Foreign glass kiln refractory types

Oct 09, 2017 1:59 pm / Posted by Eric Lee on Blogger of Google, just Follow @Eric Lee on Twitter or Praise @Eric Lee on Facebook or Plus @Eric Lee on Google+

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, efficient, energy saving, 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..

Glass Industry Refractory Materials

1, AZS and high zirconia bricks
On the fused AZS brick is 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. But also to the casting and annealing process has been improved, has produced a small shrinkage or even no shrinkage of the fused AZS.ZO2 content of 90 or more high zirconia brick, the thermal shock performance is very good, thermal shock resistance from Room temperature to 1400 ℃ up to 15 to 20 times.

2, chrome brick and chrome brick
To the static pressure molding of dense chromium oxide brick for E glass and C glass pool kiln wall, card or other serious parts of the erosion, life 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 company in the United States produces a combined AZS / Cr2O3 refractory with excellent chemical composition and physical properties. Compared with the original Al2O3 / Cr2O3 material, the annual furnace life is reduced by 4, the yield is increased by 15% 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.

3, alkaline brick
The high-purity direct bonding of alkaline bricks at 1800 ℃ is widely used in regenerative walls and arch, and Germany has introduced a new material with MgO75, ZrO213.5, SiO29.5, which is made of zircon In the initial stage of sintering, zirconium silicate in the brick structure reacts with magnesium oxide, and a layer of forsterite and zirconia protective layer is formed around the granite particles. This structure greatly improves the resistance of the brick to alkali And anti-sulfate erosion performance, do the middle of the thermal storage room lattice brick effect is good.

Glass Industry Refractory Materials

4, olivine magnets
The olivine bound phase has a particularly strong corrosion resistance, and the corrosion resistance of the magnesium brick can be improved by increasing the perovskite content in the magnesium brick bound phase. To this end, 20 parts of forsterite fines were added to the ingredients of the magnesium bricks to form a mortar-bound matrix that protects the magnesite particles and reduces the erosion. The brick price is relatively cheap, foreign has been used for a large number of glass kiln regenerator lattice in the middle.

5, barium feldspar olivine brick
In view of the good corrosion resistance of olivine and the lack of thermal shock resistance, the introduction of barium feldspar in its combined phase can obviously improve the thermal shock resistance of brick. The barite feldspar is formed during the firing process and is present only in the bound matrix phase. When the content of barium feldspar is 15, the best performance of silicon is about 1250 ℃. Studies have shown that barium feldspar can resist alkali and sulfate erosion.

6, unshaped refractories
Unstable refractory in the application of glass kiln is also a development trend. British use of refractory concrete prefabricated block masonry thermal storage room, lattice brick bottom, flue, small furnace pallets, burners, etc., greatly reducing the kiln structure of the joints, improve the furnace speed and shorten the cold repair time The

The theoretical research on refractory materials for foreign glass kilns revolves around how to further improve the anti-glass erosion and improve the mechanical properties in order to further extend the life of the kiln.

The Shixing company is adopted on producing high quality Fused Cast AZS Block used in glass furnaces. Established to produce series of shaped blocks Fused Cast AZS-33# Block, Fused Cast AZS-36# Block and Fused Cast AZS-41# Block with annual production capacity 20,000 tons/year. New materials production zone is equipped with two high-temperature shuttle kilns, mainly producing Zircon Brick, Silica Brick, Magnesia Brick, etc.

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