Analysis on the Development of Glass Industry Refractory in China

Over the past decade, China's glass industry with refractory materials have made great progress, integrated in the large-scale float glass kiln kiln, from 3 to 4 years to 5 to 8 years, and all the materials to achieve the localization, greatly Narrowing the gap with the advanced level of foreign countries, for the glass industry with the future development of refractories, laid a solid foundation. But with the further development of the glass industry needs and foreign advanced level, there are still many problems to be solved.

After China accession to the WTO, foreign high-quality low-cost products can drive straight into the same time, China's quality products into the international market has become more convenient. Seize the opportunity to seriously analyze China's glass industry refractory problems and the gap with the world's advanced level, to take the right countermeasures, as soon as possible to narrow the gap with the developed countries, catch up with the world's advanced level, which will be our response to WTO challenges Best response. The following will be based on the current main problems, combined with the future development of thinking, put forward some suggestions.



First, bigger and stronger With strong technical innovation strength and international competitiveness of the Ministry of Industry and Trade integration of large supporting refractory leading enterprises, so as to enhance the overall level of the industry, driven by the development of the industry as the dominant force.

At present, the glass industry refractory industry there are many enterprises, small scale, decentralized, low-level redundant construction, their own war, the market disorderly competition and so on, resulting in the overall level of the industry to improve slowly. In recent years, China has built more than 30 refractory refractory enterprises, these enterprises in recent years despite the majority of different degrees of progress, but most of the smaller production scale, weak technical force, backward technology and equipment , Product quality is difficult to guarantee. Sintered refractories have a similar situation. Thus forming a common product over the one hand, on the other hand high-end products still need to import the situation, and because of these enterprises cheap dumping, resulting in market chaos, a backbone enterprises to improve product quality barriers. Therefore, the urgent need for strength of the industry and trade integration of the refractory company, to ensure the quality of reliable quality supporting refractory materials. This kind of company can use its own strong integration of resources, bigger and stronger, and guide the industry to continuously improve the overall level, climbing new peaks. The so-called bigger is the company to have their own control of a certain size of the cast refractories, alkaline refractories, silica bricks, zirconium, zirconia corundum, sillimanite, mullite refractories and new unshaped refractory production base And supporting system, can provide the whole kiln quality supporting refractory materials to meet the glass industry, including the glass fiber industry, the demand for refractories. The so-called strong, is to rely on the new strong, make full use of strong technical advantages, continuous technological innovation, enhance the overall level of the industry, making it an international competitiveness of large refractory supporting companies.

Second, the design of glass melting furnace, the production of refractory materials, the operation of the furnace, maintenance, use and refractory production and use of scientific research between the four closely, is to extend the kiln kiln, as soon as possible to reach the international advanced level One of the important conditions.



To extend the kiln kiln must have two conditions: First, the integration of industry and trade supporting the refractory company, to provide all kinds of high-quality refractory refractory materials; the second is to design, production, use and research Close combination, to play their respective advantages, so that the whole kiln refractory configuration more reasonable, especially the kiln age of more than 8 years of high-grade melting pot, has not entirely rely on to improve the quality of refractories can be achieved. Superb design, careful operation, maintenance and management of quality and supporting the supply of refractory materials must be closely integrated in the past that the tube of a section, do not communicate with each other, out of touch with each other, the lack of the overall concept of the situation is the long melting of the kiln kiln One of the important reasons.

The current problem is how to implement? Who will be implemented, first of all by the combination of the four parties? According to past experience, with strong technical strength of the industry and trade integration of refractory materials supporting the company most suitable, on the one hand, Refractory material performance and data to master, you can recommend to the design and use of various ancillary programs to choose from; on the other hand to the use of the Department to provide the required variety of quality supporting refractory materials, and tracking the use of, constantly To provide users with services to help solve the problems that may arise in the use of the Quartet string together, often communicate, complement each other to form a whole, together to improve the kiln kiln and the relevant technical and economic indicators and efforts. Of course, industry associations should also give full play to the industry self-discipline and industry coordination functions, the industry elite to achieve this goal together.

News about the development of Glass Refractory Industy in China

The development of refractories has three main drivers: to maintain and improve the quality of the glass; the economic requirements of the glass furnace to make the kiln longer operating cycle and the use of pure oxygen combustion system after the impact and impact.

