The Metso Cyclonic Ultrafine Classifier is a hybrid air cyclone that combines cyclone and classifier designs to separate very fine particles. This unit includes our unique inlet scroll which is designed with a smooth flow elbow to eliminate currents perpendicular to the main direction of gas flow that is present in standard conventional rectangular entrance cyclones. This creates a smooth and uniform flow in this unit which thus leads to higher efficiencies then conventional cyclones. In conventional air cyclones, the aim is to remove as much of the particulate from the airstream as possible. However the Cyclonic Ultrafine Classifier is designed to allow the finest particles to be removed in the ascending vortex. This separation is achieved by introducing a reverse airflow into the specially designed disengaging hopper that weakens the descending vortex and creates a stronger entraining force in the ascending vortex that draws the required particles away to the fines collector. Control of the separation point is achieved by varying the percentage of reverse airflow relative to the total air. The Cyclonic Ultrafine Classifier is designed to achieve separations in the region of 50μm (#270) to 10μm (#1250) with a top feedsize of 5mm (#4). Tonnages for single units are in the region of 0.1tph to 30tph. Above this level, ‘cluster’ systems are available where multiple units are operated in parallel. The Cyclonic Ultrafine Classifiers are very low maintenance even on highly abrasive feeds. The unit contains no moving parts and adjustments can be made on-line. The range of manufacturing materials available includes abrasion resistant, stainless and mild steels and aluminum. For abrasive applications, ceramic lining is available which give exceptional sliding wear resistance. For more information, contact your local Metso representative. 2715 Pleasant Valley Road York, PA , USA 17402 Tel: +717 843 8671 Fax: +717 845 5154 www.metso.com Specifications in this document are subject to change without notice. Product names in this publication are all trademarks of Metso Corporation. Single Stage Classification Grinding with Two Stage Classification Adjustable ultrafine classifications from specially designed high efficiency cyclones with controllable reverse air flow systems Cyclonic Ultrafine Classifier Cyclonic Ultrafine Classifier

Descending vortex with feed particulate Inlet scroll Smooth flow elbow Ascending vortex with fine particulate Ascending reverse airflow Reverse airflow inlets Disengaging hopper Coarse particle to discharge airlock For more information, contact your local Metso representative. 2715 Pleasant Valley Road York, PA , USA 17402 Tel: +717 843 8671 Fax: +717 845 5154 www.metso.com Specifications in this document are subject to change without notice. Product names in this publication are all trademarks of Metso Corporation. Cyclonic Ultrafine Classifier Exhaust airflow with fine particulate