Improving the technology of extracting coal concentrate from fly ash from thermal power plants

Purpose. Study on the possibility of extracting coal underfire particles from ash thermal power station by flotation. Intensification enrichment process particles, development a mathematical model for forecasting indicators function. Methodology. The method fractional flotation was used to study kinetics extraction valuable component. technique planned experiment applied, including central composite rotatable plan second order four factors affecting content concentrate. Findings. According analysis, concentration limit determined. During fly ash, best results were obtained EFM ejector type machine, yield foam product 18.6 % with an 25.1 %, compared MFU mechanical where 36.5 average 21.1 %. optimal consumption reagents at level no more than 3,500 g/t collector and foaming agent up 250 determined experimentally, required time Calculations performed determine regression coefficients degree influence process. A TPP removal determined, which characterizes main factors. graphs significance three-dimensional surface calculated response function drawn up. Originality. such as pulp pressure in feed pipeline, consumption, beneficiation machine Practical value. complex makes it possible predict final function, namely secondary will make improve parameters technological processes ashes.