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 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
Dimensions and External Defects of Refractories - Test Method - BS 1902-3.19:1996, ISO 12678-1:1996
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 .
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...
Refractories and Glass Defects - Ceramic Industry. Jun 01, 2005· A recent study of post-campaign AZS refractory blocks from three types of glass melting furnaces is providing a better understanding of the link between AZS refractory corrosion and glass defects.
Glass Service (GS) and CQ Massó partnered with Şişecam last November to organise a glass defects and refractory training day for attendees at the Şişecam International Glass Conference in Istanbul.. The main conference was attended by 500 professionals from all over the world, interested in learning more about sustainable glass production.
239000006060 molten glasses Substances 0.000 claims abstract description 23 Method for identifying glass defect source, fusion cast refractory and glass melting furnace using it
HOW TO REDUCE GLASS DEFECTS GENERATED BY FUSED CAST AZS REFRACTORIES Published on July 12, 2019 July 12, 2019 • 94 Likes • 1 Comments
smooth and minor defects are repaired between runs. The one-inch thick glass charges saw a reduction in thickness by a factor of about 0.6 and very little reduction in lateral dimensions. The difference in shrinkage between the glass and the refractory on cooling is approximately 0.2% with the glass shrinking more than the refractory.
Refractory related glass defects. Glass defects occur in many different forms while the defect sources exhibit a considerable diversity. For example, two defects may have the same structure and character but an origin which comes from different sources and driven by different mechanisms.
01-09-2010· 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 scratches. One unusual stone defect in a pattern glass was recently discovered, and a scrupulous methodology was necessary to investigate its source.
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.
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.
It is only a short-term cause of glass defects. Fused cast AZS exudation from a glass contact surface is not very visible than that in the superstructure. In the glass furnaces, a portion of the glass phase of fused cast AZS block exudes onto the superstructure surface during furnace heat-up, until the furnace has achieved stable temperature profile.
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 ...
GLASS DEFECTS AND THE POSSIBLE SOURCES Solid defect analysis and possible sources (Martina Jezikova - GS) - How are solid defects analysed - Which different sources can create solid defects and how they appear in the final product Questions/ Answers 12:00 – 13:00 Launch 13:00-14.45 REFRACTORY DEFECTS, QUALITY CONTROL AND NEW POSSIBILITIES
Causes of stone defects in refractories in glass kilns 1. Improper use of refractories: the selection of refractories should be based on the melting temperature, glass composition, and the .
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 ...
01-03-1986· Examples of defects from raw material, refractory, devitrification and miscellaneous sources will be presented. Glass melting, liquidus determination techniques, and glass-refractory corrosion testing methods can all be utilized to better define defect sources. Correlations between these laboratory tests and actual stone defects will be made. 1.
glass defects from refractory - afropulseentcoza. Refractory materials for glass furnaces shall be selected and formulated according to the operating environment (temperature, atmosphere, composition and status of raw materials, fuel, etc) of the furnace and the cause of damage of the ref. Boundary Layers Refractory/Glass Melt and Glass Defects
Dimensions and External Defects of Refractories - Test Method - BS 1902-3.19:1996, ISO 12678-1:1996
The present invention provides a method for identifying a glass defect source, whereby a glass defect source can directly be identified without using a mathematical simulation. The method for identifying a glass defect source, which comprises a step of constructing a glass melting furnace by using, as lining furnace material, a fusion cast refractory containing at least one tracer component ...
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 .
Solid glass defects analyses Field of interest cords clear knots metallic inclusions surface defects knots with crystals secondary stones cords with crystals ... Zirconia-silicate (Zircon) refractories or cements - in alkali glasses in the low temperature region Zircon only dissolves – only melted-off grains are released from the refractory
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...
26-01-2010· Defects in the refractory lining or moisture-laden areas of insulation will therefore affect the exterior surface temperature uniformity. The usual approach to this kind of inspection would be to thermally map the exterior surfaces and use this as a baseline for subsequent surveys whereby deterioration may be monitored over time through comparison.
Request PDF | On Mar 1, 2016, P. Šimurka published Analysis of glass defect compositions from AZS refractory | Find, read and cite all the research you need on ResearchGate
Additional Physical Format: Online version: Begley, Edward R. Guide to refractory and glass reactions. Boston, Mass., Cahners Book Division [1970]
The present invention provides a method for identifying a glass defect source, whereby a glass defect source can directly be identified without using a mathematical simulation. The method for identifying a glass defect source, which comprises a step of constructing a glass melting furnace by using, as lining furnace material, a fusion cast refractory containing at least one tracer component ...
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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