据日本《特许公报》1984—480(19171)报道:最近日本开发了一种通过载流气体直接将还原铁粉送入炉内的方法。其特点是,流化床还原炉生成的还原铁粉不需再加工,直接用载流气体通过吹入机、管道、浸入式喷枪送入护内钢液中。而且,速度和加入量 According to Japanese “Patent Gazette” 1984-480 (19171) reported: Japan recently developed a carrier gas through the direct reduction of iron powder into the furnace method. The utility model is characterized in that the reduced iron powder generated by the fluidized bed reduction furnace does not need to be processed, and is directly fed into the liquid steel in the sheath by the blowing machine, the pipeline and the immersion type spray gun. And, speed and added amount