Method and composition for the desulfurization of molten metals

US4159906A · kind A · utility

Assignee

• Suddeutsche Kalkstickstoff-Werke · DE

Inventors

• Walter Meichsner · Krefeld, DE
• Heinrich Rock · Trostberg, DE
• Alfred Freissmuth · Hadermarkt, AT
• Horst Prietzel · Trostberg, DE
• Heinrich Rellermeyer
• Wolfgang Ullrich · Percha, DE
• Erich Pfluger · Trostberg, DE
• Raymund Sindermann · Tacherting, DE

Key dates

• Filing date: May 18, 1977
• Grant date: Jul 3, 1979
• Expiry date: May 18, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21C1/025
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Molten metals, especially molten pig iron, are desulfurized by contacting them with a composition comprising calcium carbide or calcium cyanamide and an additive agent yielding water or hydrogen at the temperature of the molten metal; preferred as the additive agents are the alkali metal hydrides, polyethylene or polyamide for yielding hydrogen and hydrate of lime and alkaline earth borates for yielding water.