scholarly journals Analysis of batch asymmetry and batch line position for the decision support in the glass melting process

2021 ◽  
Author(s):  
Maciej Klemiato ◽  
Paweł Rotter ◽  
Andrzej Skowiniak
Keyword(s):  
Glass Furnace ◽  
Historical Data ◽  
Glass Melting ◽  
Vision System ◽  
Melting Process ◽  
Furnace Operation ◽  
Line Position ◽  
Asymmetry Coefficient ◽  
Process Data ◽  
Human Operators

AbstractThis paper presents the results of research on the analysis of historical data from a vision system developed by the authors, installed inside a glass furnace in one of the packaging glassworks. In particular, the authors focused on analysis of the batch blanket asymmetry coefficient and the batch line position in the furnace tank. The information obtained from the vision system allows to see phenomena occurring in the glass furnace that were previously difficult to notice. Based on this, recommendations for operators have been formulated to facilitate the glass melting process more efficiently. Based on historical process data from the SCADA production system, several models were developed that allow the batch line position in the glass furnace to be estimated. The best accuracy was achieved using the model based on neural networks. Such a model can be used to optimise furnace operation, which is at present based on the experience of human operators.

Study of Melting Ability of Granulated Glass Batch

2016 ◽  
Vol 690 ◽  
pp. 272-275
Author(s):  
Kanit Tapasa ◽  
Ekarat Meechoowas ◽  
Suwannee Thepbutdee ◽  
Amorntep Montreeuppathumb
Keyword(s):  
Glass Furnace ◽  
Waste Heat ◽  
Raw Materials ◽  
Glass Batch ◽  
Glass Melting ◽  
Glass Production ◽  
Melting Process ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Preheating Temperature

In the conventional soda-lime glass production, loose raw materials are normally mixed into a glass batch for melting. Dusting and segregation of the loose glass batch are always occurred during the melting process inside the glass furnace. Also, the loose glass batch has low thermal conductivity which limits the glass melting ability and pulling rate of the glass furnace. Granulation and preheating of glass raw materials have been proposed to solve the problems. In this study, the granulated soda-lime glass batch (SiO2 50% Na2CO3 22.5% CaCO3 12% NaAlSi3O8 9.5% BaCO3 2.5% ZnO 1.75% Sb2O3 1% and K2CO3 0.75% by weight) was prepared to study the melting ability in an electric furnace. The granulated batch was also preheated at 500-600°C before melting. The preheating temperature was matched to the temperature of flue gas at the bottom of the stack in the glass furnace. The purpose behind this was aiming to recover the waste heat from the furnace. The experiment exhibited the increased melting ability for the granulated-preheated glass batch

scholarly journals MATHEMATIC SIMULATION OF GLASS MELTING PROCESS IN GLASS PRODUCTION

2020 ◽  
Vol 2021 (1) ◽  
pp. 70-74
Author(s):  
Shuhrat Gulyamov ◽  
◽  
Azamat Rajabov ◽  
Utkir Kholmanov
Keyword(s):  
Automatic Control ◽  
Mathematical Description ◽  
Initial Conditions ◽  
Glass Melting ◽  
Glass Production ◽  
Melting Process ◽  
Turbulent Energy ◽  
Furnace Operation ◽  
Heat Fluxes ◽  
Systematic Analysis

A systematic analysis of the technological process of glass melting as an object of automatic control and management has been carried out. As an object of automatic control with distributed parameters, the mathematical description of the glassmaking furnace operation has been developed (considering the main phenomenological features of the technological mode of glassmaking).In this paper, a mathematical description of charge melting process, additional heating by electric current, bubbling, thermal conductivity and heat fluxes during the processing of molten glass have been generated. Initial conditions and simplifying assumptions have been derived. The model is based on the equations of continuity, momentum and energy, as well as kinetic turbulent energy, dissipation of kinetic turbulent energy. An experiment has been conducted on the proposed in order to check for its adequacy to real glass-making processes.

