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Refractory materials for glass furnaces abroad

2015/11/18 view:

Introduction: 1.AZS and high zirconia brick on the fused AZS brick is mainly improve the corrosion resistance and wear resistance of the production process, in addition to taking oxidation melting method, makes the product carbon content reduced to 0.005, precipitation temperature of glass phase increased to 1450 DEG C outside. The casting and annealing process are improved.

1.AZS and high zirconia brick

To the electric melting AZS brick, it is mainly to improve the anti - corrosion and wear resistance of the production process, in addition to the oxidation process, so that the carbon content of the product is reduced to 0.005, the glass phase precipitation temperature increased to 1450. Also the casting and annealing process were improved, the content of the AZS.ZrO2 content of 90 higher than that of, which has a very small size and no shrinkage hole, the thermal shock is very good, such as ZrO295, SiO21.4. stabilizer 3.7, bulk density 4.7g/cm3, gas hole rate 1400, thermal shock resistance from room temperature to 18.4 C (15 min interval) can reach 20 to 15 times. Japanese production of a fused cast zirconia brick, the zirconia content, 90, said ZFC brick, their erosion resistance is better than that of ZrO2 content is 40 AZS brick, in 1500 to 1600 DEG C, after 16 hours without glass phase precipitation, little pollution on the glass, with 800 ~ 1250 DEG C thermal shock test 40 times crack free.

2 chrome brick and chrome brick

The isostatic pressing dense chrome oxide bricks are used for the E glass and C of glass tank furnace side wall card, neck or other serious erosion of the site, life of up to 6 to 7 years. In recent years chromium products has made new progress, as in AZS brick adding Cr2O3 formation Al2O3-ZrO2-SiO2-Cr2O3 refractories, at high temperature, Cr2O3 and Al2O3 formed solid melts, on the other hand because of Cr2O3 is a high melting point material into glass and brick phase increases the viscosity of the glass phase, so as to improve the exudation of glass temperature, the glass products and anti erosion of glass is greatly improved. A company in the United States produce a combined with casting AZS/Cr2O3 refractory material, its chemical composition and physical properties are superior, and original Al2O3/Cr2O3 materials compared to the, furnace period each year to reduce power consumption 4, yield increased by 15, cost is decreased 3.75, glass quality is not affected, the brick can press molding, manual ramming forming or isostatic pressing, and high sintering temperature.

3 basic brick

After 1800 DEG C firing high pure direct combination of basic bricks are widely used for regenerative chamber wall and arch, Germany launched a new material, commodity called RUBINAIEZ, its chemical composition MgO75, ZrO213.5, SiO29.5. It is combined with zircon of periclase bricks. In the initial stage of sintering, brick structure of silicate zirconium and magnesium oxide reaction, along the periphery of the periclase particles formed protective layer of a layer of magnesium olivine and zirconia, this structure greatly improves the brick alkali resistance and resistance to sulfate erosion performance, as heat storage room in the middle of checker brick effect is good.

4 olivine magnesia brick

Olivine combined with phase has a particularly strong anti erosion performance, the erosion resistance of the through improve the combining phase magnesia brick forsterite content can improve the magnesia brick. Therefore, in the ingredients of the brick join 20 forsterite powder, formation protection magnesia particles and to reduce the erosion of magnesium olivine and matrix. The brick price is relatively cheap, and it has been widely used in the middle of the regenerator of glass furnace.

5 barium feldspar olivine brick

Because of the good corrosion resistance and thermal shock resistance, the thermal shock resistance of the brick can be improved obviously by the introduction of barium feldspar in the combination. Barium feldspar is formed in the process of sintering, and is only found in the matrix. When the content of barium feldspar is 15, the silicon is the best, and the temperature is about 1250. Urumqi building materials network research shows that barium feldspar can resist the erosion of alkali and sulfate.

6 refractory refractory

The application of the refractory material in the glass kiln is a kind of development trend. Britain uses prefabricated refractory concrete masonry block regenerator, lattice bottom brick arch, flue, furnace pallet and burner, greatly reducing the furnace structure joints, improve the furnace construction speed and shorten the cold repair time, the French SEPR ERSOL is to ER1681 fused grains as the main component made of unshaped refractory materials series, and electric melting brick supporting on the bottom of the pool, the anti erosion of glass of excellent and bubble evolution and formation calculus tendency is weaker. Japan has all the glass kiln tank bottom has been used ER2SOL series of amorphous materials. The theoretical research on the refractory materials used in the glass kiln is carried out in order to improve the corrosion resistance and improve the mechanical properties.

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