Engineering & Mining Journal

FEB 2013

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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NEWS-CALENDAR OF EVENTS (Regional News-Africa - from p. 18) years based on probable a mineral reserve of 29.4 million mt at a grade of 1.42 g/mt gold containing 1.34 million oz of gold. Average annual gold production for years one to five is estimated at 141,000 oz/y at an operating cash cost of $524/oz; average life-of-mine gold production is estimated at 112,000 oz/y at an operating cash cost of $689/oz. Pre-production capital cost is estimated at $244.2 million. Based on current projections, the project would begin production in late 2014. Run-of-mine ore from the Otjikoto openpit will be delivered by 100-mt trucks to a primary crushing plant consisting of a gyrato- ry crusher and conveyor system that will feed a coarse ore stockpile. Stock-piled material will be reclaimed and treated through a SAG mill/secondary ball mill grinding circuit. The ball mill discharge stream will be treated in a gravity concentration circuit for recovery of coarse gold. The gravity concentrate will be processed in an intensive leach circuit. The gravity tailings product will be thickened to 45% solids and treated in a cyanide leach circuit. The leach product stream will be pumped to a carbon-in-pulp (CIP) circuit for recovery of gold in solution. Gold will be recovered from the loaded carbon in a split AARL [Anglo American Research Laboratories] elution circuit. Gold solutions from the gravity intensive leach circuit and elution circuit will be treated by an electrowinning process followed by smelting to produce doré bars. The tailings stream from the CIP circuit will be treated in a cyanide destruction circuit using the SO2/Air process, before being pumped to a lined tailing storage facility. The Otjikoto plant and support infrastructure will be built to support a plant expansion from the initial processing capacity of 2.5 million mt/y to 3 million mt/y with minimal additional capital expenditure. An aggressive exploration drilling program continues on the high-grade Wolfshag zone discovered in late 2012 adjacent to the planned Otjikoto pit. NEWS-CALENDAR OF EVENTS MARCH 3–6, 2013: PDAC 2013, International Convention, Trade Show & Investors Exchange-Mining Investment Show, Toronto, Canada. Contact: Prospectors & Developers Association of Canada; Tel: 416-362-1969 ext. 1; Fax: 416-362-0101; Email: convention@pdac.ca; Web: www.pdac.ca. APRIL 15–21, 2013: bauma 2013, Munich, Germany. Contact: Messe München GmbH; Tel: 49 89 949-11348; Fax: 49 89 949-11349; Email: info@bauma.de; Web: www.bauma.de. APRIL 16–18, 2013: Minex Central Asia 2013, Astana, Kazakhstan. Contact: Arthur Poliakov; Tel: 44 (0) 207 520 9341; Email: admin@minexforum.com; Web: www.minexasia.com. APRIL 16–19, 2013: IMCET2013, 23rd International Mining Congress and Exhibition of Turkey, Kemer/Antalya-Turkey. Contact: UCTEA Chamber of Mining Engineers of Turkey; Email: imcet@maden.org.tr; Web: www.imcet.org.tr. MAY 5–8, 2013: CIM 2013 Convention, Toronto, Ontario, Canada. Contact: Canadian Institute of Mining, Metallurgy and Petroleum; Tel: 514-939-2710, ext. 1311; Email: mbell@cim.org; Web: http://web.cim.org/toronto2013. MAY 6–10, 2013: SYMPHOS 2013, the International Symposium on Innovation and Technology in the Phosphate Industry, Agadir, Morocco. Contact: OCP Group, Morocco; Tel: 212 5 23 34 51 22; Fax: 212 5 23 34 50 64; Email: