Treating molten metal with a mixture of a cryogenic fluid and solid carbon black

US4093553A · kind A · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Jean-Baptiste Galey · Saint-Jean-d'Angély, FR
• Gerard Bentz · Trappes, FR
• Pierre Karinthi · Vélizy-Villacoublay, FR
• Ghislain Gilbert · Les Ulis, FR
• Serge Devalois · Saint-Germain-en-Laye, FR

Key dates

• Filing date: Jun 30, 1975
• Grant date: Jun 6, 1978
• Expiry date: Jun 30, 1995

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22D11/106
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A surface of molten metal is covered with a polyphase mixture of a cryogenic fluid and at least one additional constituent in the form of particles, the particles having a size less than 50 microns and forming a homogeneous and stable suspension in the boiling liquefied gas. The particles may be metal or metal oxide or glass or carbon or vegetable or mineral oil, and serve to reduce radiative heat losses from the metal by reflection and/or to serve as a lubricant of the metal in a mold.