METHOD FOR PROCESSING OF INDUSTRIAL WATER-AND-OIL CONTAINING WASTES Russian patent published in 2003 - IPC

FIELD: metal working and metallurgy. SUBSTANCE: method involves using slime containing 17-20 wt% of water and oil; drying slime in straight-line rotating furnace equipped with rotoclone at temperature of 300-350 C for 20-30 min; obtaining dry magnetic metal concentrate and mixing it with liquid glass; briquetting said mixture; drying briquettes at temperature below 100 C. During processing of rolled out abrasive-free slime, magnetic concentrate is obtained immediately after drying in drum-type furnace, and during processing of polishing slime, magnetic concentrate is obtained by magnetic separation of dry slime after drying in drum-type furnace. Briquettes are dried at ambient temperature for 2.5-3.0 hours or at temperature of 75-100 C for 20-30 min. When drying in drum-type furnace, volatile compounds are separated and deposited in rotoclone with the use of solution of milk of lime, with following regeneration of said solution by means of floater. Method allows briquettes to be obtained, which are sufficiently strong to be transported for remelting. EFFECT: reduced material, power and labor consumption for manufacture of briquettes and ecological safety. 6 cl