Research on flotation parameters optimization of high ash content coal slime based on flotation column

Elaborated produce reason of high ash content slime and its current research situation of flotation,described the features and the adaptability of cyclonic micro- bubble Flotation Column for separating high ash content slime. The separation of Xingtai coal slime based on laboratory- scale flotation column system was conducted,and Design- Expert software was utilized to analyze and optimize the experiment result. The following are the best flotation conditions: the collector dosage is 2400 g/t,the feed concentration is 100 g/L and dosage ratio is 8∶ 1,now the obtained clean coal yield is 57. 13%,ash content is 9. 35%,the tailing ash content is 48. 63% and the flotation perfection index is 49. 99%.