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Glass Defects From Refractory

  • on glass

    which is a vitreous defect having a different composition and hence different physical and chemical properties from the base glass being manufactured. This surface cord is a glass enriched in alumina and/or onia by typically 2 to 6% compared to the base glass and originates from the dissolution of refractories into the glass being manufactured.

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  • Corrosion of AZS Refractories - Source of Defects in .

    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.

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  • Glass Property Measurement - glass-ts

    A range of compositional analyses are available for a range of materials, glass samples, defects, inclusions, refractories, dusts and other materials. Transmission and Absorbance Analysis of the tranmission and absorbance profile of a glass sample to determine UV/light protection, solar .

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  • CHARACTERIZATION AND TESTING OF REFRACTORIES FOR .

    Refractories performance affects the economics of industrial glass manufacture in two ways: by entering into the production cost and by affecting the quality of the glass through the introduction of defects. Refractories research at UMR has focused on thermochemistry, phase equilibria, corrosion, creep, thermal shock, mechanical properties and .

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  • SEFPRO | Glass Defects Analysis & Glass Furnace Repairs

    Glass defects' analysis, raw material and cullet analysis. Repair solutions Emergency stocks of refractory materials for repairs, dedicated people to operate hot or cold repairs on your glass furnace.

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  • Glass Defects Analyses | Glass Service

    Glass Defects Analyses; High Temperature Observation of Glass Melting Process; . GS offers analyses of defects in glass & bubble source studies, which include: Defect analysis – bubbles & stones, cords and others such as gall, knots, surface defects . Stone from fused cast AZS refractory.

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  • Glass defects analysis - ru.sefpro

    Glass defects have a major impact on glassmakers' production cost. When a glass quality crisis occurs, the glassmaker must quickly identify its origin and apply corrective measures. Analyzing the origin of defects requires a vast knowledge of both the various defects' types and refractory .

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  • Defects in specialty and container glasses - ScienceDirect

    68(1 J.F. Wosinski / Defects in specialty and container glasses defect from a barium-alumino-silicate glass. Alumina enrichment of the glass by an alumina refractory is the source. Figs. 23 and 24 show molybdenum defects in a borosilicate glass; the source is a molybdenum electrode.

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  • Refractory Materials: June 2015

    The interaction of glass melts and refractories in glass furnaces has a large impact on the resulting glass quality. The mostly applied type of refractory in the glass industry, in direct contact with the glass melt, is fused cast AZS.Due to the interaction of the glass melt with fused cast AZS, glass defects like stones, knots and bubbles can be generated.

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  • Glass Engineering - M Glass Factory Services

    refractories by utilizing its years of accumulated fused cast refractories technology. The ZB-X950 Series contains over 88% zirconia thereby achieving the highest quality without stone and blister defects in the molten glass. Therefore, this fused cast refractory is most suitable for

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  • Glass defects originating from glass melt/fused cast AZS .

    The interaction of glass melts and refractories in industrial glass melting tanks has a large impact on the resulting glass quality. The mostly applied type of refractory in the glass industry, in direct contact with the glass melt, is fused cast AZS (Alumina Zirconia silicate). Due to the interaction of the

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  • Refractories Unusual behaviour of - glass-international

    superstructure AZS refractory. If the source is the superstructure then the alumina in the in-situ defect is higher than in the glassy phase of the refractory. This is because the in-diffusion of the alkalis causes the dissolution of the alumina crystals into the glass matrix in the refractory. If it is glass-contact then

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  • SPECIAL REPORT/GLASS: Identifying Glass Defects

    Common glass defects include bubbles, stones, knots, cords and scratches. One unusual stone defect in a pattern glass was recently discovered, and a scrupulous methodology was necessary to investigate its source. Numerous plate glass samples with white-colored stone defects were received for analyses (see Figure 1).

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  • Services | Monofrax LLC

    The area inside a glass furnace with potential for defect generation from refractories is large (~ 3600 ft 2 for container furnaces ~ 14000 ft 2 for float furnaces). Batching errors, temperature generated devitrites, and mechanical finishing steps can also contribute to defect generation.

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  • Refractory Selection for the Container Glass Furnace .

    Container glass is a type of glass for the production of glass containers, such as bottles, jars, drinkware, and bowls. With the increasing of the demand for the container glass, the quality requirement for the container glass is higher too. Refractory is one of the most important factors that affect the quality of the container glass.

