Taphole Filling Mass for Blast Furnace and Torpedo Ladle

Filling mass seals and maintains the taphole and free-flow area of a blast furnace, and the equivalent zone on torpedo ladle cars. It has to survive direct contact with flowing hot metal, thermal shock at every tap, and chemical attack, while still being workable enough to place and drill. It is also used on iron notch and runner repair zones.

Because of what it faces. Our ZrO₂-Cr₂O₃ grade runs 27.8% ZrO₂ and 20.6% Cr₂O₃, a chemistry chosen for resistance to slag and hot metal attack in the free-flow area rather than for alumina content alone. A standard high alumina mass is cheaper but erodes faster in this specific duty, which costs you in tap-to-tap consistency and maintenance frequency.

Maximum service temperature is 1750°C, which covers blast furnace taphole and torpedo ladle free-flow duty. As with any taphole material, the practical limit is set as much by erosion and thermal cycling at each tap as by peak temperature, so grade selection should be based on your tap frequency and metal chemistry, not on the temperature figure alone.

We supply the TRL Krosaki ZrO₂-Cr₂O₃ filling mass grade across India, with export documentation available. Send us your taphole dimensions, tap frequency and current campaign life and our engineers will confirm the grade and quantity against your drawings.