The current changes in the electronics industry and the computer industry can be interpreted as months or weeks, and when it comes to the development and application of refractory materials in the glass industry, it can easily be interpreted as five or ten years. According to this concept of time, we will review and discuss changes that have taken place in the "future" (more conservative pace) in the "current".



There are three main drivers for the change and development of refractory materials. The first is the need for glass manufacturers to maintain at least to maintain the quality of the glass. The second is the economic requirements of the glass furnace to make the kiln run longer, and the third is the pure oxygen combustion system to bring the impact and impact. These three requirements usually determine the use of improved refractory materials in the kiln. These drivers also enable glass manufacturers to use improved refractory products during kiln maintenance and use and new technologies for extensive maintenance during the run cycle.

The molten cast alumina brick has been used in this part of the melting tank to build its application, mainly in the melting of high quality glass pure oxygen burning furnace furnace has been applied. Prior to the advent of pure oxygen combustion technology, only beta-alumina bricks were used to melt the superstructure of the pond, and no molten cast alumina bricks were used on top of the melting tank. Now, fermented cast products, whether beta-alumina or alpha-beta alumina, are used in the production of color television (screens and cones), float glass, and borosilicate glass in part or all of the furnace on. The molten cast AZS brick can generally be used at 1600 ° C or 1650 ° C (depending on the glass product), while the furnace with a fused alumina brick can be successfully operated at 1700 ° C. This creates better conditions and greater flexibility for glass manufacturers in the production of refractory glass.

For many years, molten cast AZS furnaces have been successfully tested for cooling and reheating so that they can use multiple operating cycles. Now a little experience has been gained in the successful implementation of the fused alumina furnace top cooling and reheating, when they use two or more operating cycles to show more economically viable vitality. The results of the fused alumina furnace tops observed during use (thermal observation and shutdown observation) show that these materials are both chemically stable and mechanically stable. This was the earliest observation of this masonry, since there was no reference material for fused alumina at the time and no empirical basis for its application at the top of the furnace.



High chromium refractory products used in the past mainly used to enhance the glass melting furnace, and a small amount used in the insulation glass pool furnace. Now high-chrome bricks are being used more and more by some soda-lime glass pits. Its main use is not limited to all or part of the flow hole, but also for the end wall and to a limited extent for the feed mouth of the angle brick. For the components of high chrome tiles, they are potentially tedious, so that high chromium products are usually not compatible with very "white" glass. The initial period of this product is mainly used for colored glass, but now high-chromium products have also been successfully used in a transparent container glass furnace. The amount of high chromium products used in glass furnaces depends to a large extent on the design of their flow holes, the cooling of the liquid bath, the daily production of the furnace, and the operation of the furnace. A glass manufacturer may use high chrome tiles for all cover plates plus the end wall of the melting tank. The flow of high-chrome brick masonry provides the potential to increase the life of the kiln because the corrosion resistance of most of the material to the glass is at least twice that of the molten AZS. However, some of the design and operating parameters are different from the molten AZS brick, it is necessary to discuss with the supplier.

The main problems faced by Glass Industry Refractory Materials

The main problems faced by Glass Industry Refractory Materials is the development of low temperature melting. Arsenic-free material melting process, the whole oxygen combustion technology and the development of electric melting technology, refractory material to make more stringent requirements.

Recent years, the life of glass melting furnace has been greatly improved, the production of flat glass float production line up to 10 years, ordinary glass melting furnace life of 5 to 7 years, special glass melting furnace life of up to 2 years , So the refractory material must have high resistance to erosion, the impact on the glass quality is small, the environment does not cause pollution, quality and energy saving effect is obvious and other functions.



In order to improve the quality of glass, refractory materials in addition to the use of the traditional No. 1, No. 36, No. 41 zirconia corundum brick (AZS), a 94% zirconium oxide casting brick (ZFC) has also been developed. This high zirconia cast brick has better performance than AZS bricks. Such as less glass phase, anti-glass erosion, greatly reducing glass products such as bubbles, stones and other defects. Therefore, this cast brick can be adapted to a variety of glass melting, such as aluminum silicate glass, electronic glass and boron - silicate glass.

In order to adapt to the development of electrofusion technology, the researchers developed a 90% zirconia-containing cast brick (ZFCR), the high temperature resistivity is ZFC cast brick 10 times. Thus showing excellent resistance to erosion.

