TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirFlash Flotation process

What is Flash Flotation? When should Flash Flotation be considered? What equipment is used?

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirDefinition

Flash Flotation is the instantaneousflotation of valuable mineral particles from the grinding circuit

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirWhen Flash Flotation

Valuable minerals are soft in

comparison to host rock Valuable mineral has a significantly higher solids s.g. compared to the host rock and may concentrate in recirculating load

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirHistory1982198419841984199019911992199619972000-08-22

SK-80 (prototype) SK-80 SK-240 (prototype) SK-240 SK-500 (prototype) SK-500

Hammaslahti Mine Selbaie, Canada Vuonos Mine LKAB Viskaria, Sweden Gold Fields, RSA BHP Ok Tedi, Papua New Guinea

SK500 Dual Outlet Technology Macraes Gold, New Zealand Flash Roughing SK-1200 Dual Outlet Technology (prototype) Flash Roughing SK-1200 Dual Outlet Technology Northparkes, Australia Northparkes, Australia4

FlashFlotationSkimAir.ppt/Tle

TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirProduct familySize Ranges SK-80 SK-240 SK-500 SK-1200 Feed Rate 80 MTPH 240 MTPH 500 MTPH 1200 MTPH

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirConventional Flash FlotationWater Addition To Flotation

SkimAir Water Addition

Final Concentrate

Water Addition

SAG Mill

New Feed

Ball Mill

We look for grade2000-08-22 FlashFlotationSkimAir.ppt/Tle 6

TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirFlash RoughingWater Addition To Flotation Level control from the upper outlet only SkimAir Dual Outlet Recycle Water Addition

Density Measurement for underflow control Ball Mill Rougher Concentrate

SAG Mill

New Feed

We look for recovery2000-08-22 FlashFlotationSkimAir.ppt/Tle 7

TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirSkimAir

Benefits

Minimal overgrinding Improved overlay recovery Increased mill throughput Improved dewatering

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirSkimAir

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirDual outlet SkimAirUpper Outlet

Pinch valve maintaining level control and directing flow to cyclone feed pump box

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirDual outlet SkimAirDensity measurement for underflow control

Lower Outlet

Polyurethane sleeve pinch valve regulating flow to mill

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirSkimAir concentrate

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TECHNOLOGY

i n e r a l P r o c e s s i n g

Flash Flotation + SkimAirOperating parameters

Feed density Feed rate Flotation air Froth depth Reagents2000-08-22 FlashFlotationSkimAir.ppt/Tle 13