The application and trend of refractories for glass kiln -1

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Glass Industry.jpgModern glass production technology has been a qualitative leap compared with the traditional process, towards higher efficiency, lower energy consumption, better product quality development. Kiln as the core equipment of glass production, the technical level is also in constant progress, widely used in the improvement of combustion intensity, enhanced heat transfer effect, reduce heat loss, decrease of the new technology products and environment pollution etc..

China’s glass industry is developing rapidly, has become the largest country in the world the first glass production. The rapid development of glass industry, promote natural progress of refractories for glass kiln Development and technology in china. Modern glass production technology has been a qualitative leap compared with the traditional process, towards higher efficiency, lower energy consumption, better product quality development. Kiln as the core equipment of glass production, the technical level is also in constant progress, widely used in the improvement of combustion intensity, enhanced heat transfer effect, reduce heat loss, decrease of the new technology products and environment pollution etc.. Technical progress of kiln require high quality refractory material has many species as the security conditions, requirements of the refractory material can withstand the high temperature, the temperature changes more rapidly, more intense chemical erosion, more severe stress failure, only the supporting application of multiple varieties of high quality refractory materials, high efficiency, energy saving new technology of kiln, low pollution the advantages can be realized. High quality refractory materials for modern high technology is not only the material consumption, but also is a functional material necessary to achieve high new technology.

Foreign glass kiln refractories for 1.AZS and high zirconia brick on the fused AZS brick is mainly to improve the corrosion resistance and wear resistance of the production process, in addition to the oxidation of molten, make the product of carbon content to 0.005%, improve the temperature of glass phase precipitation to 1450 degrees outside. Also on the casting and annealing process was improved, now produce shrinkage volume is very small and even no shrinkage of the fused AZS.ZrO2 content of 90% above high zirconia brick, the thermal shock performance is very good, such as ZrO2>95%, a high zirconia brick SiO2<1.4%. stabilizer <3.7%, 4.7g/cm3 bulk density, porosity of <18.4%, thermal shock from room temperature to 1400 C (15 minute intervals) can reach 15~20 times. Japan produced a kind of fused cast zirconia brick, the zirconia content >90%, called the ZFC brick, its corrosion resistance is better than the ZrO2 content of AZS brick 40%, at the temperature of 1500~1600 DEG C, after 16 hours without glass phase precipitation, on glass by 800~1250 DEG C, little pollution, thermal shock test 40 times without crack.

Chrome brick and chrome brick to isostatic pressing forming dense chrome oxide bricks for E glass and C glass tank furnace side wall, neck or other serious erosion area, life can reach 6~7 years. Chromium containing products in recent years has made new progress, such as joining in the AZS Cr2O3 formation of Al2O3-ZrO2-SiO2-Cr2O3 brick refractory materials at high temperature, Cr2O3, on the one hand and the formation of Al2O3 solid solution, on the other hand, because the Cr2O3 is a high melting point material into the brick, glass increased the viscosity of the glass phase, thus improving the exudation temperature of glass phase the glass products, glass erosion resistance is greatly improved. American a company to produce a combined with Fused Cast AZS/Cr2O3 refractories, its chemical composition and physical properties are superior, compared with the original used Al2O3/Cr2O3 materials, reducing the power consumption of the 4% year period of furnace, the production increased 15%, the cost is reduced by 3.75%, the glass quality is not affected, the brick can machine pressure molding, manual tamping play shaping or isostatic pressing, and then high temperature sintering.

Alkali brick is 1800 DEG C firing high pure direct combining basic bricks are widely used in chamber wall and arch, Germany introduced a new kind of material, the trade name RUBINAI.EZ, its chemical composition is MgO75%, ZrO213.5%, SiO29.5%, it is the periclase bricks combined with zircon, in the initial stage of sintering, zirconium silicate and Magnesium Oxide reaction brick structure, formed along the periclase particles around a layer of magnesium olivine and zirconium oxide protective layer, this structure can greatly improve the brick alkali resistance and resistance to sulfate erosion performance of regenerator checker brick, as central to good effect.