Apr, 2006 this research was conducted to develop new formulations of azs aluminazirconiasilica refractories with different amounts of zro2 with the purpose of improving properties and the work conditions in the glass melting furnaces and, at the same time, lower the costs this type of refractories. Corrosion of azs refractories source of defects in. The development of nondestructive inspection method for. Technology of refractory materials and heat insulating. Kt refractories distributes azs bricks, zirconia bricks, zircon mullite bricks, and other refractory bricks of the best quality at the most competitive prices worldwide. Call 18773652995 to order azs bricks, zirconia bricks, zircon mullite bricks, and other refractory bricks, and our fast, responsive customer service and reliable delivery service will save you time and money. Their types are defined according to the zro 2 content and they are mainly composed of 49%al 2 o 3, 32. The quality of fused cast azs can affect the quality and production of glass and the service life of the glass furnaces.
A fundamental approach has been taken, centered on the development of a three. Refractories because of their high heat resistance, ceramic materials are used as refractories. Harbisonwalker international hwi provides the largest refractory manufacturing capacity to the glass industry in north america. Infact,theelaborationconsistsincooling from 2400 c to room temperature a material which solidi. This disambiguation page lists articles associated with the title azs. Apart from these we can classify refractories into few more. The formation of the microstructure during production of the fused cast azs blocks can be illustrated by phase diagrams and with the help of an ice block. Materials, equipment, and personnel are qualified by the methods described, and applied. Course content abstract refractories are heat resistant materials used in almost all processes involving high temperatures andor corrosive environment.
Comparison of azs made with different manufacturing processes. As the pioneer of monolithic refractories, plibrico japan has since been engaged in the. We want to sell the best quality high temperature materials needed by our customers at the best price they can get to allow them to be competitive in their product area, product material,tungsten and molybdenum, tungsten and molybdenum products, steelmaking, steelmaking products, carbon felt and graphite felt,carbon felt and graphite felt. This industry profile of the refractory manufacturing industry provides information to support the regulation.
The products are manufactured in wide variety of shapes and sizes and special requirements can be accomodated too this insert is grinded and assembled by refmon. Ceramic refractories, azs, ceramic, azs refractory. Azs fused cast refractory is manufactured by electric melting and casting processes. The currently available azs refractories enable the glass maker to. These are typically used to insulate and protect industrial furnaces and vessels due to their excellent resistance to heat, chemical attack and. How to classify refractory materials the best method to classify the refractory materials is on the basis of their chemical behavior, i. Refractory ceramics are insulating materials and are designed to withstand high stresses and temperatures and must also resist the effects of molten metals, abrasive particles and hot gases. Published on february 23, 2016 february 23, 2016 11 likes 6 comments. The refractory compositions consist essentially of a 4085 wt. Refractories books pdf this updated reprint provides uptodate information on refractories. A refractory is a material that retains its shape and chemical identity when subjected to high temperatures and is used in applications that require extreme resistance to heat. Azs refractories have three microstruc tural components. The glass melter for this process will consist of a refractory lined tank enclosed in a watercooled, steel vessel and fed by an aqueous slurry of glass frit plus radioactive waste. An increase in bulk density of a given refractory increases its volume stability, heat capacity and resistance to slag.
Electrofused azs refractories for highcapacity glass. The feasibility of pieces made out of sintered materials is a complex issue which depends on the interaction between several parameters, such as the type of material, the type of manufacturing process, the complexity of the shape, the dimensions of the pieces and the number of pieces to be made. Refractory brick, or fire brick as it is often called, can withstand temperatures as high as 4,000 f and is commonly found in furnaces, fireplaces or exhaust stacks. Fused cast high zirconia bricks are made of artificial synthesis high purity raw materials through special casting process. Fused azs grain refractory compositions suitable for making ceramically or chemically bonded refractory articles, and the articles so made, are disclosed. The bulk density is useful property of refractories, which is the amount of refractory material within a volume kgm3. We can special order depths greater than 12 inches. Commercial azs aluminazirconiasilica refractories are a good alternative in refractory materials for the glass industry because they can support the aggressive conditions during liquid processing of glass. Fused cast azs has no open porosity but there are some closed voids and pores which arise from the manufacturing process.
