Sands & Clays
Olivine (EBT Sand)
Magnesium-iron silicate filler for the eccentric bottom tapping hole of an electric arc furnace. It must hold back the melt through the whole heat and then run out freely on tapping — and unlike chromite-based fillers it contains no chromium, avoiding the hexavalent-chromium question in spent material.
Typical Analysis
| Composition | Value (%) |
|---|---|
| MgO | 47 - 50 |
| SiO₂ | 39 - 42 |
| Fe₂O₃ | 7 - 9 |
| Cr₂O₃ | Chromium-free |
| LOI | < 1 |
Key Properties
| Melting point | ≈ 1760 °C |
|---|---|
| Key characteristic | Reliable EBT opening, chromium-free |
| Grain size | Engineered for EBT |
