Depth,angle and straight-line rate of taphole can be well controlled by selecting rational taphole drill.Pneumatic taphole drill has obvious advantages in taphole maintenance.

• 控制合适的铁口深度、角度和直线度是铁口维护的关键,因此必须选择合适的开铁口机。采用气动开铁口机是铁口维护的可靠保障。