Patents by Inventor William John Errington

William John Errington 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 and apparatus for lead smelting
    Patent number: 8133295
    Abstract: A method for producing lead involves feeding lead concentrate, flux and solid fuel passing to a feed preparation unit. The prepared, mixed feed is then passed to a lead smelting furnace, such as an ISASMELT furnace or other top entry, submerged lance furnace. Air or oxygen, is injected into the molten charge in the ISASMELT furnace via the submerged lance. The feed mixture is converted into lead bullion and a lead-containing slag. The slag removed from the furnace is formed into lumps having a desirable size range. The slag lumps, together with coke and flux are fed into a blast furnace. In the blast furnace, the slag is converted into lead bullion and discard slag. The lead bullion removed may be subsequently fed to a lead refinery for further treatment.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: March 13, 2012
    Assignees: Yunnan Metallurgical Group, Xstrata Technology Pty Ltd
    Inventors: Philip Scott Arthur, William John Errington
  • METHOD AND APPARATUS FOR LEAD SMELTING
    Publication number: 20080250900
    Abstract: A method for producing lead involves feeding lead concentrate, flux and solid fuel passing to a feed preparation unit. The prepared, mixed feed is then passed to a lead smelting furnace, such as an ISASMELT furnace or other top entry, submerged lance furnace. Air or oxygen, is injected into the molten charge in the ISASMELT furnace via the submerged lance. The feed mixture is converted into lead bullion and a lead-containing slag. The slag removed from the furnace is formed into lumps having a desirable size range. The slag lumps, together with coke and flux are fed into a blast furnace. In the blast furnace, the slag is converted into lead bullion and discard slag. The lead bullion removed may be subsequently fed to a lead refinery for further treatment.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 16, 2008
    Inventors: Philip Scott Arthur, William John Errington