Production of Ultra-Clean Coal by the Combined Method of Grinding and Collector Gasification Flotation

The preparation and application of ultra-clean coal is one the important aspects clean energy technology. However, mainly chemical methods, which are low in efficiency, high consumption expensive. It urgent to find an effective method prepare coal. In this paper, combined grinding collector gasification flotation was used obtain effects time on particle size composition, mineral dissociation, surface properties results samples were studied. test show that with increase time, pore diameter decreased gradually, while specific area volume gradually increased. When 20 min, D90 D[4,3] products 5.20 um 4.23 um, respectively. ash content −1.3 g/cm3 less than 1% when min. Compared traditional method, can a higher concentrate yield lower content. amount 2.0 kg/t, obtained by 4.1% 0.3% lower.