The THDS400 tapping hole maintenance machine is a special-purpose device designed for tapping hole drilling and sleeve brick replacement of medium and large converters ranging from 60 to 350 tons. It can complete converter hole reaming and new sleeve brick replacement within 15 minutes. Advantages: Compared with the traditional process of removing and replacing converter tapping holes, it saves 20-30 minutes per replacement. Meanwhile, it supports remote operation via a remote controller. The adoption of this equipment greatly shortens the auxiliary steelmaking operation time, improves work efficiency, reduces labor intensity of workers and cuts labor costs. #moj_content