Anhydrous taphole mud is made of corundum, silicon carbide and coke fines with resin binder for blast furnace taphole sealing. It sinters fast, plugs densely and resists molten iron and slag scouring, ideal for large and medium blast furnaces under high pressure.
| Al₂O₃ content | 30%～45% |
|---|---|
| SiC content | 15%～25% |
| Binder type | Anhydrous resin bonded |
| Bulk density | ≥ 2.1 g/cm³ |
| CCS (1200℃×3h) | ≥ 20 MPa |
| CCS (1400℃×3h) | ≥ 30 MPa |
| Service temperature | ≥ 1500℃ |
| Suitable furnace volume | 1,000–5,000 m³ blast furnaces |
Anhydrous taphole mud is an unshaped refractory used to seal and protect the taphole of blast furnaces, made from refractory aggregates such as corundum, silicon carbide and coke fines bonded with resin or tar-based organic binders. Compared with conventional water-based taphole clay, anhydrous mud features a stable bond system and fast sintering, quickly forming a dense, high-strength mud core after tamping that withstands repeated scouring by molten iron and slag. It is the standard taphole material for large and medium-sized blast furnaces under high-pressure operation.
Anhydrous mud uses resin or tar binders — fast sintering, dense plugging and high strength, suitable for large and medium BFs under high pressure; water-based clay uses clay binder — lower cost and easy opening, mostly for small and medium BFs. With larger furnaces and higher top pressure, anhydrous mud has become the mainstream choice.
The key is controlling gunning pressure and mud volume to keep the mud core dense, combined with a proper tapping schedule and taphole depth maintenance. We provide supporting technical guidance for taphole operation.
The hardened anhydrous mud plug drills well with the taphole drill — it seals tightly yet opens easily, keeping the normal tapping rhythm.
Yes. Henan Songrui New Refractory Materials Co., Ltd. supports custom formulations by furnace volume, top pressure, taphole depth and tapping practice, with on-site technical service.
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