A centrifuge is a machine that uses centrifugal force to separate the components of liquid and solid particles or liquid-liquid mixtures. Centrifuges are mainly used to separate solid particles in suspension from liquids, or separate two liquids of different densities and immiscible in the emulsion (e.g. separating cream from milk); They can also be used to exclude liquids from wet solids, such as shaking dry wet clothes with a washing machine; Special ultra-speed tubular separators can also separate gas mixtures of different densities; Taking advantage of the different sedimentation speeds of solid particles of different densities or particle sizes in the liquid, some sedimentation centrifuges can also classify solid particles according to density or particle size.

