HYDRAULIC CLASSIFIER Russian patent published in 1998 - IPC

FIELD: mineral concentration, in particular, apparatuses for hydraulic classification and fractionation of mineral raw materials in ascending flow of liquid; may be used in gravity mineral concentration and also for pulp thickening, clarification of industrial waters and treatment of industrial sewage waters. SUBSTANCE: cylinder is provided from external side, over its entire height with balloon for compressed air made in the form of shell from rubber with flexible bands in middle part and nipple for compressed air supply in upper end. Balloon has on its external side removable lining made in the form of shell from wear-resistant flexible rubber. Pulp inlet pipe has on its external upper part a set of removable lining in the form of shell and made, for example, from polyurethane with different values of outer diameter and inner diameter exceeding outer diameter of inlet pipe and having circular shoulder on top end. Inner diameter of circular shoulder is equal to in let pipe inner diameter. EFFECT: higher efficiency. 2 cl, 2 dwg