REDOX, FINING AND GLASS QUALITY (ADVANCED TRAINING • SEPTEMBER EDITION)

Redox is a key element of glass production that has consequences all along the production chain. The course starts with a definition of the redox state in the batch, melt, and final glass. Then, it describes how redox influences the melting and fining process, foaming behavior, seeds formation, and color variations. You will be able to diagnose better redox-related issues and find solutions faster.

Contents:

• Introduction and definition of redox:

– Batch redox number

– Relations with oxygen partial pressure and temperature

– Optical measurements on the glass

• Glass color: transition elements, amber chromophore, reduced green, decoloration

• Radiative heat transfer

• Sulfur solubility in the melt

• Fining principle and mechanisms

• Mechanisms and root causes of foaming

• Air-fuel versus oxy-fuel furnaces

• Cullet and redox control

• Seeds and bubbles : identifying the origin

• 18 Case study brought by participants or from our archives

Trainers

Corinne Claireaux

Corinne Claireaux studied glass and materials chemistry in Rennes and obtained her PhD from the Sorbonne University in Paris in 2014. She worked as an internal trainer and R&D project leader for Saint-Gobain, improving or developing new glass formulations for different businesses and products (float, glass wool, glass-ceramics). She joined CelSian as a glass scientist and trainer in 2019.

Oscar Verheijen

Oscar Verheijen obtained his PhD from Eindhoven Technical University before joining TNO as a R&D project manager and business development manager of sustainable technologies. He is now R&D and training team leader at CelSian, Board member of the GlassTrend, member of the steering committee of the Dutch Glass Industry (NCNG) and represents the NCNG at European level.

Penny Marson

Penny Marson studied Glass Science and Technology at Sheffield University. She worked in development and process improvement for TV and lighting glass applications at Philips. She joined CelSian in 2012 concentrating on glass melting projects in the lab. As a consultant, researcher and trainer, she loves the challenge to apply experimental work to assist manufacturers in improving their performance while decreasing their environmental footprint.

REDOX, FINING AND GLASS QUALITY (ADVANCED TRAINING • SEPTEMBER EDITION)

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