There are three main driving force in the development and changes of the refractory: maintaining and improving the quality of the glass; glass furnace economic requirements of the furnace operation cycle longer and pure oxygen combustion system after the impact and influence.
"Current" term changes to the electronics industry and the computer industry can be interpreted as a few months or even a few weeks, talking about the development of refractories for the glass industry and application, it is very easy to be interpreted as five or ten years. According to this concept of time, we will review and discuss in the latter area (more conservative pace) in the "current" changes that have occurred.
There are three main driving force of change and development of refractory. The first is the glass manufacturer to maintain at least usually need to improve glass quality requirements. The second is the economic requirements of the glass furnace to furnace operation cycle longer, and the third is the impact and influence of the pure oxygen combustion system. These three requirements typically determine the selection of improved refractory kiln repair. These forces also contributed to the selection by the glass manufacturer in the furnace maintenance improved refractory products and the adoption of new technologies for a wide range of maintenance in the run cycle.
The molten cast alumina brick has its application in the top portion of the molten pool is established, is to be applied in the melting of pure oxygen combustion of the high-quality glass tank furnace. Β ˉ alumina brick before the advent of pure oxygen combustion technology is used for the upper structure of the melt pool, and there is no melt-cast alumina brick used the top of the molten pool. Today, both β ˉ alumina or alpha-beta alumina in molten casting products are used in the production of color TV (the screen and the cone), float glass, borosilicate glass Oxyfuel tank furnace part or all of the roof on The molten cast AZS bricks are generally able to use to 1600 ° C or 1650 ° C (depending on glass products), fused alumina brick, the roof can be successfully run at 1700 ℃. This glass manufacturers in the production of refractory glass to create better conditions and greater flexibility.
For many years, the melt-cast AZS roof has successfully withstood the test of the cooling and reheating, to enable them to be able to use a plurality of operating cycles. Now accumulated a little more experience, the successful implementation of the the fused alumina roof cooling and reheating, if they reflect the stronger economic vitality in the use of two or more of the operating cycle. The fused alumina roof observed in use (thermal state observation and shutdown observation) The results showed that both of these materials having chemical stability and mechanical stability. This is the first observation of this masonry, because at the time neither fused alumina reference, there is no basis of experience in roof applications.
High-chrome refractory products are mainly used in the past to enhance the glass furnaces, as well as a small amount used in insulating glass tank furnace. High-chrome brick are increasingly using some of the soda-lime glass tank furnace. Its main purpose is not limited to the whole or parts of the fluid flow hole, but also for the side wall and used to a limited extent on the angle of the feeding port brick. For the component of the high-chrome brick, there is a potential danger of coloring, that high chromium products are usually with Ideal "white" glass and incompatible. The products are mainly used for the initial period of this colored glass, high chromium products has been successfully used for a transparent container glass tank furnace. Number of high chromium products used in glass furnaces depends largely on its sap-hole design, the cooling of the liquid flow hole, pool heaters per day, as well as the operation of the furnace. A glass manufacturer may be able to high-chrome brick used for all cover coupled with the end wall of the melt pool. High-chrome brick building sap hole provides the potential to increase the life of the furnace, because the material is at least better than most of the erosion resistance of the glass melt AZS brick twice as strong. However, some of the design and operating parameters with different melting AZS bricks, you need to discuss with suppliers.
