A wide variety of azs brick refractory options are available to you, such as brick. Exceptionally for refractory materials the amount of the glassy phase in a azs material is important and appreciable. Jun 05, 20 pdf on jun 5, 20, roland heidrich published introduction to fusioncast refractories. Mar 08, 2016 demand for quality refractories in contact with glass to not alter critical properties of the glass by refractory defects and dissolved refractory components. Since the sidewalls and breast walls most commonly consist of fusedcast azs and the crown of silica, zircon is required as a buffer between the possible reaction of the azs and the silica. Azs brick for sale in rongsheng refractory is also called zirconiacorundum refractory brick which is a kind of white solid body that made from alumina powder and about 65% zro2 and 34% sio2 with zircon sand inside, and which is poured into mould after being melted in the electric melting furnace. Zb1681x has lower potential for contamination to molten glass with lower exudation. We deliver one of the industrys widest, deepest lines of solutions. Azs refractory of melting part and working part located below the metal line differ by the presence of the boundary layer, there is no interface layer in the azs taken from the melting part.
Global refractory solutions corporate headquarters. Azs refractory of melting part and working part located below the metal line differ by the presence of the boundary layer, there is no interface layer. Azs refractory meaning azs refractory refers a kind of zirconium corundum brick and is mostly applied in glass melting furnace. Quality, consistency and virtually zero lead time have been keystones to the longevity of our success. Minimize dust generation and avoid inhalation and contact with refractory. Very high zirconiacontent azs secondary raw material obtained from used fusedcast azs refractory linings of glass furnaces. Fused cast azs refractory materials refractories worldforum. Dec 01, 2015 corrosion rates of fc azs refractory were estimated as i 0. Section 6 accidental release measures section 7 handling and storage to ensure product quality, store material in a dry place. This superior erosion resistance makes it the ideal material for long run container production lines. There are mainly 7 types of zirconia refractories used in glass industry including fused cast azs block, fused cast high zirconia block, zircon brick, zircon mullite brick, azs ramming mass, rebound azs refractory and sintered azs. Thermal stresses are generated early in the solidification process by rapid cooling of the refractory surface as it contacts the initially cool mold and later in conjunction with the tetrago. China azs refractory brick, china azs refractory brick.
Average values of the density of electrofused azs refractories refractory bulk density of the refractory, tonsm3 nc rc fc azs 33 3. The oxidation level strongly influences compactness, blistering tendency, exudation, stoning and corrosion resistance. Azs fusedcast 2 azs 33% 3 azs 3341% 4 azs 41% 5 calsitra ms 1250 6 carath 1400lc 7 carath 1650ulc azs 8 carath 1650 lcsf 9 carath 1655lc 10 carath fl1 11 carath fl1404 12 carathplast 1650 azs evac evs 1 14 lw silica 15 porrath fl 2512 16 porrath fl 2608 17 porrath fl 2712 18 porrath fl 2809 19 porrath fl 2416 20. Zirconia content defines their corrosion resistance. Azs refractory refers a kind of zirconium corundum brick and is mostly applied in glass melting furnace. Bonded refractories alumina, magnesia, magnesia spinel, sillimanite, zircon, alumina zircon, silica.
Zb1691 the azs fused cast refractory class containing 35% zro2. Aluminazirconiasilica azs fusedcast refractories began to increase in popularity in glass furnace applications for the glass contact and. The new product, zb1681x is suitable for superstructure of glass melting furnace. Saintgobain sefpro sintered and electrofused products, founded in 1929, produces refractories for the glass industry. The main mineral constituents are zircon, corundum and glass phases.
Our extensive product range is manufactured inhouse. Plibrico company, llc technical data sheet plishot hymor cl. Azs brick, zirconia corundum refractory brick with 3345% zro2 content, uses industrial alumina powder and wellselected zircon sand as the raw materials. Study on fusedcast azs refractories for deployment in. Monolithic refractories sealingrepairing material, mortartamping material and castable refractories refractories refer to section 3.
