Refractory materials used in optical glass manufacturing

In the optical glass melting, clay kaolin clay crucible and mixer (hereinafter referred to as clay crucible and mixer). Basically belong to AI203 ~ SiO2 binary aluminosilicate refractories, with different content of AI2O3 and SiO2 to decide its manufacturing process and performance.Fused Cast AZS Bricks



In recent years, due to the development of the optical glass industry, the optical glass of the new variety is continuously increasing, and the refractories of the optical glass are also developed correspondingly. In addition to the earlier use of clay, kaolin, bauxite and other natural raw materials to create refractory material. There are pure oxide refractory products. Such as fused silica products, fused corundum products and sintered mullite and other refractory materials. For some new varieties of optical glass melting also used tin dioxide ceramics, platinum, platinum alloys, carbon materials as smelting optical glass high temperature container, the development of new varieties of optical glass and increase the amount of optical glass have played a A certain role in promoting.

In the optical glass melting process, in order to use the crucible method and pool furnace melting method is more common. Crucible type more. Pool melting method with the main furnace using a variety of special shaped or special cast refractories. Although such materials have a complex manufacturing process but a wide variety and high resistance to glass erosion and high temperature mechanical strength, these materials provide the advantages of selective use for melting various glass varieties.