Patents by Inventor Hermann Pirker

Hermann Pirker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6506225
    Abstract: In a steelmaking process in which, in order to desulfurize iron melts (4) using a strongly basic slag in a desulfurization vessel (7), the desulfurization slag (8) is brought to a temperature of from 1400-1800° C.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: January 14, 2003
    Assignee: Voest-Alpine Industrieanlagenbau GmbH
    Inventor: Hermann Pirker
  • Patent number: 4726839
    Abstract: A process and an arrangement for the production of steel from sponge iron. In order to be able to process sponge iron with high contents of acid gangue and a phosphorus content of more than 3% in an economic and operationally safe manner, the following measures are taken:melting the sponge iron charge, if desired, together with scrap, in an acid-lined electric furnace,tapping the steel melt slag-free into a basic-lined ladle by introducing a particulate dephosphorizing agent into the casting jet,removing the phosphorus-containing slag formed from the ladle and subsequently introducing the ladle into a ladle heating stand, in which additional dephosphorizing agent is blown into the melt together with oxygen or oxygen-containing gas, which treatment, if necessary, is repeated after extraction of the formed slag, with the ladle content optionally being heated to adjust the desired dephosphorization temperature of about 1,550.degree. to 1,600.degree. C.
    Type: Grant
    Filed: April 4, 1986
    Date of Patent: February 23, 1988
    Assignee: Voest-Alpine Aktiengesellschaft
    Inventors: Harald Berger, Hermann Pirker