Introduction of Refractory Materials for Foreign Glass Kiln

Modern glass production technology compared with the traditional process has been a qualitative leap, towards a higher efficiency, lower energy consumption, better product quality in the direction of continuous development. Kiln as the core of glass production equipment, its technical level is also progressing, widely used to improve the combustion strength, strengthen the heat transfer effect, reduce heat loss, reduce the product and environmental pollution and other new technologies.

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China's glass industry has developed rapidly, has long been the world's first glass production power. The rapid development of the glass industry, naturally promote the development of China's glass kiln refractory materials and technological progress. Modern glass production technology compared with the traditional process has been a qualitative leap, towards a higher efficiency, lower energy consumption, better product quality in the direction of continuous development. Kiln as the core of glass production equipment, its technical level is also progressing, widely used to improve the combustion strength, strengthen the heat transfer effect, reduce heat loss, reduce the product and environmental pollution and other new technologies. The technological progress of the kiln requires a variety of quality refractory materials as a guarantee condition, requiring refractories to withstand higher temperatures, more abrupt temperature changes, more intense chemical erosion, more severe stress damage, and only supporting the use of multiple varieties High-quality refractory materials, kiln new technology, energy efficient, low pollution and other advantages can be achieved. High-quality refractory materials for modern high-temperature technology is not only consumable materials, but also to achieve high-temperature new technology necessary functional materials.

1.AZS and high zirconia bricks

 

The melting of AZS brick is mainly to improve its anti-erosion and wear resistance of the production process, in addition to the oxidation method of melting, so that the product carbon content down to 0.005, glass phase precipitation temperature increased to 1450 ℃ outside. Also improved the casting and annealing process, has now produced a small shrinkage volume or even no shrinkage of the fused AZS.ZO2 content of 90 or more high zirconia brick, the thermal shock performance is very good, such as ZrO295, SiO21. 4. Stabilizer 3.7 High zirconia brick, bulk density 4.7g / cm3, porosity 18.4, thermal shock resistance from room temperature to 1400 ℃ (15 minutes interval) up to 15 to 20 times. Japan produced a cast zirconia brick, its zirconia content of 90, said ZFC brick, its erosion resistance is better than ZrO2 content of 40 AZS brick, at 1500 ~ 1600 ℃, 16 hours after the glass phase precipitation, Glass pollution is very little, after 800 ~ 1250 ℃ thermal shock resistance test 40 times without cracks.

 

2. Chrome brick and chrome brick

 

To the static pressure molding of dense chromium oxide brick for E glass and C glass cell kiln wall, card or other parts of the erosion of serious, life expectancy of up to 6 to 7 years. In recent years, chromium products have made new progress, such as the addition of Cr2O3 in AZS brick to form Al2O3-ZrO2-SiO2-Cr2O3 refractory, at high temperatures, Cr2O3 on the one hand and Al2O3 to form a solid melt, on the other hand because Cr2O3 is The high melting point material, which enters the glass phase of the brick, increases the viscosity of the glass phase, thereby increasing the exudation temperature of the glass phase and greatly increasing the glass resistance to glass. A US company produces a combined AZS / Cr2O3 refractory with excellent chemical composition and physical properties. Compared with the original Al2O3 / Cr2O3 material, the annual furnace reduces power consumption by 4, the yield is increased by 15, the cost is Reduce the 3.75, the glass quality is not affected, the kind of brick can be press molding, hand pound molding or isostatic pressing, and then high temperature sintering.