Paschke-Peetz method

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The Paschke-Peetz process is a metallurgical process used in steel production with which acidic iron ores can be efficiently smelted. It is also called a melting process with acidic slag feed.

description

Until the invention of the process by Clausthal university professor Max Paschke (1884–1961) and his assistant Eugen Peetz , acidic iron ores could only be smelted into good steel by adding lime. This had the disadvantage that more energy had to be supplied for this, which made the blast furnace process uneconomical. Accordingly, until the late 1920s / early 1930s, acidic ores were only used as a supplement for basic ores. Especially in the area north of the Harz there are very large deposits of acidic iron ores, which mainly come from the Upper Jurassic . These ores have been the subject of smelting attempts since their discovery , but they had to be stopped again and again for economic reasons.

During the time of National Socialism , research in this area was intensified and finally Paschke and Peetz achieved the breakthrough by desulphurising the crude steel not in the furnace, but in the Thomaskonverter . Instead of lime , soda was used, which required significantly less energy and material. Paschke and Peetz held a patent on the process.

The process was used in the Völklinger Hütte to smelt the also sour Dogger ores and in the Corby ironworks .

On the basis of the Paschke-Peetz process, the Braunschweig ironworks of the Reichswerke Hermann Göring near Watenstedt was built from 1937/38 , which was supposed to smelt the ores of the Salzgitter area in 32 blast furnaces. The planned annual capacity was 4 million tons of crude steel.

literature

  • Max Paschke, Eugen Peetz: About the metallurgical basics of making foundry pig iron under a new Verhüttungsverfahrens with special consideration of desulfurization processes (=  The Foundry . No. 23 ). 1936, p. 454-460 .
  • Matthias Riedel: The development of the acidic fusion by Paschke and Peetz (=  technology history . No. 36 ). 1991, p. 38-67 .

Web links

Individual evidence

  1. ↑ 428. Salzgitter. Monthly f. Tourism, culture, etc. Economy . ( Memento from June 13, 2016 in the Internet Archive ) (PDF) Vol. 22, Braunschweigisches Jahrbuch , Volume 66, 1985; Retrieved January 5, 2017
  2. ↑ Inventory 195 Haverlahwiese iron ore mine, Salzgitter on archive.nrw.de; Retrieved January 5, 2017
  3. ^ Friedrich August Karl Lüth: Planning and construction of iron and steel works . 2013, ISBN 978-3-662-25179-9 , desulphurization system in the Google book search
  4. ↑ Class 18a, Gr. 3, P 73059; Add. z. Note P 69 193. Process for the production of pig iron from a molar, particularly rich in silica or sulfur. Dr.-Ing. Max Paschke, Clausthal-Zellerfeld, and Dr.-Ing. Eugen Peetz, Duisburg-Hüttenheim. In: Stahl und Eisen , No. 25, June 24, 1937, Patent Gazette No. 24 of June 17, 1937, p. 709, bg.polsl.pl (PDF; 3.6 MB)
  5. ↑ Paul Erker, Toni Pierenkemper: German entrepreneurs between war economy and reconstruction: Studies on the experience of industrial elites Chapter VIII. The smelting of pig iron with acidic slag flow and the influence of this process on the design of ironworks . de Gruyter, 1999, ISBN 978-3-486-59440-9 , limited preview in the Google book search