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glass defects from refractory

Characterization and identification of local defects in glass

glass. The crystalline defects may be caused by the crys-tallization of the glass itself or by crystal formation from reactions with refractory material or contamination, or from undissolved raw materials, etc. Metallic inclusions originate either from metals used in the melting units (e.g.,electrode materials),from refractory Address for reprints:

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(PDF) Glass melting furnace refractories and refractory ...

Refractory related glass defects. Glass defects occur in many different forms while . the defect sources exhibit a considerable diversity. For . instance, two defects may have the same structure and .

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Fused Cast AZS Exudation And Glass Defects -

Fused cast AZS block is the most widely used refractory material in the demanding areas. It is thought as the leading cause of knot and cord defects. Fused cast AZS exudation in glass contact is the main cause of impaired performance of AZS under particular...

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Glass Defects Identification Using a Mass

Bubbles from refractory materials are generated by the air released from the pores during the refractory dissolution. Pores, open or closed ones, can be found even in high‐quality refractories. 78th Conference on Glass Problems: Ceramic Engineering and Science Proceedings, Issue 1, Volume 39

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SPECIAL REPORT/GLASS: Identifying Glass Defects

2010-9-1  Glass defects are typically unavoidable, but their occurrence must be minimized during the production of high-quality glasses. Common glass defects include bubbles, stones, knots, cords and cat scratches. One unusual stone defect in a pattern glass was recently discovered, and a scrupulous methodology was necessary to investigate its source.

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Glass defects and contamination Glass property ...

Laboratory analysis includes composition analysis of inclusions, stone, cord, knot, bubbles and blisters to surface contamination, delamination, misting, bloom and the assessment of forming defects and quality concerns in finished products. As experts in glass we can simply report upon simple composition and causes of defects or provide technical support to provide solutions and quickly ...

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Glass container defects Causes remedies

recognize the defects and understand what remedies to use in order to eliminate them. When a glass container fails on the customer’s filling line because of a manufacturing defect, the reputation of glass suffers, which results in a loss of customer goodwill. Remedies offered hopefully give you a basic understanding of defects and their causes.

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Common causes of refractory failure Engineer Live

2021-2-28  Refractory materials and lining reliability are key to increasing the performance of fired heaters, incinerators, kilns and reactors across a range of industries. Not only can the right refractory lining optimise production yield and minimise energy costs, but it can also enable consistent high performance of a furnace over the lifecycle of the ...

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Refractory Corrosion and Glass Defects _Zhengzhou

2020-10-30  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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Reduction of solid defects in glass due to refractory ...

In production of flat glass, it is known that the corrosion of silica refractory results in defects in the glass. In particular, the action of alkali vapors from the molten glass upon silica refractories lining selected walls and the roof structure of a melting and refining furnace corrode the silica refractory. The product of

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Studying Bubble Glass Defects that are Caused by ...

Studying Bubble Glass Defects that are Caused by Refractory Materials. Jiri Ullrich. Search for more papers by this author. Erik Muijsenberg. Search for more papers by this author. Jiri Ullrich. Search for more papers by this author. Erik Muijsenberg. Search for more papers by this author.

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Fused Cast AZS Exudation And Glass Defects -

Fused cast AZS block is the most widely used refractory material in the demanding areas. It is thought as the leading cause of knot and cord defects. Fused cast AZS exudation in glass contact is the main cause of impaired performance of AZS under particular...

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OF DEFECTS RELATED TO THE CORROSION THE

2016-3-12  Original papers ORIGIN OF DEFECTS RELATED TO THE CORROSION OF THE REFRACTORIES IN LEAD CRYSTAL GLASS JEAN _ LOUIS HEITZ CRITT Materiaux LNE Est. 67305 SCHILTIGHEIM.France Submitted Jute 24, 1999; accepted July 23, 1999, This paper reports mechanisms of corrosion of the refractories used in industrial melting of lead crystal glass hollowware, and some chosen examples of defects

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Defects Refractory Technology Training 2017 - Glass Service

2017-5-10  Glass Defects, Refractory Technology Training 4 – 8 September 2017 │ Lyon Glass Service (GS) FlammaTec (FT) F.I.C. UK (FIC) GEM Projects (GEM) Vidrio Engineering (VE) Comercial Quimica Masso (MASSO) A. AGENDA 4 DAYS TRAINING 1. GLASS MELTING TECHNOLOGY [MONDAY 4TH SEPTEMBER] GEM, GS ...