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  • IMI-NFG Course on Processing in Glass - Lehigh University

    IMI-NFG Course on Processing of Glass - Lecture 3: Basics of industrial glass melting furnaces [email protected] 4 Outline of this lecture 1. Glass melting furnaces Furnace design (focus on continuous melting tanks) Process steps Furnace operation 2. Heat transfer 3. Refractories

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  • High Temperature Refractory Coatings - aremco

    Aremco's refractory coatings offer the ultimate protection of high temperature components used in the processing of ceramics, glass, metals, and plastics. FEATURES • Ultra Hi-Temp Resistance • Non-Wetted by Molten Metals, Salts, Glass & Plastics • High Lubricity for Easy Part Release • Minimizes Cast Surface Defects

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  • Boundary Layers Refractory/Glass Melt and Glass Defects

    In this paper the formation of boundary layers and their behaviour regarding corrosion and glass defect potential of different refractory/glass melt combinations will be discussed. The reaction between refractories and glass melts is determined by the diffusion of the different ions from the glass melt into the refractory material and vice versa.

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  • GLASS MELTING FURNACE REFRACTORIES AND REFRACTORY .

    The refractory problems can cause glass defects dur-Journal of Chemical Technology and Metallurgy, 50, 4, 2015 406 ing the campaign. The defects which are determined by the refractory type and their location in furnace listed in Table 3. A troubleshooter should know the furnace opera-

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  • Characteristics of Refractories Applied in Glass Tanks

    low potential of a glass defect formation. High corrosion resistance, in turn, requires a possibly low solubility of the refractory material in glass melt which sometimes can result in a higher level of glass defects if particles of such a material appear there, e.g., due to, erosive wear. This relation is the only example for situations where

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  • Refractory Materials: June 2015

    The interaction of glass melts and refractories in glass furnaces has a large impact on the resulting glass quality. The mostly applied type of refractory in the glass industry, in direct contact with the glass melt, is fused cast AZS.Due to the interaction of the glass melt with fused cast AZS, glass defects like stones, knots and bubbles can be generated.

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  • REFRACTORIES HZFC: DEVELOPMENTS, refractories .

    68 glass machinery plants & accessories 2/2015 refractories REFRACTORIES All these conditions are the basis for a refractory having extremely low potential of defects cession: no alumina cords,

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  • Guide to Container Defects - Emhart Glass

    glass projecting upward from the inside edge of the finish. FLANGE A small ring of glass which is pressed out between the guide and neck ring. SEEDS Very small bubbles in the glass. SPLIT FINISH A finish which has a crack across the top surface–extends from the top of the finish down towards the neck. STONES Small pieces of refractory or .

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  • IMI-NFG Course on Processing in Glass - Lehigh University

    IMI-NFG Course on Processing of Glass - Lecture 3: Basics of industrial glass melting furnaces [email protected] 4 Outline of this lecture 1. Glass melting furnaces Furnace design (focus on continuous melting tanks) Process steps Furnace operation 2. Heat transfer 3. Refractories

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  • Glass production - Wikipedia

    Float glass is a sheet of glass made by floating molten glass on a bed of molten metal, typically tin, although lead and various low melting point alloys were used in the past. This method gives the sheet uniform thickness and very flat surfaces. Modern windows are made from float glass.

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  • Refractory Corrosion and Glass Defects _Zhengzhou Sunrise .

    The refractory materials used in glass furnaces are exposed to high temperature and mechanical corrosion during the operation, which results in corrosion of refractories and glass defects. Silica brick is a kind of acid refractory mainly made from tridymite, cristobalite and a small amount of residual quartz as well as glass phase.

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  • Refractory Brick for High Temperature Insulation and Glass .

    Compositions Markets served include: quartz and laser crystal growth, glass, refractory metals, carbon black and high temperature furnaces. Refractory Brick - Tongue and Groove. Zircoa's tongue and groove bricks are designed for the building of self-supporting structures.

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  • Characterization and testing of refractories for glass .

    Refractories performance affects the economics of industrial glass manufacture in two ways: by entering into the production cost and by affecting the quality of the glass through the introduction of defects.

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  • Technical Committees Committee | IC Glass

    TC11: Materials for Furnaces. TC11 discuses advanced refractory materials and worldwide industrial experience on glass melting furnaces. The material properties and .

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  • In Dust Glass Melt Furnaces | Refractory | Glasses

    IMI-NFG Course on Processing of Glass - Lecture 3: Basics of industrial glass melting furnaces [email protected] 3 Glass melting furnaces Furnace design (focus on continuous melting tanks) Process steps Furnace operation 2. Refractories IMI-NFG Course on Processing of Glass .

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