Patents by Inventor Antti Jalonen

Antti Jalonen 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).

  • Method for cooling the gas flow in a smelting furnace
    Patent number: 6547848
    Abstract: The present invention relates to a method for cooling the gas flow exiting through the uptake of a smelting furnace such as a flash-smelting furnace with finely dispersed liquid sprays, which prevents the solid matter particles contained within from coalescing and sintering.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: April 15, 2003
    Assignee: Outokumpu Oyj
    Inventors: Antti Jalonen, Risto Saarinen
  • Method for thermally regenerating spent acid
    Patent number: 6180078
    Abstract: A process is provided for the thermal decomposition of contaminated sulfuric acid, which was obtained from the scrubbing of sulfur dioxide contaminated gases created in the pyrometallurgical production of metals. The contaminated sulfuric acid is concentrated to obtain a H2SO4 content of 70% to 80%, wherein, during the concentration step, a portion of the metal components, such as arsenic component, zinc sulfate, cadmium sulfate and copper sulfate, as well as halogens, are removed from the sulfuric acid. The concentrated and purified sulfuric acid is fed into the exhaust shaft of a smelting furnace so that the heat of the smelting furnace exhaust gases thermally decomposes the sulfuric acid into sulfur dioxide, water and oxygen.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: January 30, 2001
    Assignee: Outokumpu Oyj
    Inventors: Jaakko Poij{umlaut over (a)}rvi, Antti Jalonen, Johannes Holmi, Jari Ojala