... the whole set of working procedures of filtering , extracting , separating, washing , classifying and put our qualified products directly. ... 2. It is mainly used for transfering the silt, ore pulp, coal liquid, sandstone containing big solid particles. 3 ... It is widely used in the dredge of silt, ore pulp, coal liquid, river, port and so on. ... any question. Low Price Sand Suction Dredging Machine Pump