Anglo Asian Mining PLC · LSE:AAZ
Anglo Asian Mining — World Gold, COM 2017
29 slides from Anglo Asian Mining's conference presentation, August 2017
Slide 1: Flotation and Leaching at Anglo Asian Mining's Gedabek Gold and Copper Mine in Azerbaijan
Flotation and Leaching at Anglo Asian Mining’s Gedabek Gold and Copper Mine in Azerbaijan A.J. Monhemius, F. Hedjazi & H. Saeedi Ali Presentation at World Gold, COM 2017, Vancouver, August 2017
Slide 2: Disclaimer
Disclaimer The information in this document is subject to updating, revision and amendment. This document neither constitutes nor forms nor should beconstructed as constituting or forming part of any offer or invitation to sell or any solicitation of any offer to purchase or to subscribe for any sec
Slide 3: Azerbaijan Geography
Azerbaijan Geography *Gedabek 3
Slide 4: Gedabek Ore Deposit
Gedabek Ore Deposit q The Gedabek Cu/Au ore deposit is situated on the Tethyan Mineralisation Belt in the the Lesser Caucasus mountains at an altitude of 1600m. q It is a porphyry-type copper-gold deposit, believed to have been formed by two phases of mineralisation: (i) older volcanogenic massive s
Slide 5: Gedabek Resources and Reserves
Gedabek Resources and Reserves q Current JORC compliant resource of 1.45 Moz of gold, 144Kton of copper and 10.46 Moz of silver. (June 2014) q Mineable reserve of 744 Koz of gold, 59.5 Kton of copper and 6.18 Moz of silver. 5
Slide 6: Ore Mineralisation
Ore Mineralisation Sulphide Ore Minerals: q Pyrite (FeS2) (dominant); Chalcopyrite (CuFeS2) (frequent); Sphalerite (ZnS), Covellite (CuS), Chalcosite (Cu2S), Bornite (Cu5FeS4), Galena (PbS), Arsenopyrite (FeAsS2) (minor). Py/cpy = 12 to 15 Oxide Ore Minerals: q Malachite, Azurite (Cu(OH) x (CO 3 ) y
Slide 7: Thiourea
ADR 10 lit/m2 SART Thiourea H2SO4 Heat BLS Max=100m3/hr Heap leach Cu Ag PLS Loaded HL resin Elution D80<70 mic pH>10 RT= 48 hr Agitation Crushing Grinding Leach RIP Enriched Solution Barren Solution 110 t/hr Stripped Resin Tailing Slurry Electro- winning Ore from Mine CN Lime Air Leach THK Tailing
Slide 8: Grinding
Grinding Process Water Leach THK Process Water to adjust the %S Screen Leach < 1mm S%= 40 110 t/hr 5-10 cm Crusher SAG Knelson Ball Tail Mill CN S%=65-70 Lime Concentrate S%=42-45 AIR CN>2000 pH=10.5
Slide 9: Leaching
Leaching Na CN Air Leach Thickener Slurry RIP %Solid = 40-43% Flow = 150 -170 m3/hr D80 < 75 micron Diameter = 11.5 m Height = 12 m Volume = 1100 m3 Total Retention Time = 45-49 hr Qty =7 Total Capacity = 7700 m3 ~ 4300 ton solid
Slide 10: Resin-in-Pulp
Loaded solution Resin-in-Pulp Heap leach Fresh resin Slurry Agitation Leach Resin > Slurry 1mm Solids < 100 micron Pump cell Diameter = 5.5m Slurry & Resin Height = 8.5 m Total Capacity= 1200 m3 Volume = 200 m3 Total Retention Time = 4 hrs Resin volume = 6 m3 Qty =6 Tailing Thickener Loaded resin AD
Slide 11: Gedabek Gold Plant
Gedabek Gold Plant Capacity : 1 mt/y (ore) Production: 2 t/y (Au)
Slide 12: General View
=— 4 ~- Orustiet :
Slide 13: Crusher
> wa N ANGLO ASIAN MINING PLC Crusher
Slide 14: Grinding Ball mills SAG
Grinding Ball mills SAG Hydrocyclones
Slide 15: Leach Tanks
> wa N ANGLO ASIAN MINING PLC Leach Tanks
Slide 16: Leach Tanks
