​Pleonaste Composite brick is made from high- pure sintered magnesia and composite spinel (composite fused Hercynite- corundum material) . It is one kind of non- chromium product, combining very high mechanical flexibility and high temperature. strength.

​1.High ductility (fracture- mechanical strength) and flexibility against cracking and spalling.

​2.Extreme high strength against spalling from mechanical stress (ovality, shell deformation, tire areas, thermo- shock etc. )

​3.Excellent coating formation (similar to MgO-Cr bricks, mainly due to high Fe- Oxide content )

​4.Excellent chemical resistance against alkalis, sulphat ，chlorine, clinker phases etc .

​Use for Central Burning Zone and Lower Transition Zone 

​Magnesia spinel brick is made from high grade magnesia and prefabricated spinel. It has excellent properties in good thermal shock, alkali and sulfur erosion resistance. It is suit to use at transition zone.

​1. Ability to adapt to the atmosphere changes in the kiln, no oxidation.

​2.Good thermal shock resistance.

​3.High abrasion resistance .

​4.Excellent alkali and sulfur erosion resistance.

​​5.Use for higher temperature areas .

​6.Compared with the Silicon-mullite brick the advantages is as below: higher refractoriness ，it ismore appropriate to use for the area near the burning zone; property is more stable, so suitable for cement kilns burning solid waste.