Glass & Oxides
Some oxides and salts have thermal and electrical insulating properties at room temperature and become conducive at high temperatures. Due to ionic conduction, the electrical resistance of oxides (1-10 Ω.cm at 1,500°C) means they can be heated and melted by induction.
Because they have weak thermal conduction at low temperatures and their resistivity decreases as the temperature goes down, the self-crucible direct induction technique can be applied using an equal skin depth to radius of load ratio.
A self-crucible is when a melt is kept inside an insulating shell (gangue) made of the same solid material to be melted. The bath can reach temperatures of 2,500°C without any contact between the bath and the inductor (no product contamination).
There are various startup techniques:
- Radiant load
- Gas burner
- Inductive load
Self-crucible direct induction melting is an ideal solution for continuous or batch melting processes with overflow or bottom tapping (induction spout).
This high-performance technology is industry-ready, flexible and can effectively be used to melt a wide range of workpieces with excellent energy efficiency.
• Crystal melting
• Special or technical glass melting
• Refractory oxide melting, developing phosphates
• Waste vitrification (residue from fume purification of household waste incineration, asbestos, etc.).
- High melting temperatures above 2,500°C
- Maximum energy efficiency (1-1.5 kWh/kg of glass cast)
- Low maintenance, no wearing parts
- Easily adjustable
- Wide use range (50-1,000 kg/production hour) with inductive powers of 100-2,000 kW
- Good thermal consistency for bath (no hot points and includes a cold roof)
- Flexible enough for production changes (load changes)
⇒ For recruitment-related matters (application, etc.), please do not use this form. Make your requests on this page.
In order to address your request, we need to collect the information listed in the form below
Information on data processing
As a data processor, FIVES implements personal data processing when managing your contact request. The data collected are required for this processing and are retained, unless you object, for a period of 6 months from the last contact between you and FIVES. If the information is incomplete, FIVES will not be able to respond to your contact.
The data collected are exclusively for the use of FIVES departments.
Pursuant to current legislation, you have the right to request access to data concerning you, their correction, deletion and portability, as well as a right of limitation over processing of your data.
These rights can be exercised by email to DPO@fivesgroup.com or by post to the Data Protection Officer at the following address: FIVES, 3 Rue Drouot, 75009 Paris, accompanied by a copy of an identity document.
In case of a dispute involving processing of your personal data, you have the right to make a complaint to the French Data Protection Agency (CNIL).
To find out more about our personal data protection policy click here