Practice of the renovation of the coal slurry water treatment system at Luotuoshan Coal Preparation Plant

The problems facing the plant involve high ash and high moisture of flotation concentrate and low ash of tailings. To address these problems, the following technical transformation work is made following a thorough investigation and analysis: change of the single flotation system originally used to a double one; and application of the two-stage concentrate dewatering process with screen-bowl centrifuge + rapid-open filter press instead of the single-stage dewatering process using filter press only. Through technical innovation, there can be seen a respective drop of the ash and moisture of flotation concentrate by 0.5 percentage point and 1 percentage point with a rise of ash of tailings by 10 percentage points.