我厂铸造车间使用的3吨/时冲天炉,在用冲入法处理球铁铁水时,会排放出大量带有刺激性的毒烟和粉尘,并有强烈的镁光辐射,劳动条件很差。1981年10月,我们自己设计了一套炉前“封闭罩式”除烟设备,操作简便,效果较好。我们在炉前分别安装了固定罩和移动罩。固定罩设在放置铁水浇包的地 The 3 ton / hour cupola used in the foundry’s casting shop in our factory emits a large amount of irritating toxic fumes and dust when it is used to treat ductile iron and molten iron, and has strong magnesium light radiation and poor working conditions. In October 1981, we designed ourselves a “closed hood” smoke removal device, which is easy to operate and works well. We installed a fixed hood and a moving hood in front of the furnace. Fixed cover located in the iron ladle placed in the ground