A wide variety of fused cast azs refractories options are available to you, such as bending, cutting, and moulding. Find, read and cite all the research you need on researchgate. China azs refractory block used for glass furnace manufacturers and. They are also used as sidewall material in the combustion chamber as well as crown material especially with oxygen fired furnaces. Experimental procedure this research consisted in the preparation of samples produced with different raw materials, as alumina, mullite, bauxite, zirco. If one cord occupies 25 mm3, we can easily calculate that, after one year, there are 112. The images in figure 1 of corroded azs fused cast refractory lining are a revealing testament to the erosion of refractory linings during a glass furnace campaign. Container glass harbisonwalker international refractory. It has the lowest zro 2 concentration among azs refractories 34% zro 2, yet it offers excellent corrosion resistance to soda lime glass melts. Plicast hymor azs kk page 2 of 4 ingredients checked c. China azs refractory brick, china azs refractory brick suppliers and manufacturers directory source a large selection of azs refractory brick products at refractory bricks, azs brick,az factory from china. Azs refractory bricks for sale refractory material manufacturer. The refractory blocks usually are made of composite clays having alumina, zirconia, and silica azs.
Temperature measure ments are made at various points in the brick, and from the data. Specifications of azs brick company introduction zhengzhou zhengnai industry co. Throughout the solidification process, shrinkage void appears inside the block, and its. Aluminazirconiasilicate azs refractories in contact with molten glass form a viscous silicate layer adjacent to the refractory thus restricting contact, and therefore, increasing corrosion resistance. Azs brick is the key materials to be used for the important position in glass furnace. The need for information relative to the expansion of refractory materials, up to. Azs fused cast refractory is manufactured by electric melting and casting processes.
These observations indicate high chemical durability of the refractory material within aggressive environment of concentrated nitric acid under boiling conditions. Sefpro places particular emphasis on three fundamental properties of fused cast products which affect their use oxidation level of the melted liquid. Temperature of oc 230 1500 2000 2500 110 820 1090 70 linear change% per astm c1 ccs per astm c3 psi mpa cold mor per astm c3 psi mpa hot mor per astm c583 psi mpa 0. Zirconia refractories is widely used in the melter, superstructure, sidewall and throat of glass furnaces. Analysis of salvaged fusion cast azs refractory material 46. The coatings are characterized by the formation of fine dendritic zro2 grains and some porosity. A comparison of chemical interaction data clearly suggests that fc azs exhibits better chemical durability than azc refractory al 2 o 3 zro 2 cr 2 o 3, also used for similar purpose. The lithofacies structure is composed of corundum and zirconium plagioclase and glass phase. Industrial edition rhi bulletin 22014 rhi magnesita. Refractories for glass furnaces normally are limited to compositions based on a1 2 o 3, zro 2, and sio 2, with or without cr 2 o 3. Zro 2 93% al 2 o 3 1,5% sio 2 4% cao 0,1% na 2 o 0,3% valorzac valorzac is a secondary raw material, obtained from used fusedcast azs refractory.
Azs brickhigh quality azs refractory brick manufacturer rs. Jul 07, 2020 fused cast azs block is also called electro zircon corundum block, which is abbreviated as azs because it contains al2o3zro2sio2. And by bringing intensity, reliability, and passion to work every day, were able to provide superior value to our customers and their businesses. Fused cast aluminazirconiasilica azs ma terials are the preferred refractories for the furnace area in contact with the glass melt when melting. Made from er1195, or equivalent, with over 93% zro 2 content. Electrofused azs refractories for highcapacity glassfounding furnaces 305 table 2. It can endure high temperatures along with having a high resistance to corrosion. The optimal oxidation level depends on the melting process and proper control of the melting parameters within the furnace.
Azs fusedcast 2 azs 33% 3 azs 3341% 4 azs 41% 5 calsitra ms 1250 6 carath 1400lc 7 carath 1650ulc azs 8 carath 1650 lcsf 9. The azs fused cast refractory containing 33% zro2 with lower contents of na2o and glass phase compared with zb1681. Azs refractory brick is commonly known as white iron brick, also known as corundum oblique zircon brick. Electric fused cast refractories azs, alumina, high pure zirconia, etc. Therefore, most suitable for use in superstructures of melters, side walls of refiners, paving blocks, and. During hightemperature processing, the surfaces are melted and mixing occurs between the applied zirconia coating and the underlying refractory. Aug 17, 2016 monofrax cs3 is the most versatile and widely used of the three monofrax azs compositions. If the source is the superstructure then the alumina in the insitu defect is higher than in the glassy phase of the refractory. In the casting process, molten material is poured into the mould, and th occurs during annealing and e shrinkage of material solidification of the melt. Tzb is the industrys benchmark brand for zircon brick. The azs refractory blocks are made from molten material.