Glass Kiln Refractory's Technology Evaluation and Development Trend in China

China's glass kiln refractory material development, will continue to focus on the life of glass melting furnace, glass product quality and cost, energy consumption and environmental protection and other aspects, that is, glass kiln refractory materials are facing the main problem is low temperature melting development of.

With the glass melting furnace oxygen-rich combustion, oxygen burning, arsenic-free material melting process and electric welding technology to promote the use of refractory materials, especially cast refractory materials put forward higher requirements.

With the development of science requires a higher performance of refractory materials, which also need to develop more new refractories, and the corresponding evaluation techniques. In short, the maximum to meet people's production needs.

Technology Evaluation of Glass Kiln Refractory
1.Continuous bubble experiment
Continuous bubble experiment is a method of directly observing the bubbles occurring at high temperature. By recording the aging at high temperature into a television image, it is possible to observe the occurrence of bubbles of refractory material for a long time and continuously, and to carry out a method of making a bubble closer to the actual kiln Evaluation. Since the aging change can be measured, the bubble generation rate of the refractory material represented by the following formula can be measured. This is from the unit area of ​​refractory material that the number of bubbles per unit time, can be more accurate evaluation.
2. Corrosion resistance
Corrosion test methods for refractory materials for glass fines, with dynamic erosion test methods and static erosion test methods. The former generally use the rotary erosion test method, which generally use finger test and clamp vortex test method. However, these methods are not likely to exhibit good corrosion resistance with good reproducibility for all refractory materials and glass, and it is desirable to have a good reproducibility test method in order to compare the corrosion resistance of the refractory to the glass. 3. Volatile steam test

From the viewpoint of reducing NOX and energy saving, oxygen combustion technology is noticeable. When the amount of combustion exhaust gas is reduced to about one fifth when the combustion from air combustion to oxygen is carried out, the concentration of volatile matter such as R2O, B2O3, PbO, and SiO in the upper space of the glass kiln is greatly increased and the water vapor partial pressure is increased. The increase in the concentration of these volatile components and the increase in water vapor partial pressure, such as Na2O as NaOH, will tend to further increase its erosivity, accelerate the erosion of the upper space refractory material, affecting the life of the kiln. Therefore, it is important to select a test for evaluating the refractory material for the upper space when oxygen is used.



Development Trend of Refractory Material Production Technology
1. More widely used synthetic raw materials and selected minerals as refractory materials to improve the purity and density of raw materials, it is estimated that the use of such raw materials will reach about 30%.
2. In the processing process, to further strengthen the raw materials and semi-finished products of physical and chemical effects, such as the use of ultra-fine grinding machine for fine grinding, mixing equipment, highly uniform, the use of fused raw materials to strengthen the interaction of components, High pressure molding and according to the refractory material structure and performance to improve the firing temperature.
3. Widely used composite materials to strengthen the refractory structure of the grain boundary parts, to the direction of high-performance ceramic development.
4. Develop energy-saving non-fired products and unshaped refractories through low-temperature treatment and various bonding agents (ceramic suspension, colloidal solution, tar, etc.).
5. Study and make full use of the chemical properties of carbon and the interaction between carbon and other components and various additives that can affect fire resistance.

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.

Glass Refractory Industy news and the best glass refractory supplier from China

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. 

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. 



Foreign refractory materials for glass kilns 

1.AZS and high zirconia brick
On the melting of 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. The casting and annealing processes have also been improved to produce fused AZS with little or no shrinkage. ZrO2 content of more than 90% of the high zirconia brick, the thermal shock performance is very good, such as ZrO2> 95%, SiO2 <1.4%. Stabilizer <3.7% of high zirconia brick, the bulk density of 4.7g / cm3, porosity <18.4%, thermal shock resistance from room temperature to 1400 ℃ (15 minutes interval) up to 15 to 20 times. Japan produces a cast zirconia brick with a zirconia content of> 90%, called ZFC brick, and its corrosion resistance is better than ZrO2 content of 40% of the AZS brick, at 1500 ~ 1600 ℃, 16 hours after the glass phase Precipitation, little pollution on the glass, 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 re-bonding AZS / Cr2O3 refractory, its chemical composition and physical properties is excellent, compared with the original Al2O3 / Cr2O3 material, the annual furnace to reduce power consumption 4%, yield increased by 15% The cost is reduced by 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. Basic bricks
The high purity directly combusted alkaline brick at 1800 ℃ is widely used in regenerative walls and arch. Germany has introduced a new material named RUBINAI · EZ with its chemical composition of MgO 75%, ZrO213.5%, SiO29 .5%, it is zirconite with the combination of magnesite bricks, in the early sintering, brick structure of zirconium silicate and magnesium oxide, along the granite around the formation of a layer of forsterite and zirconia protective layer, This structure greatly improves the brick anti-alkali and anti-sulfate erosion performance, do the middle of the thermal storage room lattice brick effect is good. 

