Developing Trend Of Refractories For The Glass Furnace

The need of the glass manufacturers to maintain and improve the quality of glass and expand the service life of the glass fuace and the impact and influence of the oxygen-fuel combustion technology, promote the improvement of refractories and development of the new refractories.

Fused cast alumina block has been widely used in the crown of the oxygen-fuel fuace, especially when manufacturing high quality glass. Before the application of the oxygen-fuel combustion technology, only β alumina block is used in the superstructure of the melting fuace. Now both β fused cast alumina block and α-β fused cast alumina block can be used in the crown of the oxygen-fuel fuace for producing TV glass, float glass and borosilicate glass.

Fused cast AZS block has been successfully used in the crown for many years. It can be used at 1600℃ or 1650℃ and can withstand the cycle of cooling and heating well. Compared to fused cast AZS, fused cast alumina block can be used at 1700℃ and has better mechanical strength and thermal stability.

In the past, high chromium brick was mainly used for the production of reinforced glass and sometimes in the insulation glass fuace. Now it is increasingly used in some soda-lime glass fuaces. It has much better corrosion resistance to glass and can prolong the service life of throat. Besides the throat, it is also used in the end wall, the angle brick of the feeder port. However, the chromium may color the glass liquid, thus it can not be used in the white glass fuace. It was primarily used in the colored glass fuace, but now it has been successfully used in the transparent container glass fuace.

Low glass phase fused cast AZS block has been successfully used in the superstructure. The development of the oxygen-fuel combustion technology makes it find wider application in the superstructure. Since it contains a low amount of glass phase, it has better creep resistance and the amount of exuded glass phase has been reduced to a very low level.

Fused cast high zirconia block is a new type of refractory, mainly used in the glass contact areas in high quality glass fuace. It has a low potential of causing stones, knots and bubbles and can effectively reduce glass defects. It is also in some low alkali glass or hard borosilicate glass fuaces.

Zhengzhou Sunrise is a refractory material supplier from China, offering high quality refractory materials for glass fuaces, including fused cast AZS block, fused cast alumina block, fused cast high zirconia block, mullite brick, zircon brick, alumina bubble brick, magnesia brick, sillimanite brick, corundum brick, low porosity fireclay brick, high alumina brick, all kinds of glass fuace ramming masses, etc..