The Ortner Sand Classifier | Aggregates Equipment, Inc.The Ortner Sand Classifier is a revolutionary concept for dewatering, removing fines, classifying and rinsing sand and other materials up to three inches. . The high frequency quickly separates the various sizes of material, with fines and water rising to the top and discharging over the pan's edge. The coarser material sinks.sand rising machine,sand screw - Washing SystemsSAND SCREW. Around the globe, the Mining and. Minerals industry is met with challenges and uncertainty. There is a growing need to meet today's stringent specifications for cleaner and higher quality aggregates, more effective water recycling processes and the drive to provide highly productive equipment. It is therefore.