Patent ID: 7618476
Filing Date: 2009-11-17
Classification: C21B,F27D,Y02P

Abstract:
1. A method for cooling a reduced-iron agglomerate in a reduced-iron agglomerate production equipment wherein an iron oxide agglomerate is reduced in a reducing furnace and discharged as a reduced-iron agglomerate characterized by: installing a conveyor to convey said reduced-iron agglomerate at the outlet of said reduced-iron agglomerate production equipment; installing a plurality of spray nozzles above said conveyor at intervals (P) satisfying the expression 1.2×B≦P≦10×B, where B is the spread width of spray water in the conveying direction, so that spread widths of spray water in the conveying direction of said reduced-iron agglomerate do not overlap with each other; setting the spread width of spray water in the conveying direction B and the spread width thereof in the conveyor width direction W satisfying the expression: W≧2×B, where W is the spread width of spray water in the conveyor width direction and B is the spread width of spray water in the conveying direction; cooling said reduced iron agglomerate on said conveyor intermittently by ejecting cooling water intermittently through said spray nozzles so that an ejecting time T where T to lower a surface temperature by repeated cycles of rising and lowering of the surface temperature of said reduced-iron agglomerate; providing side portions arranged on said conveyor, said side portions accumulating said cooling water and forming a water layer 1 mm to less than 10 mm in depth on said conveyor; said cooling of said reduced-iron agglomerate being a rapid cooling to a temperature range of 100° C. to 300° C. thereby suppressing reoxidation by atmospheric air; regulating water content of said reduced-iron agglomerate after cooling to 6% or less.