A periclase (magnesia, MgO) refractory of high purity and refractoriness.
Composition; 95% MgO <2,5% SiO2
<1% Al2 O3 <2% Fe2 O3
<1% K2 <2% Na2 O
Bulk density 2,75 to 2,85g/cm3
Thermal conductivity; Around 4,0W/mK
Cold crushing strength; 45 MPa plus
Max particle size; 6mm
Max service temperature, continuous; 1800C
Water addition; Nil for dry spiking, +3-5% for ramming +6-8% for casting, use vibration.
Setting; Note that it takes days to set.
Curing; After 2 days the former may be removed and heating may start immediately. Do not leave Keraclase casting wet for too long in a hot damp climate, it will hydrate and crack.
Packaging; 25kg plastic bags.
Development no.; 115300