A fundamental approach has been taken, centered on the development of a three. Products specs zircon mullite brick mz20 zircon mullite brick mz30 bonded azs brick azs 30a bond azs brick azs 30b zirconia corund um brick za33. Evaluation of non crystalline phase in azs refractories by. Refractory solutions for glass harbisonwalker international. Masso and the refractory tests laboratory from german speciality glass producer schott. Xrd pattern of the corroded electrofused cast azs refractory. F used cast azs products, mainly in industrial alumina, zirconia, zro2 as raw material, through the refractory material of electric arc furnace melting, crystallization, casting, insulation, processing, production of the product. Fused cast azs refractory bricks also can be used in the metal smelting furnace and container for resisting slag erosion.
Rotary kiln refractory selections refractory manufacturer. The development of nondestructive inspection method for azs. Corrosion of azs refractories source of defects in. Ez cubed azs quikturn azs pc quikturn 60pc tertiary air duct seneca 60p brick rescocast 15gm rmax g qt precalciner ez cubed 3000 ez cubed azs quikturn azs pc quikturn 60pc quikturn azs g meal chutes ez cubed azs rescocast 15gm kiln hood quikturn 60g quikturn 60pc cooler bull nose quikturn 60pc quikturn 60z pc tertiary air duct quikturn 60g. Sintered azs brick is also called electrofusion and zirconium corundum brick, whose chemical composition is al2o3 zro2sio2. Aluminazirconiasilicate azs refractories in contact with molten glass form a viscous silicate layer adjacent to the refractory thus restricting contact, and. Refractory corrosion, molten glass, frit, frit furnace, frit furnace refractory. Pdf on jun 5, 20, roland heidrich published introduction to fusioncast refractories. Restoring value to refractory secondary raw materials.
Azs brick professional glass furnace refractory bricks. Azs refractory bricks for sale refractory material. Their microstructure mineral phases, grain size is of great interest since it heavily. The development of nondestructive inspection method for. Refel 1616ulx is an azs refractory with reduced zro2 content and an. In field trials on refractory expendables, it has been demonstrated that azlac 321 can extend the service life of the refractory component by as much as 400% when compared to standard bonded azs compositions. For almost 20 years, we are specialized in engineering and contracting refractory sets for glass furnaces. The group belongs to the innovative materials division of the saintgobain group. The company consists of plants, sales offices and research and development centers employing over 2200 people across four continents, with headquarters in le pontet, vaucluse, france. Forehearths can be either gas fired or electric melted, and some forehearths have the ability. Development of azs refractories for the glass industry. The main chemical composition is al2o3 5070%, zro2 2040%, and the rest is sio2. Thermal cycling studies indicate that fc azs retains structural integrity including compressive strength and density even up to 20 cycles.
The comprehensive knowledge of an industrial ceramics technician also includes heat treatment processes e. Limit installation method al 2 o 3 sio 2 gcm3 lbft3 mpa psi oc of. Pli,shot hymor cl azs kk alumina source enhancement super duty super duty mullite mullite mullite mullite 4% zr02 5% sic 10% sic 20% sic 30% sic. Azs refractory bricks have low potential for stoning, blistering and exudation of the matrix glass. This is because the indiffusion of the alkalis causes the dissolution of the alumina crystals into the glass matrix in the refractory. Azs brick should not be used in the position with vagaries of temperature among 9001160 degree. Pdf nitrogen bubbles from azs refractories fritz kramer. Our worldclass products perform to the highest degree. Azs refractory brick is a white solid formed by melting aluminum oxide powder and zirconia sand containing about 65% zirconia and 34% silica in an electric furnace and then cooling it in the model. The product is the key materials of glass and glass products kiln, in accordance with the casting method, can be divided into ordinary pt, tilt qx, zws quasi. Electrofused azs refractories for highcapacity glass.
Highdensity infrared surface treatment of refractories. Fused cast azs block is also called electro zircon corundum block, which is abbreviated as azs because it contains al2o3zro2sio2. The thermal expansion of refractories to 1,800 degrees c. Its focus is to select refractory grades with the lowest defect potential. Jun 04, 2020 azs aluminazirconiasilica azs is one of the most frequently utilized refractories in the production of commercial glass. Azs fused cast refractories are the most widely used materials in glass melting furnaces, frit kilns and occasionally some foundry plants.
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