Method and device for controlling process gases for heat treatments of metallic materials/workpieces in industrial furnaces

US8465603B2 · kind B2 · utility

Assignee

• Ipsen, Inc. · US

Inventors

• Werner Hendrik Grobler · Stuttgart, DE
• Thomas Eversmann · Dorsten, DE
• Bernd Edenhofer · Kleve, DE
• Jens Bechthold · Hamminkeln, DE
• Dirk Joritz · Wesel, DE
• Nils Bernhagen · Kleve, DE

Key dates

• Filing date: Dec 15, 2010
• Grant date: Jun 18, 2013
• Expiry date: Sep 8, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7837
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

For regulating process gases for heat treatments of metal materials/workpieces in industrial furnaces (1), which have at least one treatment chamber (2), at least one burnoff point (4) having at least one first valve (4.1), and a regulator (5) having pressure meter (5.1), the burnoff point (4) is only to be opened as a function of requirements related to the process gas. For this purpose, in a first step, with open first valve (4.1), a quantity of a flushing gas (6.1) of the gas mixture (6) of the respective process gas is supplied in a controlled manner to the industrial furnace (1) and then burned off, in a second step, the valve (4.1) is closed, the industrial furnace (1) is regulated to a preset furnace pressure and this is permanently detected via the pressure meter (5.1), in a third step, with the target pressure of the industrial furnace achieved, this pressure is detected via the pressure meter (5.1) and maintained, the first valve (4.1) further remaining closed. In a fourth step, the flushing gasification can be activated and adjusted. In the event of large pressure rise, in a fifth step, an overpressure flap (4.3) of the burnoff point (4) can be opened in a controlled man…