Iron-making method by performing coal-based direct reduction in rotary hearth furnace and melting in gas melting furnace on lateritic-nickel ore

Iron-making method by performing coal-based direct reduction in rotary hearth furnace and melting in gas melting furnace on lateritic-nickel ore

  • CN 102,212,636 A
  • Filed: 05/26/2011
  • Published: 10/12/2011
  • Est. Priority Date: 05/26/2011
  • Status: Active Application
First Claim
Patent Images

1. red soil nickel ore rotary hearth furnace coal-based direct reduction-combustion gas is molten divides stove the molten iron smelting method that divides, and it is characterized in that, comprises step:

  • At first, prepare burden, following raw material prepared burden by weight;

    Raw coal also;

    8~

    15 parts;

    Red soil nickel ore;

    70~

    90 parts;

    Fusing assistant;

    8~

    15 parts;

    Then, make ball after above-mentioned three kinds of raw materials are mixed, after the drying green-ball of being made is distributed in the rotary hearth furnace, be heated to 1200 ℃



    1300 ℃

    , keep after 30~

    40 minutes, discharge the hot metal pellet from rotary hearth furnace;

    Afterwards, the molten stove that divides of combustion gas of making fuel with coal gas is sent in the heat pack of described hot metal pellet melt branchs, molten 1420 ℃



    1600 ℃

    of the furnace temperatures that divide of combustion gas melt the 30 minutes time of branch, remove bits after, finally obtain nickelic Rhometal.

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