Explosive spalling of low cement castable refractories a. As an aid to understanding the melting process and scaling data. Refractory solutions for glass harbisonwalker international. Prerequisites there are no prerequisites set for the studies of this subject. The main products of sunrise include fused cast azs block, fused cast alumina block, mullite brick, zircon brick, alumina bubble brick, sillimanite brick, corundum brick, low porosity fireclay brick, high alumina brick, all kinds of glass furnace ramming masses, etc. Fused cast azs 33 block has dense micro structure which ensures its great resistance in glass liquid, thus it is widely applied to glass furnace for superstructure, paving blocks, etc. The azs family of shapes consists of end pieces and an 18 wide x 12 to 22 middle channel section with 2 joints. For more information on thermbond refractory solutions installation guides, please contact us at 561 3309300. Mechanical behavior characterization of high zirconia. The fused cast aluminazirconiasilica azs refractory is an indispensable material for state of the art glass melting furnaces. Refractories school of materials science and engineering. Cast azs made with different manufacturing processes.
Glass furnaces suffer permanent infiltrations of the alkali compounds, vapours and liquid. Jun 26, 2015 fused cast azs corrosion is a more potent and longterm source of defects. This paper highlights relationship between the composition of defects presented at tableware glass products and a glass phase of the alumina zirconia silicate azs refractory material. It also describes the structure of the heatinsulating and refractory materials used to line such furnaces. 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. Requirements are formulated for the quality of electrofused aluminazirconiasilica azs refractories used in high capacity glassfounding furnaces.
The chemical composition of fused cast azs is one of the key factors that determine the crystal structure and the. If an internal link led you here, you may wish to change the link to point directly to the intended article. University of missourirolla, department of ceramic engineering, rolla, missouri 654090330, usa glasses, natetraborate and b 2 o 3 predominate. Pdf fused cast refractories for high quality glasses. Technical materials mission is simple but not easy.
Let reis refractory experts provide technical advice and assistance with any of your flux selection, refractory product, or refractory service requirements. However, another problem encountered in glass industry is contamination by refractory material that fall into the molten glass, which can produce a series of defects in the final product. You are correct about the uses of refractory brick in high temperature applications. Our refractory products provide a competitive edge. Direct attack occurs by condensation of the hot face of the refractory. Sunrise is a refractory material supplier from china.
It is widely applied to glass furnace for superstructure, working pool side wall, paving blocks, feeder channels, tank bottoms, cshaped block and doghouse crown,etc. Since calcium aluminate bonded low cement castable refractories were first developed, explosive spalling during dryout has been an ongoing problem for refractory manufacturers, installers, the end user and the service company hired to perform the initial dryout. This book encompasses the entire range of industrial refractory materials and forms. You have received study materials for extramural studies for the subject refractory materials and heat insulating materials of 2nd semester of following masters study field. Over 85 years of research and development in the glass market have enabled us to pioneer innovative glass solutions. When the azs lining interacts with molten glass, there is typically a corrosion reaction layer at glass contact that remains attached to the lining. Jul 16, 2015 fused cast azs block is the essential refractory material used in the demanding areas of glass furnaces. These refractory standards help materials science laboratories, material processing companies, product manufacturers, and other producers and users of such materials and products in their proper fabrication and treatment procedures to ensure good quality and workmanship towards safe utilization. He songshen follow engineer manager at zhengzhou sunrise refractory co. Fluxes high temperature products refractory engineers.
China electrofused cast azs refractory for glass furnaces, find details about china azs refractory, fused cast azs refractory from electrofused cast azs refractory for glass furnaces zhengzhou dongfang ancai refractory co. Dec 18, 20 this article describes the parameters for the efficient operation of modern glassfounding furnaces designed to produce commercial glass. Pdf fusedcast refractories for high quality glasses. Development of azs refractories for the glass industry. Fused cast azs refractoryrefractory brick refractory furnace. Accordingly we have three categories of refractory materials. Fused cast high zirconia bricks description the series of tyz are fused cast high zirconia refractories which are specially designed refractory for glass furnace application. Glass melt contact refractory corrosion can lessen with time due to boundary layer formation and the effect of external cooling at the metal line. 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.
Flux is used in foundries for removing impurities from molten nonferrous metals. China electrofused cast azs refractory for glass furnaces. Api 936, refractory installation quality control inspection and testing monolithic refractory linings and materials, provides installation quality control guidelines for monolithic refractory linings and may be used to supplement owner specifications. The azs style glass tank is designed primarily for the glass artist who desires 400600800 lb. Standard test method for testing of glass exudation from azs.