info@symphos.com; Web: www.symphos.com. MAY 7–9, 2013: Arminera, Buenos Aires, Argentina. Contact: Viewpoint SA; Tel: (011)4814-3833/4816-5818; Email: info@viewpoint.com.ar; Web: www.arminera.com.ar. MAY 11–12, 2013: Geominetech 13th Annual Symposium on New Equipment New Technology Management and Safety, Bhubaneswar, India. Contact: JK Hota, editor and organizing secretary; Email: hotaeditor@sify.com or hotaeditor@gmail.com; Web: www.geominetech.webs.com. MAY 19–22, 2013: Haulage & Loading, Litchfield Park, Arizona, USA. Contact: Tanna Holzer; Tel: 303-283-0640; Email: tholzer@miningmedia.com; Web: www.mining-media.com. MAY 25–JUNE 1, 2013: ALTA 2013 Nickel-Cobalt-Copper, Uranium & Gold Conference and Exhibition, Perth, Western Australia. Contact: Alan Taylor, ALTA Metallurgical Services; Tel: 61 (0)418 126 284; Fax: 61 (0)3 9686 3008; Email: alantaylor@altamet.com.au; Web: www.altamet.com.au. JUNE 11–13, 2013: Longwall USA Exhibition & Conference, Pittsburgh, Pennsylvania, USA. Contact: Tanna Holzer; Tel: 303-283-0640; Email: tholzer@mining-media.com; Web: www.mining-media.com. 26 E&MJ; • FEBRUARY 2013 JUNE 17–21, 2013: Exponor, Antofagasta, Chile. Contact: Antofagasta Industrial Association; Tel: 55-454300; Web: www.exponor.cl. JULY 28–AUGUST 2, 2013: Mercury 2013, Edinburgh, Scotland. Contact: Marcus Pattison; Tel: 44 (0) 1727 858840; Fax: 44 (0) 1727 840310; Email: info@mercury2013.com; Web: www.mercury2013.com. AUGUST 11–15, 2013: 23rd World Mining Congress, Montreal, Canada. Contact: Canadian Institute of Mining, Metallurgy and Petroleum; Tel: 514-939-2710, ext. 1309; Email: wmc-secretariat@wmc-expo2013.org; Web: www.cim.org. AUGUST 20–23, 2013: AIMEX 2013 Asia-Pacific's International Mining Exhibition, Sydney, Australia. Contact: Reed Exhibitions Australia; Tel: 61 2 9211 7544; Email: aimex@reedexhibitions.com.au; Web: www.aimex.com.au. SEPTEMBER 4–6, 2013: China International Mining Expo 2013, Beijing, China. Contact: Beijing Hiven Exhibition Co. Ltd.; Tel: 86-10-6863 8450; Email: information_bj@163.com; Web: www.bjminexpo.com. SEPTEMBER 11–12, 2013: EuroMining 2013, Tampere, Finland. Contact: Tampere Trade Fairs/Mikael Wänskä; Tel: 358 207 701 230; Email: mikael.wanska@tampereenmessut.fi; Web: www.euromining.fi. SEPTEMBER 16–20, 2013: Extemin, Lima, Peru. Contact: El Instituto de Ingenieros de Minas del Perú; Tel: (51 -1) 349 4262, ext 352; Email: perumine@iimp.org; Web: www.iimp.org.pe. SEPTEMBER 16–20, 2013: XV International Congress for Mine Surveying, Aachen, Germany. Contact: RWTH Aachen, Institute for Mine Surveying; Tel: 49 241 80 95687; Fax: 49 241 80 92150; Web: www.ism-germany-2013.de. SEPTEMBER 23–26, 2013: Exposibram, Belo Horizonte, Brazil. Contact: Kallman Worldwide Inc.; Tel: 201-251-2600 ext. 127 or 56 2 843 3300 ext.3303; Web: www.kallman.com. OCTOBER 1–3, 2013: Minex Russia 2013, Moscow, Russia. Contact: Irina Yukhtina; Tel: 44 (0)207 520 9341; Fax: 44 (0)207 520 9342; Email: ira.y@minexforum.com; Web: www.minexrussia.com. OCTOBER 31–NOVEMBER 2, 2013: Mining 2013 Myanmar, Yangon, Myanmar. Contact: Shaun White, Allworld Exhibitions; Tel: 44 2078402130; Email: swhite@oesallworld.com; Web: www.miningmyanmar.com. NOVEMBER 27–29, 2013: 9th International Heavy Minerals Conference 2013,Vishakhapatnam, India. Contact: Mining Engineers Association of India; Tel: 91-9704928886; Fax: 91-08942283758; Email: contact@meai.org; Web: www.meai.org. www.e-mj.com

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