Facility for hot metal manufacturing by directly using small or lump coal and powdered iron ores, method for producing the same, complete steel mill using the facility and manufacturing method

Facility for hot metal manufacturing by directly using small or lump coal and powdered iron ores, method for producing the same, complete steel mill using the facility and manufacturing method

  • CN 102,031,324 B
  • Filed: 12/06/2004
  • Issued: 05/20/2015
  • Est. Priority Date: 12/05/2003
  • Status: Active Grant
First Claim
Patent Images

1. manufacture a method for molten iron, comprise the following steps:

  • To mix with auxiliary material containing fine iron ore, and the mixture that drying obtains, to produce containing iron mixture;

    When the multistage fluidized bed reactor unit that this is contacted by wherein fluidized-bed reactor mutually containing iron mixture, carry out reducing and sinter will be converted into reducing material containing iron mixture;

    At high temperature suppress this reducing material to manufacture nodulizing;

    The coal briquette that lump coal and compacting fine coal obtain is loaded in melter-gasifier to form the thermal source of coal packed bed as fusing nodulizing;

    Nodulizing is loaded in the melter-gasifier be connected with multistage fluidized bed reactor unit, and to melter-gasifier delivering oxygen, to manufacture molten iron;

    AndThe reducing gas that melter-gasifier discharges is provided to multistage fluidized bed reactor unit,Described method also comprises the steps;

    Separate the exhaust flow discharged by multistage fluidized bed reactor unit, and remove the CO in waste gas 2;

    Will remove CO 2reformed exhaust gas flow mix with the reducing gas that melter-gasifier discharges;

    With Heat the reducing gas mixed mutually with reformed exhaust gas flow, be then provided in multistage fluidized bed reactor unit and contain the temperature needed for iron mixture the temperature of reducing gas to be adjusted to reduction in multistage fluidized bed reactor unit.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×