Investigation of washability of akcelik lignite, Tekirdag/Turkey

34th Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2017 -- 5 September 2017 through 8 September 2017 -- -- 134211
The objective of this study was to examine the washability properties of lignite samples acquired from the open-pit mine in Tekirdag, Turkey which belong to the Akçelik company. For this purpose, sieve analysis was first carried out thus determining that the particle size is below 75 mm. Afterwards, complete chemical analysis (ash, calorific value, humidity, sulphur etc.) was carried out. It was concluded according to these analyses that the sample was of low quality. This affects the marketing conditions of coal and results in environmental problems. Hence, the coal has to be cleaned in order to improve its quality. Float-sink experiments were carried out for -75+18, -18+10 and -10+0.5 mm dimension groups in order to put forth the washability of the samples in experimental studies. The washability properties of the samples were determined from the Henry-Reinhard Float-Sink and Mayer (M) curves obtained as a result of these studies. Accordingly, it was determined that in case the sample is floated in an environment with a density of 1.6 g/cm3, its floatability is easy in +75 and -75+18 mm size groups according to ±0.1 density separation values, however it was also determined that the floatability became more difficult in the -18+0.5 mm size group. It was observed that ash values decreased as with decreasing particle size as a result of coal washing process which caused an increase in the calorific values. © 2017 34th Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2017. All rights reserved.