Tap-hole/trough materials are used in the blast furnace at an iron-making factory and its surrounding facilities. Refractories for ladles, sliding gates, and immersion nozzles are also used for transfer and pouring process.

• ■tapping trough material
• └tapping trough material
• 　・casting material
• 　・ramming material
• 　・gunning material
• ■tap-hole material
• ■immersion nozzle
• ■sliding gate

• ■Design of tapping trough