environmental aspects of mineral processing tailings operation
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Environmental aspects of mineral processing tailings operation. Group 10 Lecturer: Imre Gombkötő University of Miskolc - Hungary Students:Friedrich Jagnow Jonas Finke Stefan Lohberger. International Project Week Fh Nordhausen 30.4.2010. Project. - PowerPoint PPT PresentationTRANSCRIPT
Group 10
Lecturer: Imre Gombkötő University of Miskolc - Hungary
Students: Friedrich JagnowJonas FinkeStefan Lohberger
International Project Week Fh Nordhausen 30.4.2010
Imaginary mining facility: Case study A new explored ore field south of Goslar
is to be exploited. Think about the handling and storage of
tailings and its risks. 25.000.000 metric tonnes of ore 14% Zn, 6% Pb, 5% Cu, 1 g/t Au, 140 g/t
Ag and 20% barite 500 to 900 meters deepth Nearby existing mining
facilities pic. By Harz Minerals GmbH
Tailings are a waste product of the ore processing.
Suspension of water and fine rock particles
Often contain dangerous chemicals and components like heavy metals, cyanide and acids
Risks depend on mineralogy, mining technology, mineral processing and themethod of deposition
International Project Week Fh Nordhausen 30.4.2010
barite content is useful ARD: acid generating potential
because of sulfidic mineral components especially pyrite
Heavy metal content is able to mobilise
International Project Week Fh Nordhausen 30.4.2010
Underground mining
Open pit
International Project Week Fh Nordhausen 30.4.2010
International Project Week Fh Nordhausen 30.4.2010
International Project Week Fh Nordhausen 30.4.2010
Partical size below 200 mikrometers Flocculant (polymers) Flotation agents such as:
organic collectors (xanthate), pH-regulators (sodium
hydroxide, sulfidic acid) depressors (sodium cyanide) frothers (alcohols)
International Project Week Fh Nordhausen 30.4.2010
International Project Week Fh Nordhausen 30.4.2010
Approximately 8 Mio m³ of solid waste
Together with app 800,000 m³ water
International Project Week Fh Nordhausen 30.4.2010
Contamination of groundwater through heavy metals, acidic water
Toxic free Sodium Cyanide Damage to flora & fauna Risk of unexpected human activity
International Project Week Fh Nordhausen 30.4.2010
Contamination of groundwater and surface water through heavy metals and acidic water
Toxic free Sodium Cyanide
The possibility of insuficiant capacity of the cavities
International Project Week Fh Nordhausen 30.4.2010
Similar risks like open pit method Additionally dusting
dam failure due to erosion, overtopping or liquefaction
of the dam caused by vibration (blasting)
International Project Week Fh Nordhausen 30.4.2010
Finish
Group 10Lecturer: Imre Gombkötő
University of Miskolc
Students: Friedrich JagnowJonas FinkeStefan Lohberger
International Project Week Fh Nordhausen 30.4.2010
Google Earth imageryopen pit mining: http://places.mongabay.com/australia/open_pit_mine.jpgunderground mining: http://upload.wikimedia.org/wikipedia/commons/2/2d/Bergwerk-monopol-
bergkamen.jpgjaw: http://www.limingjawcrusher.com/pic/jaw.jpg
International Project Week Fh Nordhausen 30.4.2010