The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform

F. Puccioni - One of the best experts on this subject based on the ideXlab platform.

  • microwave sensor for Molten Glass level measurement
    Sensors and Actuators A-physical, 2014
    Co-Authors: Massimiliano Pieraccini, Filippo Parrini, G. Macaluso, A. Spinetti, Daniele Mecatti, F. Puccioni
    Abstract:

    Abstract Measurement of Molten Glass level in Glass furnaces is a key issue for the control of the production process. Nowadays several different technologies shall be used for this purpose, with their advantages and drawbacks. In this paper a novel level sensor is proposed, it is based on radar interferometry technique, and it is designed to provide high accuracy measurements, high reliability and a very low maintenance.

  • Microwave sensor for Molten Glass level measurement
    Sensors and Actuators A: Physical, 2014
    Co-Authors: Massimiliano Pieraccini, Filippo Parrini, G. Macaluso, A. Spinetti, Devis Dei, Daniele Mecatti, F. Puccioni
    Abstract:

    Measurement of Molten Glass level in Glass furnaces is a key issue for the control of the production process. Nowadays several different technologies shall be used for this purpose, with their advantages and drawbacks. In this paper a novel level sensor is proposed, it is based on radar interferometry technique, and it is designed to provide high accuracy measurements, high reliability and a very low maintenance. © 2014 Elsevier B.V. All rights reserved.

Himansu Sekhar Tripathi - One of the best experts on this subject based on the ideXlab platform.

  • hot corrosion behavior of al2o3 cr2o3 refractory by Molten Glass at 1200 c under static condition
    Corrosion Science, 2016
    Co-Authors: Mithun Nath, Arup Ghosh, Himansu Sekhar Tripathi
    Abstract:

    Abstract Hot corrosion behavior of Al 2 O 3 –Cr 2 O 3 refractory by Molten Glass at 1200 °C under static condition was monitored. Glass-refractory interface was investigated by XRD, SEM and EDX analysis. After 36 h of testing, no visible change was observed, but SEM analysis revealed a corroded region of 315 μm. Corrosion occurs via dissolution of Al 2 O 3 followed by mass exchange and formation of Fe 2 O 3 –Cr 2 O 3 solid solution, which acts as a barrier to the Molten Glass. However, the Cr 2 O 3 fractions of the refractory remained uncorroded.

  • Hot corrosion behavior of Al2O3–Cr2O3 refractory by Molten Glass at 1200 °C under static condition
    Corrosion Science, 2016
    Co-Authors: Mithun Nath, Arup Ghosh, Himansu Sekhar Tripathi
    Abstract:

    Abstract Hot corrosion behavior of Al 2 O 3 –Cr 2 O 3 refractory by Molten Glass at 1200 °C under static condition was monitored. Glass-refractory interface was investigated by XRD, SEM and EDX analysis. After 36 h of testing, no visible change was observed, but SEM analysis revealed a corroded region of 315 μm. Corrosion occurs via dissolution of Al 2 O 3 followed by mass exchange and formation of Fe 2 O 3 –Cr 2 O 3 solid solution, which acts as a barrier to the Molten Glass. However, the Cr 2 O 3 fractions of the refractory remained uncorroded.

Massimiliano Pieraccini - One of the best experts on this subject based on the ideXlab platform.

  • microwave sensor for Molten Glass level measurement
    Sensors and Actuators A-physical, 2014
    Co-Authors: Massimiliano Pieraccini, Filippo Parrini, G. Macaluso, A. Spinetti, Daniele Mecatti, F. Puccioni
    Abstract:

    Abstract Measurement of Molten Glass level in Glass furnaces is a key issue for the control of the production process. Nowadays several different technologies shall be used for this purpose, with their advantages and drawbacks. In this paper a novel level sensor is proposed, it is based on radar interferometry technique, and it is designed to provide high accuracy measurements, high reliability and a very low maintenance.

  • Microwave sensor for Molten Glass level measurement
    Sensors and Actuators A: Physical, 2014
    Co-Authors: Massimiliano Pieraccini, Filippo Parrini, G. Macaluso, A. Spinetti, Devis Dei, Daniele Mecatti, F. Puccioni
    Abstract:

    Measurement of Molten Glass level in Glass furnaces is a key issue for the control of the production process. Nowadays several different technologies shall be used for this purpose, with their advantages and drawbacks. In this paper a novel level sensor is proposed, it is based on radar interferometry technique, and it is designed to provide high accuracy measurements, high reliability and a very low maintenance. © 2014 Elsevier B.V. All rights reserved.

Franck Pigeonneau - One of the best experts on this subject based on the ideXlab platform.

  • Mechanism of mass transfer between a bubble initially composed of oxygen and Molten Glass
    International Journal of Heat and Mass Transfer, 2020
    Co-Authors: Franck Pigeonneau
    Abstract:

    International audienceThe bubble removal from Molten Glass is an important problem in Glass melting process. In this paper, the mass transfer undergone by a bubble rising in Molten Glass is studied, the multicomponent feature being taken into account. In order to identify the time scaling of the bubble shrinkage, a careful dimension analysis is performed. A characteristic time to describe the mass transfer for each gaseous species in a bubble is introduced with an alternative expression of the permeability. This new permeability has the dimension of a diffusion coefficient, which is useful to compare to other transport phenomena. From the physical data known for soda-lime-silica Glasses, a fast equilibrium state of water between a bubble and Molten Glass is determined. The opposite situation is observed for nitrogen. Experimental results giving the bubble size versus time with a dimensionless form leads to a good match at short time whatever the Glass nature and the temperature. Finally, a simple equation to determine bubble size as a function of time is given, based on the dimension analysis previously established

