Johann Christian Ruberg
Johann Christian Ruberg (baptized 4 September 1746 – 5 September 1807) was a German inventor and a pioneer in metallurgy.
About 1798, Ruberg devised the first large-scale method for the production of zinc. This method (so-called "Silesian method"), used horizontal muffle furnaces which permitted for continuous operation, i.e., loading the input and unloading the product without cooling. This greatly improved the energy economy and labour intensity of the process. It subsequently led to the development of large zinc manufacturing industry in Silesia. Ruberg also authored several inventions and optimizations in glass-making.
Ruberg is buried at the Lutheran parish church cemetery at the Hołdunów subdivision of Lędziny, where a memorial to him was installed in 1998. In 2000, an elementary school at Lędziny (Szkola Podstawowa No 3) received his name. 
- Allgemeine Deutsche Biographie:Ruberg, Johann Christian (in German, at Wikisource)
- Ernest Alfred Smith, "The Zinc Industry", BiblioBazaar, LLC, ISBN 0-554-78657-5, ISBN 978-0-554-78657-5, 2008.
- Piotr Greiner in "Moja Ziemia Katowice", publisher: Bractwo Gospodarcze Zwiazku Górnoslaskiego, Katowice, 2004 (in Polish)
|This German biographical article is a stub. You can help Wikipedia by expanding it.|