Casting powder for the continuous casting of steel and method for producing the same

US4248631A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Anton More · Burghausen, DE
• Albert Tosin · Wien, AT

Key dates

• Filing date: Sep 10, 1979
• Grant date: Feb 3, 1981
• Expiry date: Sep 10, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22D11/111
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A casting powder for the continuous casting of steel on the basis of silicate slags having the chemical analysis ______________________________________ 25-45% by wt. of SiO.sub.2 20-45% by wt. of CaO 1-16% by wt. of Al.sub.2 O.sub.3 0.1-15% by wt. of MgO 0.1-1.5% by wt. of FeO (20-45.1% by wt. of CaO + MgO) 0.05-10% by wt. of TiO.sub.2 3-15% by wt. of Na.sub.2 O + K.sub.2 O 0.05-10% by wt. of MnO 0-7% by wt. of B.sub.2 O.sub.3 3-10% by wt. of bound F ______________________________________ which may as well include impurities from the raw materials. The slag is premelted, foamed to a bulk weight of 0.5 to 1.4 kg/l, preferably 0.8-1.2 kg/l and coated superficially with a layer of 1.5 to 15% by weight, preferably 2 to 6%, of carbon black and/or graphite with the aid of an appropriate adhesive.