RECOVERY DEVICE FOR ROLLING MILL LUBRICANT OUT OF ROLLING MILL LUBRICANT FUME DURING METAL ROLLING

摘要

PURPOSE:To recover the rolling mill lubricant from rolling mill lubricant fumes during metal rolling without causing any change of properties of fats and oils by condensing the rolling mill lubricant fumes during rolling and continuously capturing the same in a fluid state. CONSTITUTION:The rolling mill lubricant fumes evaporated during cold rolling of steel plates are introduced through a hood 5 and a fume guide pipe 6 by a suction blower 16 into a fume condensing tank 7, where they are cooled and condensed to liquid. The condensate flows down into an aggregating groove 9, after which it is discharged and stored into a storage pit 11 by a delivery device 10. Further, it is lifted by a pump 13 into a centrifugal separator 14, by which fat and oil components are separated and recovered. The separated and recovered fat and oil components are reflowed into a storage tank 4 and are reutilized as a rolling mill lubricant. The uncondensed gas in the tank 7 is drawn out from the tank 7 by the blower 16 and is discharged through an discharging and releasing tower 17.