Engineering & Mining Journal

JAN 2019

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 - CONTINUED 16 E&MJ • JANUARY 2019 www.e-mj.com NEWS - CALENDAR OF EVENTS JANUARY 27-30, 2019: 45 th Annual Conference on Explosives and Blast- ing Techniques, Nashville, Tennessee, USA. Contact: Web: www.isee.org. FEBRUARY 24-27, 2019: SME Annual Conference & Expo, Denver, Colorado, USA. Contact: Web: www.smeannualconference.com. MARCH 3-6, 2019: Prospectors & Developers Association of Cana- da's annual conference, Metro Convention Center, Toronto, Canada. Contact: Web: www.pdac.ca. MARCH 10-13, 2019: Haulage & Loading, Hilton El Conquistador Resort, Tucson, Arizona, USA. Contact: Web: www.haulageandloading.com. APRIL 23-25, 2019: MiningWorld Russia, Crocus Expo, Moscow, Russia. Contact: Web: www.miningworld.ru. APRIL 8-14, 2019: bauma, Messe Muenchen, Munich, Germany. Contact: Web: www.bauma.de. APRIL 28-MAY 1, 2019: Canadian Institute of Mining (CIM 2019), Montreal, Canada. Contact: Web: www.cim.org. MAY 7-9, 2019: Arminera, Centro Costa Salguero, Buenos Aires, Argentina. Contact: Web: www.arminera.com.ar. MAY 18-25, 2019: ALTA 2019, 24 th Annual Metallurgical Conference, Perth, Australia. Contact: Web: www.altamet.com.au. MAY 20-22, 2019: Longwall USA, Pittsburgh, Pennsylvania, USA. Contact: Web: www.longwallusa.com. MAY 27-30, 2019: Exponor Chile 2018, Antofagasta, Chile. Contact: Web: www.exponor.cl. AUGUST 27-29, 2019: AIMEX, Sydney Showgrounds, Sydney, Australia. Contact: Web: www.aimex.au. SEPTEMBER 16-20, 2019: Perumin, Centro de Convenciones Cerro Juli, Arequipa, Peru. Contact: Web: perumin.com/perumin34/. SEPTEMBER 9-12, 2019: Exposibram, the Brazilian Mining Expo & Congress, Expominas, Belo Horizonte, Brazil. Contact: Web: www.portaldamineracao.com.br/exposibram. OCTOBER 30-NOVEMBER 2, 2019: China Coal & Mining Expo, New China International Exhibition Center, Beijing, China. Contact: Web: www.chinaminingcoal.com. of production are estimated at $749/oz. Total initial capital costs to develop the project are estimated at $361 million, and the after-tax payback period is esti- mated at 4.1 years. The Montagne d'Or deposit hosts NI 43- 101 proven and probable reserves of 2.75 million oz of gold in 54.11 million mt grad- ing 1.58 g/mt. The reserves are a subset of measured and indicated resources totaling 3.85 million oz in 85.1 million mt grading 1.41 g/mt gold at a cut-off grade of 0.4 g/ mt. The deposit has considerable potential for expansion on strike and at depth. The Montagne d'Or plant is designed to treat the range of ore types and blends that will be mined over the life of the project. Unit processes will include size reduction; gravity concentration; pre- leach thickening; a leach/carbon-in-leach circuit; an elution circuit; electrowinning; and gold smelting to produce doré. Goldcorp Produces First Gold at the Pyrite Leach Project Goldcorp has achieved first gold at Peñasquito's Pyrite Leach Project (PLP). Commissioning commenced in the third quarter of 2018 and the PLP is now processing 100% of the existing plant tailings. The PLP plant is operating 24 hours a day and is continuing the planned ramp-up process, the company said. "PLP was a major investment decision for Goldcorp and one of the first that went through our Goldcorp Investment Frame- work," said David Garofalo, president and CEO. "We are very pleased with the results in completing the project both ahead of budget and schedule. We are already mov- ing forward with a post investment review where we can take our lessons learned to continue to improve our framework and overall capital allocation strategy." PLP has been delivered with more than 9.5 million site-hours, zero lost time incidents and an industry-leading all inju- ry frequency rate of 0.09. According to Goldcorp, commission- ing was achieved two quarters ahead of schedule and commercial production is now expected by the end of the year, two quarters ahead of schedule. The project was also completed 9% under budget. The Pyrite Leach Project is expected to recover approximately 35% of the gold and 42% of the silver currently reporting to the tailings and is expected to add pro- duction of more than 1 million ounces (oz) of gold and 45 million oz of silver over the current life of the mine. The PLP plant processes the existing plant tails, feeding a sequential flotation and leach circuit with precious metals recovered through a Merrill Crowe process, produc- ing doré as the final product. Tails from the new plant will report to the existing tailings storage facility. Chinchillas Mine Achieves Commercial Production SSR Mining Inc. has declared commer- cial production at the Chinchillas mine as of December 1. "Declaring commercial production at Chinchillas marks another major mile- stone as we continue to deliver growth and value for shareholders," Paul Ben- son, president and CEO said. "Our team's execution capabilities brought the mine in on schedule, in line with our expectations. Together with the commu- nities and government, we are building on our success at Puna Operations over the last few years." Activities required to support sustain- able ore delivery from the Chinchillas mine to the Pirquitas plant have been completed, including pre-stripping of the pit, completion of road bypasses, refurbishment and mobilization of the haul truck fleet, and construction of the crushed ore stockpile dome at the Pirqui- tas site. Ore delivery to the Pirquitas plant ramped up through November and demonstrated targeted haulage rates. The Pirquitas plant processed Chinchil- las ore at a rate of approximately 3,000 metric tons per day (mt/d) during test processing. The company expected this rate to progressively increase to its tar- geted plant throughput rate of 4,000 mt/d as the plant transitions to Chinchil- las ore in December. (Regional News-Latin America - from p. 10)

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