Refractory Selection for Different Parts of Glass Furnaces

Modern glass furnace refractories requirements for increasingly harsh, long life, low emission glass liquid in the glass melting furnace refractories amount is growing. Different parts of the furnaces may require different refractories.
The crown of glass furnace is always operated at 1600℃. It is exposed to the conditions of high temperature, erosion of high temperature alkali vapor and batch dusts, and load. In this part, silica brick is typically used as they provide good resistance to creep and good mechanical strength at the operating temperature. In the Oxy-fuel glass furnaces, fused cast alumina block is also used as it has higher corrosion resistance to alkali vapor.
Since Zircon exhibits very low thermal losses and does not react readily with glass liquid, fused cast AZS block is probably the most used refractory in contact with the melted glass. In the working tank, the temperature is low and mild but refractories influence the quality of glass. Fused cast AZS block is preferred since they possess higher corrosion resistance to glass liquid.
The throat being the narrow path connecting the melter and the working tank, where the temperature is high and witnesses a rapid glass stream, it is subject to severe erosion. Here fused cast AZS block 41# is used.
For the glass contact parts of the sidewall, fused cast AZS block and fused cast alumina block are used. Both have good corrosion resistance to glass liquid and cause almost no pollution to glass liquid. As fused cast alumina block is not stable at high temperature and has better corrosion resistance under 1350℃, it is always used in the sidewall of cooling zone.
In the breast wall where is not in direct contact with glass liquid and exposed to alkali vapor and batch dusts, corundum block and silica brick are used.
The Magnesia bricks are mainly used as checker bricks of the regenerator. The checker bricks are working in conditions of air and coal gas, oxidation and revivification reaction, high temperature changes and condensation of alkali smoke. So the checker brick which is made of alkali refractory materials is the best choice to work for such atmosphere. High alumina bricks and fireclay bricks are also used in this parts in some cases.
Sunrise Refractory offers all kinds of refractories for glass furnaces including fused cast AZS, fused cast alumina block, silica brick, magnesia brick, etc..