The use of Fused Cast refractories in glass furnaces

AZS brick is also called fused cast AZS block. It is made by melting raw materials in an electric arc furnace, then cating the melt into a mold and cooling it into solid. It is mainly used in glass furnaces. What should pay attention to during the manufacruring process is the voids caused by the volume shrinkage.

There are four casting ways for AZS refractory bricks: PT, QX, ZWS and WS. The different cating ways of AZS bricks can meet the requirements of different pats in different glass furnaces. It has great corrosion resistance and a long service life.
Currently, there are three important driving forces of the development of AZS refractory. The first is the requirement to maintain or improve the quality of glass quality. The second is the longer service life. And the final one is the effect of the oxygen-fuel system. The three aspects determine the selection of refractory bricks.
Fused cast alumina block has been used in the crown of glass furnaces. Before the emergency of oxygen-fuel technology, only beta alumina bricks are used in the crown. Nowadays, beta or alpha-beta fused cast blocks are also used in the crown of TV glass furnaces, float glass furnaces and borosilicate glass furnaces.
Fused cast AZS bricks can be used at 1600-1650℃, while fused cast alumina bricks can be used at 1700℃. This provides a better promise for the production of high-melting glass.