Zirconia bricks - a revolutionary choice for high-performance, long-life refractories in the glass industry

Release Time :

May 17,2025

Influence Two important factors for the long lifespan of glass furnace materials: 1. Erosion, 2. Cracking

1. Erosion ：Glass Solution To Glass The erosive effect of glass furnace materials, Mainly depends on its physical properties such as viscosity and surface tension. Glass liquid with low viscosity and low surface tension is most easily wetted by refractory materials, and is sucked into the interior from its surface pores, causing the entire furnace material to be strongly eroded. The erosion first acts on the glassy phase in the refractory material, and they react with each other.

And The chemical erosion of borosilicate glass on furnace materials is different from that of soda-lime-silica glass, especially low-alkali or alkali-free borosilicate glass, which has a high content of acidic oxides and a high melting temperature. In the high-temperature zone of the melting pool, the viscosity of the glass flow is low, and the liquid flow is strong 。Especially is in After using electric boosting and bubbling, the liquid flow is even stronger 。 The strong scouring action combined with chemical erosion will cause great damage to the furnace materials 。

High-alkali glass has lower viscosity, and borosilicate glass has low surface tension, so their erosion is intense. Increasing the melting temperature will further reduce the viscosity and surface tension of the molten glass liquid, thus accelerating the erosion.

Glass liquids containing boric acid, phosphoric acid, fluorine, aluminum, barium, and lithium compounds have a strong erosive effect on furnace materials, especially under certain ultra-high temperature conditions. The convection of the glass liquid and the unstable liquid surface will wash away the protective layer of the phase generated by the high-temperature chemical reaction on the surface of the furnace material, accelerating the erosion. The degree of erosion is mainly related to its chemical composition, mineral composition, and structural state 。Therefore Configure dense, anti-penetration types, reduce the glass phase content of the furnace material, or even remove the glass phase components, and enhance the suppression of high-temperature chemical reactions only is prolong the life of glass furnaces Fundamental!

2. Cracking ：（ Thermal stability ）：Dense furnace materials are most easily damaged. In addition to stress caused by temperature difference, expansion or contraction caused by changes in the crystal form of refractory materials will also produce stress. When the temperature rises, the crystal form changes quickly, the volume change is too drastic, and the stress is too large, causing the furnace material to crack. Uneven surfaces and cracks on the furnace material, and internal voids will aggravate erosion and cause premature damage to local furnace materials. Therefore, controlling the thermal shock resistance of furnace materials is also one of the key factors for furnace life.

The long lifespan of the furnace means a direct reduction in glass manufacturing costs. In the development of glass furnaces, high-zirconia casting has become the best material used in the industry, but its long delivery cycle and high price have inhibited large-scale application. At the same time, the poor thermal shock performance of high-zirconia casting products and the industry's quality control capabilities have resulted in significant differences in application results.

Large-size, high-density electric melting high-zirconia bricks without silicon and sodium 5.0-5.3g/m3 Electric melting Z80 A series of research and development results of high-zirconia bricks can effectively solve the common problems in the application of glass furnace materials. Its long-term application temperature can reach 2000 degrees Celsius, and it has significant advantages in applications involving sodium, boron, lead, fluorine, and other glasses, as well as areas requiring high resistivity. Under the same working conditions above 1550 degrees Celsius, electric melting Z80 High-zirconia bricks are AZS material lifespan of 3 times or more, with strong resistance to glass solution erosion and scouring, and good repeatable heating performance. It has significant meaning for extending the lifespan of glass furnaces, low-cost operation, and comprehensive carbon emissions.

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Product Characteristics of Zirconia Ceramic Crucible