High purity alumina offers an enormous resistance to acidic and basic slags. It suits a wide range of alloys and melting applications such as air melting furnaces and vacuum melting applications with a maximum service temperatur of 1620 °C.
Chrome improves the resistance to slag attack and the longevity of refractory life. The Chrome Alumina material suits air melting application perfectly, but is not recommended for vacuum melting applications. The maximum service temperatur is 1800 °C.
Magnesia Stabilised Zirconia
Zirconia has an excellent resistance to acidic slags. The stabilisation with magnesia prevents the material from volume changes. It is uneffected by Ni, Mo, Al, Fe, Pb, and Be and is mainly used for the melting of superalloys in vacuum melting applications. With its high thermal shock resistance and low tendency to erosion, the material suits excellent melting results for temperatures up to 2000 °C.
Lime Stabilised Zirconia
Zirconia has an excellent resistance to acidic slags. The stabilisation with lime prevents the material from volume changes. Due to its counteraction against the glassy or siliceous slags, it perfectly suits the melting of platinum alloys. With its high thermal shock resistance and low tendency to erosion, the service temperatur is up to 2000 °C.
Magnesia has a high resistance to basic slags, is non-wetted by Ni, Co and Fe and suits the usage in vacuum melting applications. Due to its lower density than zirconia it is used i.a. for X-ray analysis. The maximum service temperature is 2000 °C.