Patents by Inventor Pavel A. Kovgan

Pavel A. Kovgan 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 treating sulfide raw materials
    Patent number: 4300949
    Abstract: The present invention relates to the field of non-ferrous metallurgy and more specifically to methods for treating sulfide raw materials.The method comprises an autogenous smelting of the raw materials with flux additions in a blast furnace, where a quartz layer 0.3 to 1.5 m high is provided immediately above the tuyeres of the furnace. The smelting process is conducted with oxygen-enriched air blowing with an oxygen consumption of 300 to 400 m.sup.3 /tonne of sulfide material. The smelting method produces matte suitable for subsequent converting, elemental sulfur, and off-gases containing 8 to 25% SO.sub.2.The method can be applied for copper and copper-nickel production.
    Type: Grant
    Filed: March 7, 1980
    Date of Patent: November 17, 1981
    Inventors: Konstantin I. Ushakov, Mikhail E. Khilko, Rina I. Felman, Vasily I. Sadykov, Evgeny I. Kalnin, Pavel A. Kovgan