OKAYAMA GIKEN (Mining) Co., LTD. Manufactures high-quality Alumina Magnesia Spinel, a material known for its exceptional high-temperature stability, strength, and resistance to chemical attack. With years of expertise and advanced technology, We are committed to providing durable, cost-effective solutions to meet our customers' specific needs.
Alumina Magnesia Spinel (MgAl₂O₄) with a content of more than 90% is a high-grade refractory raw material. It is widely used in industrial scenarios with extremely high requirements for refractory performance due to its high density, low impurities, strong thermal shock resistance and corrosion resistance.
✔Alumina Magnesia Spinel for Iron and steel metallurgical industry (especially refining and stainless steel production)--- ladle working layer, breathable bricks, ladle seat bricks, refining ladle, RH degassing device lining
High-purity spinel has excellent slag resistance and can effectively extend the life of the ladle. It is especially suitable for steelmaking processes using high-alkalinity or high-Fe₂O₃ slag systems.
✔Alumina Magnesia Spinel for Cement rotary kiln refractory bricks---kiln tail, transition zone, firing zone
Replace traditional magnesia-chrome bricks to solve the Cr pollution problem. High-purity spinel is resistant to alkali erosion, thermal shock stability, and has outstanding environmental protection performance.
✔Alumina Magnesia Spinel for Nonferrous metal smelting---melting furnace lining, refining furnace, reverberatory furnace
Strong resistance to slag corrosion, especially strong resistance to hot molten slag in Al₂O₃, Fe, Cu, Ni systems, and not easy to peel off.
✔Alumina Magnesia Spinel for High-performance castables/prefabricated parts---used as aggregate and fine powder in low-cement or anhydrous castables, gunning materials, and self-flowing materials
Provides high hot strength and strong thermal shock stability, suitable for long-term use in easily eroded parts of thermal equipment.
✔Alumina Magnesia Spinel for High-temperature ceramics, aerospace field
As a component of high-temperature structural ceramics, it improves the stability and life of products at extreme temperatures.
| Parameter | Typical Value |
| Al₂O₃+MgO content | ≥ 90%（92–96%） |
| Bulk Density | ≥ 3.25 g/cm³ |
| Fe₂O₃ | ≤ 0.3% |
| Refractoriness | > 2100°C |
| Slag resistance | Excellent, strong resistance to CaO, FeO, SiO₂ systems |
