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Χαλκός και χρυσός στο Κιλκίς χαρμόσυνο νέο ! …………………………………… Ή μήπως όχι; PowerPoint PPT Presentation


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Χαλκός και χρυσός στο Κιλκίς χαρμόσυνο νέο ! …………………………………… Ή μήπως όχι;. Γνωστό από παλιά στους ντόπιους, και όχι μόνο, πως στο Κιλκίς υπάρχει χαλκός και χρυσός . Γνωστό και στους αρμόδιους κρατικούς φορείς. Γνωστό και στις ξένες μεταλλευτικές εταιρίες.

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Χαλκός και χρυσός στο Κιλκίς χαρμόσυνο νέο ! …………………………………… Ή μήπως όχι;

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Outotec SolutionsOutotec offers expertise and innovative solutions from initial feasibility studies to full-scale plants and life-long services

Flotation

  • Flotation is a well-known extraction/beneficiation process. Flotation of sulphide minerals usingsynthetic collector chemicals is an invention with a history of more than a hundred years. Numerous plants worldwide utilize this process with very well-controlled and documented environmental impact.

  • The flotation processneeds water. If necessary, seawater is also suitable. It also needs collector reagents in the dosing of some grams per ton of feed, plus regular ambient air blown into the mixture of finely ground minerals and water. To assist the process, other reagents, such as pH modifiers (typically lime or soda ash) and frothers (organic compounds stabilizing the froth) are used. In the case of some minerals, the flotation process needs to use harmful chemicals like cyanide, but fortunately in very small dosages. These substances may also find their way into the plant tailings, which are constantly monitored by authorities.


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  • Perhaps the biggest environmental challenge presently felt with the flotation process is the availability of water.Water resources are often scarce and tightly controlled by authorities, and in certain areas, projectsneed to build long pipelines to bring water to site. Seawater pipelines and de-salination plants can also be used.

  • Another impact of the flotation processis tailing areas. These may occupy vast areas, and are composed of slowly settling material and residual amounts of process reagents. Tailing areas are under constant, tight surveillance.

  • Because of the water issues mentioned above, the clear top water of a tailing area is usually recycled back to the plant, and used as process feed water. The amount of recycled water versus raw (fresh) water is naturally as high as possible, often in the range of 50 90 % recycling. This recycling can be vastly improved be using tailings thickening. With recycled water, the process may also experience pulp chemistry-related issues, typically leading to difficult controllability in the process.


Outotec to deliver concentrator technology for hellas gold in greece

Outotec to Deliver Concentrator Technology for Hellas Gold in Greece

Monday, November 05, 2007 by Outotec

  • Outotec has been awarded a contract by Hellas Gold for the supply of a large technology package for Hellas Gold's copper-gold concentrator plant in Skouries in Northern Greece. The total contract value exceeds 30 million.

  • Hellas Gold owns three major gold and base metal deposits in Northern Greece which are the polymetallic deposit at Stratoni, the Olympias deposit containing gold, zinc, lead and silver, and the Skouries copper-gold-porphyry deposit.

  • Outotec's delivery for the Skouries project covers proprietary technologies for grinding,flotation, thickening and automation including engineering and commissioning services. Most of the deliveries will be completed during 2009.


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