OKAYAMA GIKEN (Mining) Co., LTD.provides fine Refractory Magnesia Spinel(MgAl₂O₄) powder (-200 to -325 mesh) with high reactivity, making it the perfect matrix material for low-cement castables, self-flow mixes, and insulating linings. Improves strength and thermal shock resistance.
At OKG, we supply high-quality refractory magnesia spinel (MgAl₂O₄) designed to withstand the toughest industrial environments. Our spinel products combine excellent thermal shock resistance, chemical stability, and mechanical strength, making them a critical component in a wide range of refractory applications.
From steel ladles and electric arc furnaces to cement rotary kilns and non-ferrous metal linings, OKG spinel ensures long service life and reliable performance under extreme heat and corrosion.
✔ High purity
✔ Sintered and fused types
✔ Stable supply with strict quality control
✔ Custom sizes: 0–1mm, 1–3mm, 3–5mm, -200 mesh, -325 mesh
OKG supplies both sintered spinel and fused spinel, tailored for customers producing:
✔Steel ladle linings
✔EAF and tundish zones
✔Cement rotary kiln transition zones
✔High-strength refractory castables
✔Foundry and non-ferrous metal linings
✔Precast shapes and monolithics
Aggregates: 0–1mm, 1–3mm, 3–5mm, 5–8mm
Powders: -200 mesh, -325 mesh (reactive spinel)
Custom particle sizes available on request
| Parameter | Typical Value |
| Al₂O₃ | 70–75% |
| MgO | 25–30% |
| Bulk Density | 3.10–3.30 g/cm³ |
| Fe₂O₃ | < 0.6% |
| Refractoriness | > 1900°C |
| Phase Composition | 100% MgAl₂O₄ Spinel |
