Mullite brick has obvious advantages and characteristics in glass melting furnaces, making it the key refractory for glass melting furnaces. The following are its special features:

I. High fire resistance

The fire resistance of mullite brick is usually above 1790℃, which can withstand the extremely high temperature environment in the glass melting furnace and ensure the stability during the glass melting process.

II. Excellent thermal shock resistance

Mullite brick has good thermal shock resistance, and can maintain structural stability in the environment of rapid temperature change. This is particularly important for the frequent heating and cooling operations of the glass melting furnace, which can effectively reduce the brick cracking caused by thermal stress.

III. Erosion resistance

Mullite brick has good corrosion resistance to molten glass and alkaline substances. In a glass furnace, molten glass has a strong erosion effect on refractories, and mullite brick can effectively resist this erosion and prolong the service life of the furnace.

IV. Low thermal conductivity

Mullite brick has low thermal conductivity, which can effectively reduce heat loss and improve the insulation effect of the kiln. This is of great significance for reducing the energy consumption of glass melting furnace and improving the energy utilization efficiency.

V. High dimensional accuracy

Mullite brick's precise external dimensions can reduce the adjustment process during masonry and speed up the construction. In addition, it has good machinability, can be processed into special shapes according to actual needs, reduces the number of bricks and joints, and further reduces the heat loss through joints.

VI. High temperature stability

Mullite brick has a high load softening temperature (1600-1700℃) at high temperature, and its high-temperature creep rate is low. It can maintain good mechanical properties in long-term high-temperature operation and ensure the long-term stability of kiln lining.

VII. Wide application areas

Mullite brick is widely used in glass melting furnaces, including melting furnaces, cooling channels, heating furnaces and other high-temperature areas. For example, mullite brick can be used in the bottom of melting furnace, bottom of cooling section, small furnace, regenerator lattice and other parts.

VIII. Significant energy-saving effect

Mullite brick's low thermal conductivity and low thermal capacity make it perform well in batch-operated kilns, which can significantly reduce the energy consumption required for heating. This plays an important role in energy saving and consumption reduction of glass melting furnace.

IX. Long service life

Because of its excellent corrosion resistance and high temperature stability, mullite brick has a long service life in glass melting furnace. This not only reduces the maintenance times of the kiln, but also reduces the production cost.

X. Good chemical stability

Mullite brick has stable chemical composition and low impurity content (such as Fe₂O₃, alkali metal oxides, etc.), and can maintain good performance in reducing atmosphere. This is very important for the stable operation of glass melting furnace and product quality.

To sum up, mullite brick has become an indispensable refractory in glass melting furnaces because of its high refractoriness, thermal shock resistance, corrosion resistance, low thermal conductivity, high dimensional accuracy, high temperature stability, remarkable energy-saving effect, long service life and good chemical stability.