Aluminium-oxid and zirconium-oxide based fused cast refractories have excellent thermal and corrosion resistance properties therefore their use has become indispensable in modern glaze and enamel melting furnaces.

AZS type blocks comply with the extreme strain of the glaze and enamel melting furnces the best. We have been supplying them for our customers since 1965. The melt of the baddeleyite-corundum-based ZIRKOSIT products is made by an oxidising process. The high alpha-corundum and baddeleyite content ensures the refractoriness, whereas the silica and the low alkali content - forming a glassy phase - improves the thermal shock resistance. There are three different types of AZS fused cast refracotries sold under the trade name ZIRKOSIT.

ZIRKOSIT-S normal cast blocks are used in side walls and superstructures, while ZIRKOSIT-S void free blocks are recommended for the bottom pavings. ZIRKOSIT-Y void free blocks has been frequently used in the most exposed parts of glaze and enamel furnaces (such as runner blocks and runner cover bocks) with excellent results.

ZIRKOSIT-M is a medium zirconium-oxide content fused cast refractory material, which has been available since 1999.

ZIRKOSIT-M blocks can provide improved service over ZIRKOSIT-S but are less expensive than ZIRKOSIT-Y. We recommend the application of ZIRKOSIT-M blocks for those parts of the furnaces where better performance is required than is achievable by using the lower zirconium-oxide content AZS type fused cast refractory material; but where the usage of the higher zirconium-oxide material is not justified technically or commercially.

The machining of blocks is carried out by machines equipped with diamond tools. So, we can ensure the accuracy of dimensions, smooth surface and proper fitting of blocks.

After final machining of the blocks our experts assemble the furnace units and the pre-assembly can be inspected by the technicians of the users. Photografs are taken of the assemblies and supplied with the assembly drawing to the customers.