Patents Assigned to Rio Tinto Brasil
  • Pre-treatment process for feed material for direct reduction process
    Patent number: 7175690
    Abstract: A pretreatment process for solid lump feed material for a gas and pellet/lump-based direct reduction process, comprising preheating feed material to a temperature of from about 200 C to about 500 C, without reduction, in a non-reducing atmosphere prior to charging the feed material to gas-based direct reduction furnace, thereby minimizing the formation of fines within the furnace.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: February 13, 2007
    Assignee: Rio Tinto Brasil
    Inventors: Stephen M. Potter, John Y. Clark