Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,337 pages of information and 233,846 images on early companies, their products and the people who designed and built them.
The Hörder (Hoerder) Bergwerks-und Hütten-Verein , or Hörder Verein for short, was a mining and iron company in Dortmund.
In 1852, construction began on the first blast furnace (later called Phoenix-Ost).
In 1879 a licence was obtained from Sidney Gilchrist Thomas for the new Thomas process. The Thomas steelworks built in 1880.
See Wikipdia entry.