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Wellgreen Project Preliminary Economic Assessment ... - OTCIQ.com

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Test: LCT-3 <strong>Project</strong>: 50149-001 Date: 17-Apr-12 Operator: YW/Wei<br />

Purpose: Split flowsheet -Repeat LCT-1, No Cu/Ni Separation<br />

Procedure: As below. Ni Scav Tail C K 80 : 83 µm<br />

Feed: 6 x 2-kg of -10 mesh Master Composite Ni Scav Tail D K 80 : 80 µm<br />

Grind: 69 minutes /2 kg at 65% solids in the lab ball mill Ni regrind K80: 29 µm<br />

Regrind 10 minutes in the pebble mill<br />

Conditions:<br />

Reagents added, grams per tonne Time, minutes<br />

Stage Lime SIPX CuSO4 CMC Guar MIBC* Grind Cond. Froth pH Eh<br />

Grind - - - - - - 69<br />

Bulk Rougher 1 - 15 - - - 12 1 3 8.6 107.8<br />

Bulk Rougher 2 - 20 - - - 6 1 3 8.6 76.4<br />

Ni Scav 1 - 30 - - - 2 1 4 8.7 75.0<br />

Ni Scav 2 - 30 - - - 2 1 4 8.7 30.0<br />

Ni Scav 3 - 30 - - - 1 1 4 8.7 25.0<br />

4037<br />

Magnetic Separation on Ni Scav Tail<br />

Regrind Magnetic Concentrate 20 2 2 20<br />

Rougher - Magnetic 20 2 2 1 3<br />

Cleaner - Magnetic 2<br />

Bulk Cleaner (Combine Ro Conc 1-2) SIPX<br />

Bulk 1st Cleaner 1 - - - 12 12 - 2 8.5 78.1<br />

Bulk 1st Cleaner 2 - 10 - - - - 2 8.4 9.8<br />

Bulk 2nd Cleaner 1 - - 7 7 - 2 8.4 44.0<br />

Bulk 2nd Cleaner 2 - 5 - - - - 2 8.4 50.0<br />

Ni Cleaner (Combine Scav Conc 1-3) CuSO4<br />

Ni 1st Cleaner 1 - 20 15 15 - 1 3 8.7 85.0 1st cycle: 20 CMC / 20 Guar<br />

Ni 1st Cleaner 2 - 10 - - - - 1 3 8.7 55.0<br />

- - - -<br />

Regrind (PM) - - - - - - 10 1st cycle: 20min<br />

Ni 2nd Cleaner - 40+20 100 5 5 - 1 2+2 8.1 150.0 1st cycle: 50 SIPX / 40 A4037<br />

Ni 3rd Cleaner - 20+40 0+100 2 2 2 1 3+2 8.3 125.0 1st cycle: 20 SIPX / 50 CuSO4; 2nd cycle: 20 SIPX / 2 CMC / 2 Guar / 3min.<br />

Total 0 4247 100 45 45 25 99 10 37<br />

*As needed<br />

Stage Rougher 2nd clnr 3rd clnr<br />

Flotation Cell 2000 g D-12 500 g D-12 250 g D-12 PSA On Ni Regrind<br />

Speed: r.p.m. 1500 1600 1200 PSA Tails E<br />

PSA Tails F

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