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Collahuasi Ujina Data

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Collahuasi Ujina News

  • Anglo-Glencore Collahuasi copper mine postpones expansion plan 2015-10-14
    Chile's second-biggest copper mine Collahuasi, owned by Anglo American and Glencore has postponed expansion plans, on top of its previously announced cuts, as it faces a six-year low in the price of the base metal. On September 29, Collahuasi had said it was planning to cut output by 30 000 t, alongside dozens of jobs, because of difficult market conditions.
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Collahuasi Ujina Information

  • Environmental 2015-10-29
    As the environment at Collahuasi is harsh and fragile, ecological issues have a top priority. Collahuasi is a zero-discharge operation, with much of its water being recycled. An extensive environmental monitoring system is in place along with research projects in high altitude operations. Collahuasi achieved its ISO 14001 environmental management certification in 2000.
  • Geology 2015-10-29
    Collahuasi is based on a typical low-grade copper porphyry, comprising three ore zones: the major Ujina and Rosario deposits consisting of secondary, enriched sulphides and oxides and the Huinquintipa oxide deposit. The major ore minerals are chalcocite, chalcopyrite and bornite. Oxide mineralisation occurs mainly as chrysocolla with minor brochantite, native copper, and copper-iron-manganese oxides and hydroxides.
  • Processing 2015-10-29
    The processing area consists of both oxide and sulphide plants. Oxide and mixed ores are treated by heap-leaching, solvent-extraction and electro-winning (SX-EW). Sulphide ore is crushed, ground and treated by flotation. Run-of-mine sulphide ore enters the primary gyratory crusher prior to transport to two parallel grinding circuits, each consisting of a SAG mill and a ball mill. Secondary closed circuit grinding includes cyclone classifiers, from which the overflow feeds the flotation circuit. Flotation concentrate is thickened to 50% solids for slurry transport in a 200km-long pipeline to Punta Patache, 65km south of Iquique, where it is thickened and filtered before shipment worldwide. An expansion to the concentrator was completed during 2004.
  • Mining 2015-10-29
    The Ujina and Huinquintipa zones were mined first, with a transition to the Rosario orebody completed during 2004. Stripping at Rosario began in 2002. The stripping ratio at Ujina averages 4.4:1 (waste: ore) with a 15m bench height. Huinquintipa is somewhat smaller. The design mining rate of 360,000t/d of rock was achieved in Year 1, involving the blasting of 750,000t of material every two days.
  • General 2015-05-10
    Collahuasi copper mine 180km south-east of the port of Iquique in northern Chile ranks as the third largest copper mine in the world. Proven and probable copper reserves of the open-pit mine as of December 2012 stood at 25.895Mt. The mine produced 282,096t of copper in 2012, accounting for 5.1% of Chile's total copper output. Collahuasi copper mine is owned and operated by Compania Minera Dona Ines de Collahuasi, a joint venture between Anglo American (44%), Xstrata (44%) and a consortium of Japanese companies led by Mitsui (12%). The mine produced 245,288t of copper concentrates and 36,808t of copper cathodes in 2012. It has been in operation since 1999. It exploits three mineral deposits, namely Rosario, Ujina and Huinquintipa, in the Pica municipal district of Tarapaca Region. The mine life is 70 years.

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    Chile's second-biggest copper mine Collahuasi, owned by Anglo American and Glencore has postponed expansion plans, on top of its previously announced cuts, as it faces a six-year low in the price of the base metal. On September 29, Collahuasi had said it was planning to cut output by 30 000 t, alongside dozens of jobs, because of difficult market conditions.
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