Separation of oil from oil-contaminated metal chips

TLDR: In this article, the authors proposed a method to reduce the time required for heating metal chips and removal of oil therefrom in such a sufficient amount as to minimize the residual oil therein by placing the oil-contaminated metal chips into a centrifugal separator and subjecting the same to a centrifugal action while blowing a hot gas there against.

Abstract: PURPOSE:To permit a reduction in time required for heating metal chips and removal of oil therefrom in such a sufficient amount as to minimize the residual oil therein by placing the oil-contaminated metal chips into a centrifugal separator and subjecting the same to a centrifugal action while blowing a hot gas thereagainst. CONSTITUTION:Oil-contaminated metal chips are placed into a centrifugal separator 3 and centrifuged for separation of the oil therefrom, while a hot gas of 50-150 deg.C is being blown thereagainst by the means consisting of a gas blowout pipe 4, an air blower 5, a gas heater 6, valves 7, 8 and 10, an air supply pipe 9 and an exhaust gas supply pipe 11. The oil removal in this way permits a reduction in the time required for heating the metal chips, allows little accumulation of the heat of oxidative reactions due to the heating and permits the separation of the oil from the metal chips in such a sufficient amount as to minimize the residual oil therein.