4. Olivine magnets
The olivine-binding phase has a particularly strong resistance to erosion, and the corrosion resistance of the magnesium brick can be improved by increasing the forsterite content in the magnesium briquette phase. To this end, 20% of the perovaleite fines were added to the ingredients of the magnesium bricks to form a mortar-binding 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 fossil olivine brick
In view of the good erosion 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 the brick. The barium 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 sulphate 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 arch, flue, small furnace pallets, burners, etc., greatly reducing the kiln structure of the joints, improve the furnace speed and shorten the cold repair time , France Xipu ERSOL ER1681 is based on ER1681 fused particles as the main component of the amorphous refractory series, and the use of electric frit with the bottom of the pool, its excellent anti-glass erosion, and the tendency to precipitate bubbles and the formation of stones Weak. Some of Japan's glass kiln bottom has all used ER2SOL series of unshaped materials. 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. 

7. Insulation material for glass kiln
Foreign glass kiln insulation widely used high alumina brick, lightweight silicon brick and fiber, mainly based on aluminosilicate fiber-based materials. In Germany, in addition to the use of diatomaceous earth, aluminosilicate and silicate fiber materials, widely used calcium silicate-based light products, in addition to Didier and the glass industry in close cooperation with the development of a composite board, It is made up of two materials, called "SSH" (Shood Supral H). The first layer in the composite panel has a thickness of 50 to 75 mm and is made of a relatively dense clay refractory. The thickness of the second layer is 100 to 125 mm. It is made of ultra-lightweight refractory (refractory clay or calcium silicate Material) made. The total thickness of the composite board is 150 to 200 mm, and the size of the composite board is the same as the size of the brick surface to be insulated. 

The CIS uses light phosphate concrete, fiber products and fillers. The binding agent for the light refractory granule filler is an aluminophosphate binder, the acid ratio of the binder is 2.3, the density is between 1.55 and 1.6 g / cm3, the particles are industrial Al2O3, artificial Al2O3, and the working temperature is 1800 ℃. Lightweight phosphate concrete is a kind of new type of lightweight heat-resistant concrete made of phosphate as binder and porous clay. The main performance parameters of light phosphate concrete are: density 800 ~ 1100kg / m3 , The compressive strength range is 7 ~ 12MPa, the thermal conductivity is 0.3 ~ 0.35W / cm · k, the long-term use temperature is 1270 ℃.

Magnesia Brick - The best Magnesia Brick from China Zhengzhou Shixing Refractory

The magnesia brick are fused magnesia as main raw material, after a reasonable size distribution, high pressure forming, high-temperature sintering. The product has strong resistance to slag corrosion ability and high temperature dimensional stability. Mainly used in the regenerator, the upper part of glass furnace.

  The regular magnesia bricks are made from dense dead burned magnesia that makes the bricks in good refractoriness, corrosion-resistance, and widely used in checker chamber of glass tank, lime kiln, non-ferrous metallurgical furnaces, open heart furnace, iron mixer and EAF of steel-making, and also ferro-alloy furnace, etc.

  The bricks with MgO 95% or more in content take the secondary-burning dead burned magnesia or electrofused magnesia as the raw material and burned under the condition of ultra high temperature. They have the features of highly directly bonded and corrosion-resistance and widely used in various kinds of high temperature kilns and furnaces.



