公开(公告)号：US20030019548A1

公开(公告)日：2003-01-30

申请号：US10179988

申请日：2002-06-26

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： Yoshiyuki Miyagawa ,  Katsuhiro Tanaka

IPC分类号： C21D001/00 ,  C21D006/00 ,  C21B003/00

CPC分类号： C21B13/0046 ,  C21B13/0086 ,  C22B1/26

摘要： A method for cooling hot reduced iron briquettes at low cost without degrading the strength is provided. The method includes a primary cooling step of cooling the hot reduced iron briquettes by steam at a cooling rate of 4.0null C./s or less, a secondary cooling step of cooling the reduced iron briquettes by steam and sprayed water at a cooling rate of 4.0null C./s or less, and a final cooling step of cooling the reduced iron briquettes by sprayed water at a cooling rate of 3.5null C./s or more to a temperature in a final product temperature range. The steam generated by evaporation of sprayed water during the final cooling step is used in the primary and/or secondary cooling step.

摘要翻译： 提供了一种以低成本冷却热还原铁团块而不降低强度的方法。 该方法包括以4.0℃/ s以下的冷却速度的蒸汽冷却热还原铁团块的主冷却步骤，以蒸汽和喷射水以冷却速度冷却还原铁团块的二次冷却步骤 4.0℃/ s以下，最后冷却工序，以3.5℃/ s以上的冷却速度将喷射水冷却至最终产品温度范围内的还原铁团块。 在最终冷却步骤中通过蒸发蒸发产生的蒸汽用于初级和/或二级冷却步骤。