近年来,日本钢铁界注重探讨生产低硅生铁的技术,取得了新进展。 一、风口喷吹烧结矿粉脱硅 新日铁庀畑3号高炉(炉容1691m~3),从风口吹入烧结矿粉,进行脱硅试验。其方法是:从出铁口附近的4个风口(见图1),吹入粒度3mm的烧结矿粉,喷吹量4—6kg/min,喷吹时间25—45min/次,接着停吹30min,重复30次。 In recent years, the Japanese steel industry has paid attention to the technology of producing low-silicon pig iron and has made new progress. First, the outlet blowing sinter ore desiliconization Nippon Steel 庀 畑 No. 3 blast furnace (furnace capacity 1691m ~ 3), blown from the tuyere sintered powder, desiliconization test. The method is as follows: blasting sinter ore powder with a particle size of 3mm from the four tuyeres (see FIG. 1) near the taphole, blowing the amount of 4-6kg / min, blowing time 25-45min / time, then stopping blowing 30min , Repeated 30 times.