Washing and screening process Manganese ore: washing using water washing or scrubbing the ore with additional mechanical separation of shale. Commonly used equipment includes washing sieves, cylinder washing machines and tank washing machines. The washing operation is often accompanied by sieving, such as direct flushing on the vibrating screen or sifting the ore (net ore) obtained by the washing machine to the vibrating screen. Screening can be used as an independent operation to separate products of different sizes and grades for different purposes. WNRF Flange manufacturer from China, welding neck flanges exporter, weld neck flanges factory, wnrf flanges means weld neck flanges raised face, flanges norms DIN EN1092-1 BS4504 GOST12821-80 and ANSI B16.5, WNRF flanges pressure PN6 PN10 PN16 PN25 Class 150lbs 300lbs 600lbs 900lbs 1500lbs 2500lbs, hyupshin flanges co., ltd is WNRF flanges manufacturer WNRF Flange Weld Neck Flange manufacturer, wnrf flanges, Wn flanges raised face, en1092-1 type 11 flanges, din 2631 2632 2633 2634 2635 wnrf flanges Jinan Hyupshin Flanges Co., Ltd , https://www.iflange.com