Introduction of refractory materials for foreign glass kiln.

The modern glass production technology has a qualitative leap compared with the traditional technology, which is developing towards higher efficiency, lower energy consumption and better product quality. Kiln as the core of the glass production equipment, its technology level also in constant progress, widespread adoption of improved combustion intensity, strengthening heat transfer effect, reduce the heat loss, reducing of the product and the environment pollution and so on new technology.

China's glass industry has developed rapidly and has already become the world's largest producer of glass. The rapid development of glass industry has naturally promoted the development and technological progress of refractory materials for glass kiln in China. Compared with traditional technology, modern glass production technology has made a qualitative leap, which is developing towards higher efficiency, lower energy consumption and better product quality. Kiln as the core of the glass production equipment, its technology level also in constant progress, widespread adoption of improved combustion intensity, strengthening heat transfer effect, reduce the heat loss, reducing of the product and the environment pollution and so on new technology. Kiln technology progress requires many varieties of high quality refractory materials as a condition of protection, fire-proof material can withstand higher temperature, the more rapid temperature change, strong chemical erosion, and severe stress damage, only used for many varieties of high quality refractory material, kiln new technology of high efficiency, energy saving, low pollution and other advantages to be realized. High quality refractories are not only consumable materials for modern high temperature technology, but also the functional materials necessary for high temperature new technology.

Refractory materials for foreign glass kiln.

1.AZS and high zirconia bricks.

For fused AZS brick is mainly to improve its resistance to erosion and abrasion resistance production process, in addition to taking melt oxidation method, the carbon content of dropped to 0.005, glass phase separation temperature to 1450 ℃. Also for casting and annealing process was improved, now produce shrinkage cavity volume is small or even no shrinkage cavity fused AZS. ZrO2 content of more than 90 high zirconia brick, its thermal shock performance is very good, such as ZrO295, SiO21.4. Stabilizer 3.7 high zirconia brick, volume density of 4.7 g/cm3, porosity 18.4, thermal shock resistance from room temperature to 1400 ℃ (15 minute intervals) can reach 15 ~ 20 times. Japan produced a kind of fused zirconia brick, the zirconium oxide content in 90, said ZFC brick, its corrosion resistance is superior to the content of ZrO2 is 40 AZS brick, under 1500 ~ 1600 ℃, 16 hours after glass phase separation, little pollution to the glass, by the 800 ~ 1250 ℃ after thermal shock test 40 times no crack.

2. Chrome brick and chrome brick.

It can be used for 6 ~ 7 years in the wall, neck or other erosion areas of E glass and C glass pit. Chromium products have a new progress in recent years, such as add Cr2O3 formation of Al2O3 in AZS brick - ZrO2 - SiO2 - department of Cr2O3 refractories, at high temperatures, Cr2O3 and Al2O3 form solid solution on one hand, on the other hand because of Cr2O3 is high melting point material, into the glass phase of the brick increases the viscosity of glass phase, thus raising the exudation temperature of glass phase, make glass glass erosion resistance is greatly increased. A U.S. company to produce a combined with fused cast AZS/Cr2O3 refractory, the chemical composition and physical properties is very superior, compared with the original with Al2O3 / Cr2O3 materials, furnace every year period to reduce the power consumption of 4, yields by 15, lowering cost 3.75, glass quality is not affected, this kind of brick can pressure molding machine, manual ramming forming or isostatic pressing molding, and then high temperature sintering.

3. The basic brick

After 1800 ℃ sintering of high purity directly combined alkali bricks are widely used in regenerative chamber wall and the self-closed, Germany introduced a new material, the commodity name RUBINAIEZ, its chemical composition is MgO75, ZrO213.5, SiO29.5, it is to use the combination of zircon periclase bricks, in the early sintering brick structure of zirconium silicate and magnesium oxide reaction, around the periclase grains to form a layer of magnesium olivine and zirconium oxide layer, this kind of brick structure has greatly increased the resistance to alkali and sulfate erosion resistance, do good central effect of checker brick regenerator.

4. Olive stone magnesia brick.

The combination of olivine and olivine has a particularly strong resistance to erosion, which can improve the corrosion resistance of magnesia brick by improving the content of magnesium olivine in magnesium brick. For this reason, 20 magnesium olivine powder is added to the ingredients of magnesia brick to form a magnesium olivine which can protect the magnesite particles and reduce erosion. The price of the brick is relatively cheap, and it is widely used in the middle of the glass kiln.

Barium feldspar brick.

In view of the good corrosion resistance of olivine and the lack of thermal shock resistance, the introduction of barium feldspar in the combination phase can obviously improve the thermal shock performance of the brick. Barium feldspar is formed in the process of sintering and is only stored in the matrix. Barium feldspar content is 15, the optimum properties of silicon, using temperature is 1250 ℃. Studies have shown that barium feldspar can resist the erosion of alkali and sulfate.

6. Unshaped refractory materials.

The application of refractory refractory in glass kiln is also a developing trend. Britain USES refractory concrete precast block masonry regenerator, checker brick bottom self-closed, furnace flue, small plate, burner, etc., greatly reducing the kiln structure joint, improve the construction speed and shortens the time of cold repair France heap ERSOL is ER1681 fused particles as the main ingredients of amorphous refractory series, and fused brick used in the bottom, the glass erosion resistance is good, precipitation and air bubbles and the tendency of stone formation is weak. In Japan some glass kiln floor has already used the ER2SOL series of indeterminate materials. The theoretical research of refractory materials in foreign glass kiln is focused on how to further improve the anti-glass erosion and improve the mechanical properties, so as to prolong the life of the kiln.