Techint Compagnia Tecnica Internazionale S.p.a.

Volkwin Koester

The invention relates to a method for cooling a lance provided for converting a medium into a molten mass and/or for measuring the properties of the molten mass. A gas/liquid mixture is fed as a cooling medium into a cooling circuit which is closed up to the lance end ( ) situated on the melting side. The invention provides that the gas/liquid mixture or the components thereof is/are fed and permitted to expand under pressure up to the area of the lance end ( ) situated on the melting side. The invention also relates to a lance which has a mixing chamber ( ) connected to the cooling circuit The mixing chamber has the connections ( ) for a gas and liquid supply which is designed to produce the gas/liquid mixture, whereby the mixing chamber ( ) is connected via a pressure line ( ) to at least one two-component nozzle ( ) arranged in the area of the lance end ( ) which is situated on the melting side.

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Kehl-Bodersweier, Germany

Volkwin Koester