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Glass Defects glassonweb

2021-2-26  Viprotron Appoints the Glass Machinery Company as Sole UK Distributor AZS fused-cast refractory: different oxidizing methods and their impact on refractory behavior. Dr. Schenk’s focus at Glasstec 2008 on solar glass inspection and enhanced defect classification for float glass

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GLASS DEFECTS - GBV

2011-4-21  4.4 Inhomogeneities in the glass melt 446 4.4.1 Definition of the term "glass homogeneity" 446 4.4.2 Batch homogeneity 447 4.4.3 Furnace atmosphere as a cause of cords 448 4.4.4 Glass evaporation as a possible source of cords 450 4.4.5 Cullet behaviour in the glass melt 451 4.4.6 Refractory dissolution and tank wall corrosion 451

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SPECIAL REPORT/GLASS: Identifying Glass Defects

2010-9-1  Glass defects are typically unavoidable, but their occurrence must be minimized during the production of high-quality glasses. Common glass defects include bubbles, stones, knots, cords and cat scratches. One unusual stone defect in a pattern glass was recently discovered, and a scrupulous methodology was necessary to investigate its source.

More

Common causes of refractory failure Engineer Live

2021-2-28  Dissimilar refractory materials adjacently located are common, particularly surrounding openings such as doors (fibre and brick), peep sights (IFB, castable, fibre modules), burner blocks and pressure relief doors. Because dissimilar materials have different refractory properties at elevated temperatures, this makes a homogenous design difficult.

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Defects Refractory Technology Training 2017 - Glass Service

2017-5-10  Glass Defects, Refractory Technology Training 4 – 8 September 2017 │ Lyon Glass Service (GS) FlammaTec (FT) F.I.C. UK (FIC) GEM Projects (GEM) Vidrio Engineering (VE) Comercial Quimica Masso (MASSO) A. AGENDA 4 DAYS TRAINING 1. GLASS MELTING TECHNOLOGY [MONDAY 4TH SEPTEMBER] GEM, GS ...

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Fused Cast AZS Exudation And Glass Defects -

Fused cast AZS block is the most widely used refractory material in the demanding areas. It is thought as the leading cause of knot and cord defects. Fused cast AZS exudation in glass contact is the main cause of impaired performance of AZS under particular...

More

Reduction of solid defects in glass due to refractory ...

In production of flat glass, it is known that the corrosion of silica refractory results in defects in the glass. In particular, the action of alkali vapors from the molten glass upon silica refractories lining selected walls and the roof structure of a melting and refining furnace corrode the silica refractory. The product of

More

Fused Cast AZS Block and Glass Defects - Refractory ...

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 DEFECTS - GBV

2011-4-21  4.4 Inhomogeneities in the glass melt 446 4.4.1 Definition of the term "glass homogeneity" 446 4.4.2 Batch homogeneity 447 4.4.3 Furnace atmosphere as a cause of cords 448 4.4.4 Glass evaporation as a possible source of cords 450 4.4.5 Cullet behaviour in the glass melt 451 4.4.6 Refractory dissolution and tank wall corrosion 451

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Glass Defects Analyses Glass Service

2021-3-1  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; Bubble source identification procedure; Classification of the sources according to mechanism of bubble generation

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Defects training success Glass Worldwide Magazine

2021-2-25  Glass Service and CQ Masso partnered with Sisecam last November to organise a glass defects and refractory training day for attendees at the Sisecam International Glass Conference in Istanbul. The expert training session was delivered by Martina Jezikova (pictured), Filip Janos and Jerome Canaguier, focusing on the analysis and possible sources ...

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Common causes of refractory failure Engineer Live

2021-2-28  Dissimilar refractory materials adjacently located are common, particularly surrounding openings such as doors (fibre and brick), peep sights (IFB, castable, fibre modules), burner blocks and pressure relief doors. Because dissimilar materials have different refractory properties at elevated temperatures, this makes a homogenous design difficult.

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State-of-the-Art Refractory Linings for Float Glass Furnaces

refractory lining are less severe. However, the requirements for a low glass defect potential are very high and components from the re-fractory lining should not generate any glass defects. Established grades for this applica-tion consist of α/β- and β-alumina. The near absence of a glassy phase in both types of alumina refractories provides ...

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Refractory Materials: Fused Cast AZS Exudation And

2020-7-16  The main crystal phase of Fused cast AZS consists of corundum, baddeleyite and glass phase. The glass phase can reduce the expansion or shrinkage of ZrO2 within the above temperature range and prevent cracking. However, the glass phase is easy to be corroded and cause corrosion of the fused cast AZS and glass defects.

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