Determination of washability of Tekirdağ-Malkara-ibrice lignite

Ash measure of lignite increases because of including impurities and particles that organic and mineral origin correspondingly lignite's calories decreases. In addition, too much ash of lignite causes air pollution. The most common of coal cleaning technology is coal washing which diminish mineral particles contents. In this study; investigation of washability of Tekirdağ-Malkara-ibrice lignite was carried out. The properties of the coal used in the studies were as follows; the upper coal seam contained %2,76 moisture, %20,23 ash, %36,39 volatile matter, %3,52 sulphur and 4754 kcal/kg gross calorific value. Float and sink experiments have been made to determine the washability properties of the-50+20 mm,-20+4,75 mm and-4,75+0,5 mm size fractions. ZnCl2 was used in sink and float experiments. Density distribution, clean coal amount, washing convenience and washability degree have been used in utilizing the coal cleaning characteristics. According to washing results; optimum washing density and particle size of the coal sample are 1,7 g/cm3 heavy media and-4,75+0,5 mm particle size. While the particle size is reducing, washability is increasing.