The usage of flocculants for the processes of thickening and dewatering of thin coal sludges

Abstract

The Usage of flocculants in Processes of Coal Sludges Thickening and Dewatering is an important factor for a stable CPP performance. A presence of fine clay particles greatly complicates Solid and Liquid Phases Separation Processes. An Effective Work of flocculants is complicated by harsh climate of the region (West Siberia). A large number of different Dewatering methods require a special approach to an Application of Flocculants in each process. Existence of flocculants with various molecular mass and ionic activity allows distinguishing different polymer groups that performance effectively on any type of equipment. The Authors have been researching a Performance of flocculants Magnaflock produced by the “BASF” Company. Conducted researches showed us that flocculants helps to intensify Dewatering Processes not only in Radial Thickeners and Belt Filter-Presses, but also in “Decanter” Centrifuges, Hyperbar-Filters and Chamber Filter-Presses. Groups of flocculants have been selected which works effectively in different Processes of coal sludges Dewatering. A possibility to apply a Selective Flocculation of coal-clay particles in Classifying Hydrocyclone has been shown. Laboratory and industrial tests of a Usage of the rheology Reomax ETD modifiers in a Process of Water Clarification of Flotation Wastes in Hydraulic Mine Dumps have been conducted.