet

Hi-PacHiHi--PacPacThickenerThickenerThickener

0.60.6 450 000450 000 WetWet

Vacuum FilterVacuumVacuum FilterFilter 0.250.25 900 000900 000 DryDry

Pressure FilterPressurePressure FilterFilter 0.180.18 2 000 2 000 000000 DryDry

EQUIPMENTEQUIPMENTEQUIPMENTPLANT WATERPLANT WATERPLANT WATER

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

CAPITALCAPITALCAPITALINVESTMENTINVESTMENTINVESTMENT

(US$)(US$)(US$)TAILS TYPETAILS TYPETAILS TYPE

EQUIPMENT TO REDUCE WATER CONSUMPTION

EQUIPMENT TO REDUCE WATER EQUIPMENT TO REDUCE WATER CONSUMPTIONCONSUMPTION

EQUIPMENTEQUIPMENTEQUIPMENTTYPETYPETYPE

FILTER PRESSFILTER PRESSFILTER PRESS

DISC FILTERDISC FILTERDISC FILTER

BELT FILTERBELT FILTERBELT FILTER

HIGH DENSITYHIGH DENSITYHIGH DENSITYTHICKENERTHICKENERTHICKENER

CAKECAKECAKE(% H2O)(%(% H2O)H2O)

CAPITALCAPITALCAPITALCOSTCOSTCOST(US$)((USUS$)$)

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

OPERATINGOPERATINGOPERATINGCOSTCOSTCOST

(US$/(US$/(US$/ mton)mtonmton))TOTALTOTALTOTAL

AFTER 8AFTER 8AFTER 8YEARSYEARSYEARS

$ 0.913$ 0.913$ 0.913 $ 6.8 mill$ 6.8 $ 6.8 millmill

$ 0.760$ 0.760$ 0.760 $ 4.9 mill$ 4.9 $ 4.9 millmill

$ 0.395$ 0.395$ 0.395 $ 2.9 mill$ 2.9 $ 2.9 millmill

$ 0.382$ 0.382$ 0.382 $ 2.5 mill$ 2.5 $ 2.5 millmill

SUMMARY OPERATING & CAPITAL COSTSSUMMARY OPERATING & CAPITAL COSTSSUMMARY OPERATING & CAPITAL COSTS

BELT FILTERS ON TAILINGSBELT FILTERS ON TAILINGSOPERATION (MT/DAY) TAILS FILTER SIZE

MANTOS BLANCOS 10.000 CU 3 X 100M2LA COIPA 18.000 AU 12 X 100M2ZCCM 50.000 CU 26 X 80M2GECAMINES 7.000 FE 6 X 80M2ALAMO DORADO 4.000 AG 2 X 162M2BUENAVENTURA 300 AG 1 X 158M2LUISMIN 2.000 AU 2 X 64M2MITTAL STEEL 4.500 FE 1 X 113M2MILPO 10.800 CU 2 X 73M2