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Evaluation of Heavy Medium Concentration
from Heavy Liquid Tests for Megalopoli Low Grade Lignite
from Marathousa open pit in Megalopolis, Greece is characterised by it’s low calorific
value 199,4kJ/kg,,high ash content 25.9%w/w and high moisture content 47.8% w/w. Heavy
liquid separation tests of the size fraction 2-32mm have produced a lignite concentrate
more than 50% by weight with ash content 13.3% w/w as it is and calorific value
306,7kJ/kg, a quality that fulfils the specifications put by the Public Power Corporation
of Greece (PPC). The expected product quality from industrial application using Heavy
Media Separation is calculated by mathematical modelling. The predicted separation
efficiency using heavy media machines lies between 80% and 90% of the one obtained by
heavy liquid tests. |
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