Method for operating a shaft furnace, and shaft furnance operable by that method

US8173064B2 · kind B2 · utility

Assignee

• Thyssenkrupp At.Pro Tec GmbH · DE

Inventors

• Gerd Konig · Hofheim, DE
• Wolfram König · Ibbenbüren, DE
• Hans-Heinrich Heldt · Viersen, DE
• Dieter Senk · Aachen, DE
• Heinrich-Wilhelm Gudenau · Aachen, DE
• Alexander Babich · Aachen, DE

Key dates

• Filing date: Nov 9, 2006
• Grant date: May 8, 2012
• Expiry date: Jun 16, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27D19/00
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

Method for operating a shaft furnace, whereby an upper section of the shaft furnace is charged with raw materials which due to gravity descend inside the furnace while the atmosphere prevailing within the shaft furnace causes part of the raw materials to melt and/or to be reduced, and in a lower section of the shaft furnace a process gas is injected so as to at least partly modify the atmosphere prevailing in the shaft furnace. The pressure and/or volume flow of the injected process gas is dynamically modulated within a time span of 40 s. Also, a shaft furnace operable by said method, thus achieving improved through-gassing.