Centrifuge is mainly used for the suspension particles and liquid separate; Or will emulsion of two kinds of density is different, and each phase soluble liquid separate (such as isolated from milk cream); It is also used to eliminate the wet solid liquid, such as washing machines left dry wet clothes; Special speed tubular separator can separate different density of gas mixture; Use different density and particle size of solid particles in liquid settling velocity in different characteristics, some settling centrifuge but also on the solid particles according to density or particle size classification.