FIELD: metallurgy; cleaning and preparation of liquids containing metallic and other contaminants and used for cooling and/or lubrication; removal of scale from process water of closed cooling cycle. SUBSTANCE: invention ensures high degree of cleaning at low content of oil on solid particles being removed. To this end, horizontal plates located in reservoir across flow of liquid shall be moved up and down and solid particles shall be removed from process water due to settling on plates under action of magnetic attractive forces generated on upper sides of plates. EFFECT: enhanced efficiency. 7 cl, 7 dwg
