Cold crucible heated by high frequency for melting glass has a wall formed by tubes through which coolant flows and is provided with a protective layer formed by starting materials in the start-up phase of the melting process

摘要

Cold crucible (1) heated by high frequency has a wall formed by tubes (2) through which coolant flows, and an induction unit for introducing high frequency energy into a melting region of the crucible. The crucible is provided with a protective layer formed by starting materials in the start-up phase of the melting process.