The Microstructure of Fused Cast AZS Materials before, during and after the Use for Glass Melting

2008 ◽  
Vol 39-40 ◽  
pp. 607-612
Author(s):  
Bernhard Fleischmann
Keyword(s):  
Glass Furnace ◽  
Glass Melting ◽  
Hot Spot ◽  
Float Glass ◽  
Vitreous Phase ◽  
Spot Area ◽  
Furnace Campaign ◽  
Three Phases

A part of a soldier block, placed in a float glass furnace near the hot spot area, was investigated to learn about the changes in the microstructure during the production of the block, during the use for glass melting and after the shut down of the furnace and the cooling of the block. Beside the three phases after the production (baddeleyite, corundum, vitreous phase) during use as a soldier block mullite and secondary corundum as well as secondary zirconia may occure. Cooling down the used block after the furnace campaign the beginning of the crystallisation of feldspars may be seen.

scholarly journals Study on the erosion of Mo/ZrO2 alloys in glass melting process

2020 ◽  
Vol 39 (1) ◽  
pp. 595-598
Author(s):  
Cui Chaopeng ◽  
Zhu Xiangwei ◽  
Li Qiang ◽  
Zhang Min ◽  
Zhu Guangping
Keyword(s):  
Grain Size ◽  
Corrosion Resistance ◽  
Powder Metallurgy ◽  
Hydrothermal Synthesis ◽  
Grain Boundaries ◽  
Electrode Material ◽  
Glass Melting ◽  
Melting Process ◽  
Fine Grain ◽  
Conventional Electrode

AbstractThe Mo/ZrO2 electrode was prepared by combining hydrothermal synthesis with powder metallurgy, and this new electrode material has a totally different microstructure from the conventional electrode. The grain size of the new electrode was fine, and the size of ZrO2 in the alloy reached 200 nm. According to the results, the Mo–ZrO2 electrode has better performance, because the erosion occurs along the grain boundaries. Meanwhile, the new electrode, based on its fine grain, can effectively improve the corrosion resistance of the electrode.

Cold Crucible Vitrification of NPP Operational Waste

2002 ◽  
Vol 757 ◽  
Author(s):  
Feodor A. Lifanov ◽  
Michael I. Ojovan ◽  
Sergey V. Stefanovsky ◽  
Rudolf Burcl
Keyword(s):  
Radioactive Waste ◽  
Nuclear Power ◽  
Power Plants ◽  
Glass Melting ◽  
Liquid Radioactive Waste ◽  
Specific Radioactivity ◽  
Melting Process ◽  
Specific Power ◽  
Cold Crucible ◽  
Minimal Impact

ABSTRACTOperational radioactive waste is generated during routine operation of nuclear power plants (NPP). This waste must be solidified in order to ensure safe conditions of storage and disposal. Vitrification of NPP operational waste is a relative new solidification option being developed for last years. The vitrification technology comprises a few stages, starting with evaporation of excess water from liquid radioactive waste, followed by batch preparation, glass melting, and ending with vitrified waste blocks and some relative small amounts of secondary waste. Application of induction high frequency cold crucible type melters facilitates the melting process and significantly reduces the generation of secondary waste. Two types of glasses were designed in order to vitrify operational waste depending on the reactor type at the NPP. For the NPP with RBMK-type reactors the glass 16.2Na2O 0.5K2O 15.5CaO 2.5 Al2O3 1.7Fe2O3 7.5B2O3 48.2SiO2 1.1 Na2SO4 1.2NaCl (5.7 others) was produced. For NPP with WWER reactors the glass 24.0Na2O 1.9K2O 6.2CaO 4.3Al2O3 1.8Fe2O3 9.0B2O3 46.8SiO2 0.8Na2SO4 0.9NaCl (4.3 others) was produced. The melting temperatures of both glass formulations were 1200–1250 C, specific power consumption was 5.2 ± 0.8 kW h/kg, 137Cs loss was within the range 3 - 4 %. The specific radioactivity of glass reached 7.0 MBq/kg. Glass blocks obtained were studied both in laboratory and field conditions. Long-term studies revealed that vitrified NPP operational waste has the minimal impact onto environment. Since the glass has excellent resistance to corrosion it gives the basic possibility of maximal simplification of engineered barrier systems in a disposal facility. The simplest disposal option for vitrified NPP waste is to locate the packages directly into earthen trenches provided the host rock has the necessary sorption and confinement properties.

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