DEVICE AND METHOD FOR TREATING OIL-ADHERED PARTICLES

摘要

The present invention aims to economically recycle fine particles having oil deposited thereon by performing an oil removal processing, and provides a method and apparatus for removing oil from fine scales having lubricating oil or the like deposited thereon in an iron making process or metal processing or from metal powder having oil produced in metal processing deposited thereon, comprising the steps of mixing the oil-contaminated fine particles or oil-contaminated metal powder particles with water to form slurry, feeding the slurry into a centrifugal separation apparatus, and processing the slurry with a centrifugal force not less than 300 times the gravitational acceleration so as to separate oil and water from the fine particles or metal powder particles. In this separation, the volume ratio of water relative to the volume of particles of the slurry is properly adjusted, and the relation between the centrifugal force and the stay time of particles is properly adjusted.