Physical and chemical for Magnesia Brick
Application:
1.The regenerative chamber for the ceramic frit kiln, sodium silicate and glass furnace
2.The furnace lining of iron and steel industry, such as ferroalloys furnace, metal mixer
3.The non-ferrous metallurgy industrial furnace lining, such as the furnace copper, lead, zinc, tin, etc
4.Calcining kiln, shaft kiln and tunnel kiln for refractory material industry
5.The lining for cement rotary kiln
Characteristics:
Excellent performance of basic slag resistance, high refractoriness, thermal stability, anti-erosion and anti-peeling
Excellent strength of pressure bending, abrasion proof
Excellent performance of high-temperature firing, high rates of associative property, anti-erosion ability
Excellent thermal shock resistance and spalling resistance
Excellent ability of high refractoriness, anti-erosion of alkaline residue
High temperature load of refractoriness under load. High mechanical strength
High temperature resistance excellent corrosion resistance
Resistance to spalling

Silica Brick - The best Silica Brick from China Zhengzhou Shixing Refractory.

Adopts high quality silica and advanced technology, our silica bricks enjoy the advantages of high purity, long service life, good thermal conductivity, high refractoriness under load, and good creep resistance. In addition, it has accurate size tolerance, pure color and luster appearance. Because of the bad thermal shock resistance of silica brick, it is mainly used in the continuous operating furnace. Supporting the use of other high quality refractories, our silica brick can extent the service life of float glass furnace to 8 years and double the service life of bottle glass furnace. It is widely used in coke oven, hot blast furnace, glass furnace and carbon furnace.

Applications:
The silica brick can be widely used in coke oven, hot blast furnace, glass furnce and carbon furnace. In glass industry, it is mainly employed to build the doghouse crown, suspended wall of channel, top crown and inlet sealing. In metallurgy industry, it is adopted as the nozzle brick.
Doghouse crown, suspended wall of channel, top crown and inlet sealing of glass furnace
High temperature part of coke oven.

Characteristics:
1. High purity
2. Long service life
3. Accurate size tolerance
4. Pure color
5. Luster appearance
Advantages:
1. Good thermal conductivity
2. High refractoriness under load
3. Good creep resistance
4. High refractoriness



Conventional Silica Brick for Glass Furnace
Characteristics
1. Accurate dimensions
2. Extra low impurity
Technical Data



Zero Expansion Silica Brick-Standard Shape
Characteristics
1. No preheating required, less disruption for normal production
2. Excellent thermal shock resistance, 1100℃ with water more than 30 cycles
3. Almost zero thermal expansion coefficient
4. Enough capacity to produce very large blocks and complex shapes
Application
Hot repair of glass furnace
Technical Data





Zircon Brick - The best Zircon Brick from China Zhengzhou Shixing Refractory.

Zircon Brick is made by the zircon ore as raw material, adding a small amount of plastic clay, mixing, compacting and calcined into clumps. The lump is then crushed and added a small amount of plastic clay or other organic binders and mixed, shaped, and burned. Calcination and firing temperature should not exceed 1600 degrees, generally can be done by 1400 hours under a long time insulation to burn.



Zircon Brick from China Zhengzhou Shixing Refractory Co., Ltd. is for alkali-free glass, soda lime glass, lead glass, borosilicate glass, electronic and optical glass melting furnace flame space Superstructure: widely used gap with fused zirconia corundum brick between the arch foot brick small brick furnace, thermocouple brick, brick observation hole, initial sub-layer and a backing bricks, etc.

Shixing Zircon Brick is suitable for laying ladle lining, high temperature induction furnace, aluminum smelting furnace. It can also be used in glass furnace which is easy to damage, with the cheapest price and the best after-sale services, you can choose the Zircon Brick from China in an easy and safe way.

http://www.sxrefractory.com/zircon-brick.php

Fused Cast AZS-41# Block - The best Fused Cast AZS-41# Block from China Zhengzhou Shixing Refractory.

Fused Cast AZS-41# Block with the highest ZrO₂ content produced by Shixing. This type of AZS has been widely used in the most exposed parts of glass melting furnace.

Fused Cast AZS-41# Block have passed the ISO international certified, are made of high pure material, fired at high temperature by advanced technology, with the advantages of high strength, high compression resistance, good thermal shock resistance, good performance in high temperature, good thermal conductivity, good erosion resistance and so on. Widely be used for linings of furnace in industries.



Advantages:
1. Compact microstructure
2. Good erosion resistibility to molten glass
3. Good thermal shock resistibility
4. Barely rendering blister
Application
Mainly used for sidewalls, doghouses, throat, bottom budding, Dam blocks, electric block corners. This product is available in a large size straight or approximate bricks and special formats and shapes which are available for special machining processes. Fused Cast AZS are the most widely used materials both in glass contact and superstructure of glass melting furnaces.



