公开(公告)号：US5129630A

公开(公告)日：1992-07-14

申请号：US710678

申请日：1991-06-05

申请人： Tatsuro Ariyama ,  Jiro Mase ,  Yoshiyuki Kitano ,  Sakae Arakawa ,  Haruhito Tsuboi ,  Shinichi Isozaki ,  Hitoshi Kawata ,  Genji Kanatani

发明人： Tatsuro Ariyama ,  Jiro Mase ,  Yoshiyuki Kitano ,  Sakae Arakawa ,  Haruhito Tsuboi ,  Shinichi Isozaki ,  Hitoshi Kawata ,  Genji Kanatani

IPC分类号： C21B13/00 ,  C21B13/14

CPC分类号： C21B13/0033 ,  B01J8/1827 ,  B01J8/1836 ,  B01J8/44 ,  C21B13/14 ,  B01J2208/00194 ,  B01J2208/00212 ,  B01J2208/00371 ,  B01J2208/00495

摘要： A prereduction furnace of a smelting reduction facility comprises a fluidizing prereduction chamber in the upper part of the prereduction furnace wherein iron ores are fed and prereduced, a gas blowing chamber installed in the lower part of the prereduction furnace wherein a reducing gas is fed, a distributor for separating the fluidizing prereduction chamber from the gas blowing chamber, and a discharge pipe for discharging the prereduced ore from the fluidizing prereduction chamber. The distributor includes a body of refractory material, a metal plate installed on the bottom of the body, nozzles passing through the body and the metal plate, metallic pipes inserted in the nozzles, and cooling pipes connected to the metal plate. A metallic box may be installed below the metal plate for providing passages for gas flow. A bottom plate may be installed spacedly below the metal plate, with nozzles passing therethrough. The distributor may comprise a rigid thick plate and a refractory layer thereon.