Evaluation of Heavy Medium Concentration from Heavy Liquid Tests for Megalopoli Low Grade

E.Th. Stamboliadis* and I.G. Nikolaou

Department of Mineral Resources Engineering, Laboratory of Mineral Processing, Technical University of Crete, 73 100 Chania, Greece

Received 21 November 2001; accepted 30 January 2002


Lignite from Marathousa open pit in Megalopolis, Greece is characterised by itís 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.

Keywords: Lignite; Heavy medium separation

* Corresponding author
   E-mail : elistach@mred.tuc.gr