Casting Types
When developing the production technology of fused cast AZS, Shixing has always taken great care to eliminate or control the dispersion of shrinkage cavities during solidification of the fused material, as this has a great influence on the behavior and resistance of the blocks against wear in operation. Shixing is able to manufacture AZS-41 blocks by different casting methods.

Fused Cast AZS-36# Block - The best Fused Cast AZS-36# Block from China Zhengzhou Shixing Refractory.

Fused Cast AZS-36# Block can provide improved service over AZS-33, which is a type of AZS fused cast refractory produced by Shixing having 36% ZrO₂ content.

Fused Cast AZS-36# Block have passed the ISO international certified, are made of high pure material, fired at high temperature by advanced technology, with the advantages of high strength, high compression resistance, good thermal shock resistance, good performance in high temperature, good thermal conductivity, good erosion resistance and so on. Widely be used for linings of furnace in industries.



Advantages:
1. Compact microstructure
2. Good erosion resistibility to molten glass
3. Good thermal shock resistibility
4. Barely rendering blister
Application
Fused Cast AZS-36# Block is only available for straight brick. Mainly used for side walls of flame furnaces with embedded melter bottoms, for total security with average pulls and campaign lengths, and superstructures, front wall, back wall, top crown in glass melting furnace.

Fused Cast AZS are the most widely used materials both in glass contact and superstructure of glass melting furnaces.



Casting Types When developing the production technology of fused cast AZS, Shixing has always taken great care to eliminate or control the dispersion of shrinkage cavities during solidification of the fused material, as this has a great influence on the behavior and resistance of the blocks against wear in operation. Shixing is able to manufacture AZS-36 blocks by different casting methods.
Physical and Chemical Specifications (JL-AZS36)

Fused Cast AZS-33# Block - The best Fused Cast AZS-33# Block from China Zhengzhou Shixing Refractory.

Fused Cast AZS-33# Block is the most commonly used type of AZS fused cast refractory produced by Shixing having 33% ZrO2 content. Fused cast AZS 33# block has dense micro structure which ensures its great resistance in glass liquid, thus you don’t have to worry about the solidification and other problems. It is widely applied to glass furnace for superstructure, working pool side wall, paving blocks, feeder channels, tank bottoms, C-shaped block and doghouse crown, etc.



Advantages:
1. Compact microstructure
2. Good erosion resistibility to molten glass
3. Good thermal shock resistibility, high compression resistance
4. Barely rendering blister
5. A variety of formats and shapes for furnace different working areas




Different casting methods can be adopted to produce various shapes and sizes for different areas of glass furnaces.

Casting Types
When developing the production technology of fused cast AZS, we have always taken great care to eliminate or control the dispersion of shrinkage cavities during solidification of the fused material, as this has a great influence on the behavior and resistance of the blocks against wear in operation. We are able to manufacture AZS-33 blocks by different casting methods.

Fused Cast AZS Block - The best Fused Cast AZS Block from China Zhengzhou Shi Xing Refractory.

AZS fused cast block is also called fused cast block which is abbreviated as AZS because it contains Al2O3－ZrO2－SiO2. Fused cast AZS block is made from pure alumina powder and Zircon sand (composed of 65% zirconia and 34% SiO2). After Alumina powder and zircon sand melting in electric furnace, they are cast into various molds and cool themselves down to become white solid. Because of the different content of Zirconia from 33%-41%, Jiulong Brand fused cast AZS blocks can be divided into three types AZS—33#, AZS—36# and AZS—41#. 



Physical and Chemical Specifications (JL-AZS33)
JL-AZS33 Description:
Fused cast AZS 33# block has dense micro structure which ensures its great resistance in glass liquid, thus you don’t have to worry about the solidification and other problems. It is widely applied to glass furnace for superstructure, working pool side wall, paving blocks, feeder channels, tank bottoms, C-shaped block and doghouse crown, etc.



Advantages:
1. Compact microstructure
2. Good erosion resistibility to molten glass
3. Good thermal shock resistibility, high compression resistance
4. Barely rendering blister
5. A variety of formats and shapes for furnace different working areas
Different casting methods can be adopted to produce various shapes and sizes for different areas of glass furnaces.Fused Cast AZS Block

Physical and Chemical Specifications (JL-AZS36)
Description:


Physical and Chemical Specifications (JL-AZS41)
Description: