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The erosion resistance of fused cast azs block to glass liquid is high, however, as the body of brick is long time in contacting with the solid-liquid interface of hot glass liquid, so it is subjected to large chemical attack and mechanical erosion, which therefore can also cause the damage to the fused cast AZS block. The analysis of erosion process of fused cast AZS block is as follows:

A modern glass melting furnace must meet the requirements of high thermal efficiency, low energy consumption, stability of the material rate, good quality of glass, and more than five years of age. This puts forward higher requirements to the storage chamber regenerator which means that the thermal efficiency of the chamber regenerator must be further improved to greatly increase the preheating temperature of combustion air.

Light refractory brick has the characteristics of small density, high porosity, small thermal conductivity, good thermal insulation and a certain pressure

strength. Fire clay bricks belong to the light refractory brick which is widely used in heat-treating facility. Below are the properties of light refractory brick.

1. Light capacity: the dry capacity of light refractory brick is only 500-700Kg/m3 which is only1/4 of ordinary concrete, 1/3 of clay bricks and 1/2 of hollow

blocks.

The main materials of glass furnace are zirconium corundum, because the production of zirconium corundum is smooth, which is suitable for producing glass and other products. However, during the use of glass furnace, occasionally there will be some abnormal conditions, below are some methods to handle abnormal operations.

1. Abnormal pressure of glass furnace

The entire furnace tank from melting tank, cooling tank until the molding part are all in contact with the glass liquid. The temperatures change from 1200℃ to 1600℃ during the whole process when the qualified glass is finished producing from material melting, and the glass liquid is in the convection state. So different parts of glass furnace need different refractory bricks.

A. sidewall brick: sidewall is mainly adopted fused cast azs block, and recently years fused cast α-β alumina is used in sidewall.

Sintered kiln of refractory is usually divided into two types: Intermittent down-draft kiln and continuous tunnel kiln, the firing temperature is from 1200 to 1900`C, and even higher. If divided by firing temperature: temperature below 1350℃ is called low temperature sintering kiln; temperature between 1350℃ and 1550℃ is called medium temperature sintering kiln; temperature between 1550℃ and 1750℃ is called high temperature sintering kiln; temperature up 1750℃ is called ultra temperature sintering kiln.

fire clay bricksare sticky soil products which refer to Al2O3 containing 30%~40% aluminum silicate material. The main mineral composition of fire clay bricks are kaolinite(Al2O3?2SiO2?2H2O) and 6%~7% impurities(oxide of potassium, sodium, calcium, titanium and iron). Fire clay bricks adopt 50% soft clay and 50% hard clay clinker, ingredient by a certain size, and sinter under high temperature of 1300~1400℃ after forming and drying.

Refractory material is an essential lining material in industrial furnace. In the continuous progress of science and technology, furnace updates from generation to generation which leads to the production process of refractory materials greatly improved. And these improvements are mainly around in the refractoriness, fire resistance, slag resistance, anti stripping and other aspects. Meanwhile, the types and applications of refractory materials have a variety of changes.

Alkaline refractory material refers to that which is easy to react with acid resistant materials, acid slag, acid flux or alumina under the high temperature. Most of the alkaline refractory materials are mainly made of magnesium oxide, calcium oxide and other alkali metal oxides. Alkaline refractory mainly contains magnesite chrome brick, magnesia zirconia brick, magnesia brick, magnesia spinel brick, magnesia calcium brick, dolomite brick and the latest development of magnesium iron spinel brick and so on.