~~ ANGLO ASIAN MINING PL Leach Tanks
Slide 17: RIP Pumpcells
RIP Pumpcells 17
Slide 18: SART Plant
SART Plant SART = Sulphidisation (S), Acidification (A), Recycling (R), Thickening (T) q Purpose of SART is to recover copper & silver (as sulphides) and recycle cyanide from gold leach solutions. q Main stages of the process are: (i) acidification and sulphidisation, (ii) copper sulphide precipitat
Slide 19: SART Process Flowsheet
— SART Process Flowsheet HSO, eee , Solution ml i NaSH 7777 > Treated Air i ‘ NaOH —>! 7 Flocculant } —s powcr tee qr rr tere rear rrrr ree > = 1 1 SART a : Scrubber Reactor oe Precipitate THK 7‘ Flocculant F 4 f f Ps ' Lime: f f ' i ' f f i Water Wash Treated Reactor Solution Ppt Filter Gypsum THK
Slide 20: Leaching followed by Flotation (L+F)
Leaching followed by Flotation (L+F) O/F Gedabek Grinding Open Pit Grinding Thickener High Mine Grade U/F Ore Low Grade Cu/Au Flotation Ore Concentate Resin-in- Agitation Flotation Pulp Leach Plant Loaded Eluted Resin Resin U/F Tailings Thickener ADR O/F Gold Doré Cu/Ag Sulphide PLS SART Concentrate
Slide 21: Flotation followed by Leaching (F+L)
Flotation followed by Leaching (F+L) O/F Gedabek Grinding Open Pit Grinding Thickener High Mine Grade U/F Ore Low Cu/Au Flotation Flotation Grade Concentrate Ore U/F Tailings Resin-in- Agitation Thickener Pulp Leach Plant O/F Loaded Eluted Resin Resin SART Cu/Ag ADR PLS Sulphide Pond Concentrate Gol
Slide 22: Location of Flotation Plant
Location of Flotation Plant 22
Slide 23: Interior of Flotation Plant
Interior of Flotation Plant 23
Slide 24: Results and Recoveries for (L+F)
Results and Recoveries for (L+F) Leaching plus Flotation (L+F) Ore Feed Rate 2153 ton/day Cyanide Consumption 4.54 kg/ton Grades Au (ppm) Ag (ppm) Cu (wt%) Ore feed 1.67 16.5 0.54 Leach tails 0.71 16.5 0.41 Flotation tails 0.42 11.0 0.25 Recoveries Au (%) Ag (%) Cu (%) Agitation Leaching 57.5 0.0 24
Slide 25: Results and Recoveries for (F+L)
Results and Recoveries for (F+L) Flotation plus Leaching (F+L) Ore Feed Rate 1843 ton/day Cyanide Consumption 3.74 kg/ton Grades Au (ppm) Ag (ppm) Cu (wt%) Ore feed 1.43 14.9 0.50 Flotation tails 0.73 9.3 0.19 Leach tails 0.32 9.3 0.13 Recoveries Au (%) Ag (%) Cu (%) Flotation 49.0 37.6 62.0 Agitati
Slide 26: Production Data for Concentrates
Production Data for Concentrates Plant Configuration Concentrate Analyses Production Cu (wt%) Au (ppm) Ag (ppm) Rate (t/d) L+F SART 52.3 0.4 423.0 5.3 Flotation 18.5 20.4 630.0 17.4 F+L SART 48.0 0.4 338.0 4.4 Flotation 16.1 27.3 370.0 27.0 26
Slide 27: Plant Configurations
Plant Configurations The plant is designed to be switched easily between (L+F) and (F+L) configurations. The decision on which scheme should be used is based on the economics of production, which is determined by the following factors: § Metal grades (Au, Cu) in the ore; § Metal prices; § Recovery o
Slide 28: Conclusions
Conclusions Flotation of the Gedabek copper-gold ore ahead of cyanide leaching, compared with leaching before flotation, leads to:- q 20% increase in copper recovery q 18% decrease in cyanide consumption q Small increases in gold and silver recoveries The decreased cyanide consumption and increased
Slide 29: Any Questions?
ANY QUESTIONS? 29