Abstract: The 3-product heavy medium cyclone and coal slime heavy medium cyclone are now capable of washing down to a size below 0.25 mm and 0.1 mm respectively. Through corresponding adjustment of the aperture of the sieve bend, it is possible to maximize the recovery of coarse-grained slime, control upper size limit of flotation feed and reduce the flotation feed rate. Analysis of the application of the sieve bend with an aperture size of 0.2 mm at Pengzhuang Coal Preparation Plant shows that the sieve bend can operate with a partition size of 0.130 mm, an oversize yield of 37.00%, a sizing efficiency up to 84.9%, with the percentages of correctly placed oversize and undersize materials being as high as 92.5% and 92.4%, respectively, well demonstrating its remarkable working performance.