冲天爐在熔化间断的时間(如中午休息)都用耐火土把出鉄口、出渣口堵住,等到继续熔化时經常发生打不开出鉄口、出渣口的毛病。这时,只好用鉄棍和大錘来打才能打开,而出渣口在打开以后还不容易放出渣子,必須把鉄棍插进出渣口,把渣子慢慢引出爐外。这样操作存在着下列缺点:①吹爐时,爐前火花四散,容易引起人身事故。②用錘子和鉄棍打时容易把爐底的修补材料打坏,降低了熔爐的使用 Cupola in the melting of the intermittent time (such as lunch break) are refractory soil out of the mouth, the slag hole blocked, until the melt continues to occur often do not open the mouth, slag mouth problems. At this time, had to use sticks and sledgehammers to fight can be opened, while the tap hole in the open after the release is not easy to slag, the stick must be inserted into the slag mouth, the slag slowly lead out of the furnace. This operation has the following disadvantages: ① blow furnace, the fire scattered around the furnace, easily lead to personal accidents. ② with a hammer and bang when playing easy to beat the bottom of the repair material damage, reducing the use of the furnace