Improving Efficiency of Flotation for Tavantolgoi Coal after Interplay Combination Ultrasonic and Electrolysis

Abstract

The Tavantolgoi coal deposit used in our study is one of the largest deposits and belongs to coking coal of the Permian age. Technical properties of each layer of coal in Ukhaa Khudag of the Tavantolgoi deposit were determined and compared. This study was carried out by selecting coal from layer 4C, which has the lowest calorific value of economically important layers. Sieve analysis of the coal samples was carried out to select the ultra-fine or ˂0.25 mm particle size fraction, and three different methods of flotation enrichment were conducted and compared. In this, conventional flotation, flotation after interplay of ultrasonic vibration and flotation after interplay combined with ultrasonic with electrolysis were carried out, respectively. As a result of the experiment, the best result was the coal concentrate with 6078k Cal/kg calorific value and 25.65% ash content of flotation after interplay of ultrasonic vibration combined with electrolysis. Therefore, we have determined the suitable experimental conditions for the further application of ultrasonic vibration in combination with electrolysis. We determined that the ultrasonic vibration time of 20 min, the amount of ethanol of 30 ml, and the electrolysis power of 1.5 A are suitable condition because the ash content of the floating concentration is the lowest, 24.1%, and the caloric content was the highest (6264 kcal/kg).