Process for the heat treatment of fine material

US4127406A · kind A · utility

Assignee

• Polysius AG

Inventors

• Wilfried Kreft · Beckum, DE
• Wolf Goldmann · Beckum, DE

Key dates

• Filing date: May 25, 1977
• Grant date: Nov 28, 1978
• Expiry date: May 25, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22B5/14
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Fine solid material is preheated in a first zone, then heated to the final treatment temperature by passing it through a flame in a second zone, and then separated in a third zone from the hot exhaust gases leaving the second zone. The separated exhaust gases are led to the first zone for preheating the material. A fuel feed stock is gasified to produce a combustible gas, and such gas is burned in the second zone to produce said flame.