  • Stability of vertical films of Molten Glass due to evaporation
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2012
    Co-Authors: Franck Pigeonneau, Helena Kocarkova, Florence Rouyer
    Abstract:

    Abstract First, we report observations achieved on a gravitationally driven film drainage with Molten Glass pointing out a stabilizing effect when temperature is larger than 1250 °C. A model to describe the change of surface tension with the film thickness due to the evaporation of oxide species is proposed. A lubrication model is derived taking into account the gradient of surface tension. The final system of equations describing the mass and the momentum conservations is numerically solved by an implicit time solver using a finite difference method at a second order scheme in time and space. The numerical procedure is applied to study a film drainage of Molten soda–lime–silica Glass. The effect of the surface tension gradient is investigated pointing out that with an increase of 0.5% of the surface tension over the spread of the film which is order of few centimeters, the liquid film reaches an equilibrium thickness in agreement with previous experimental work.

  • Mechanism of mass transfer between a bubble initially composed of oxygen and Molten Glass
    International Journal of Heat and Mass Transfer, 2011
    Co-Authors: Franck Pigeonneau
    Abstract:

    Abstract The bubble removal from Molten Glass is an important problem in Glass melting process. In this paper, the mass transfer undergone by a bubble rising in Molten Glass is studied, the multicomponent feature being taken into account. In order to identify the time scaling of the bubble shrinkage, a careful dimension analysis is performed. A characteristic time to describe the mass transfer for each gaseous species in a bubble is introduced with an alternative expression of the permeability. This new permeability has the dimension of a diffusion coefficient, which is useful to compare to other transport phenomena. From the physical data known for soda–lime–silica Glasses, a fast equilibrium state of water between a bubble and Molten Glass is determined. The opposite situation is observed for nitrogen. Experimental results giving the bubble size versus time with a dimensionless form leads to a good match at short time whatever the Glass nature and the temperature. Finally, a simple equation to determine bubble size as a function of time is given, based on the dimension analysis previously established.

  • Shrinkage of an oxygen bubble rising in a Molten Glass
    Chemical Engineering Science, 2010
    Co-Authors: Franck Pigeonneau, D. Martin, O. Mario
    Abstract:

    Abstract The mechanisms controlling the evolution of a bubble surrounded by Molten Glass are important to understand in order to improve melting in Glass furnaces, particularly during a change in composition. In order to provide insight into this phenomenon, the behavior of an isolated bubble rising in Molten Glass is examined both experimentally and numerically. An experimental procedure developed specifically to observe, in situ, a rising bubble is described. Two soda-lime-silica compositions are tested, with low and high iron content, respectively. The numerical model used to describe bubble shrinkage is based on the results recently proposed in Pigeonneau (2009) . A specific mass transfer coefficient is used for oxygen where the oxidation–reduction reaction of iron oxides is taken into account. A comparison between the experimental and numerical results shows the importance of the oxidation–reduction reaction of iron in the mass transfer of oxygen. The shrinkage rate of a pure O2 bubble is enhanced with reduced Molten Glass iron content.

  • Coupling chemical reactions with mass transfer around a bubble rising in Molten Glass
    2009
    Co-Authors: Vincent Sarrot, Marion Perrodin, Eric Climent, Franck Pigeonneau
    Abstract:

    During Glass production, chemical reactions produce small gas bubbles in Molten Glass. Bubbles are so small and Molten Glass is so viscous that they may be captured during solidification of the Glass leading to defects in the end-product. Adding new reactive species in Glass contributes to eliminate these tiny bubbles. In the present study, numerical simulations have been achieved coupling, around a single bubble rising freely in Molten Glass, mass transfer and chemical reactions.

Mithun Nath - One of the best experts on this subject based on the ideXlab platform.

  • hot corrosion behavior of al2o3 cr2o3 refractory by Molten Glass at 1200 c under static condition
    Corrosion Science, 2016
    Co-Authors: Mithun Nath, Arup Ghosh, Himansu Sekhar Tripathi
    Abstract:

    Abstract Hot corrosion behavior of Al 2 O 3 –Cr 2 O 3 refractory by Molten Glass at 1200 °C under static condition was monitored. Glass-refractory interface was investigated by XRD, SEM and EDX analysis. After 36 h of testing, no visible change was observed, but SEM analysis revealed a corroded region of 315 μm. Corrosion occurs via dissolution of Al 2 O 3 followed by mass exchange and formation of Fe 2 O 3 –Cr 2 O 3 solid solution, which acts as a barrier to the Molten Glass. However, the Cr 2 O 3 fractions of the refractory remained uncorroded.

  • Hot corrosion behavior of Al2O3–Cr2O3 refractory by Molten Glass at 1200 °C under static condition
    Corrosion Science, 2016
    Co-Authors: Mithun Nath, Arup Ghosh, Himansu Sekhar Tripathi
    Abstract:

    Abstract Hot corrosion behavior of Al 2 O 3 –Cr 2 O 3 refractory by Molten Glass at 1200 °C under static condition was monitored. Glass-refractory interface was investigated by XRD, SEM and EDX analysis. After 36 h of testing, no visible change was observed, but SEM analysis revealed a corroded region of 315 μm. Corrosion occurs via dissolution of Al 2 O 3 followed by mass exchange and formation of Fe 2 O 3 –Cr 2 O 3 solid solution, which acts as a barrier to the Molten Glass. However, the Cr 2 O 3 fractions of the refractory remained uncorroded.