Method for conducting electric arc furnace steelmaking by taking scrap steel as raw materials

Method for conducting electric arc furnace steelmaking by taking scrap steel as raw materials

  • CN 105,567,903 A
  • Filed: 01/18/2016
  • Published: 05/11/2016
  • Est. Priority Date: 01/18/2016
  • Status: Active Application
First Claim
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1. be the method that raw material carries out electric-arc furnace steelmaking with steel scrap, comprise step:

  • 1) steelmaking feed is refined into molten steel in electric arc furnace;

         2) refining removal of impurities is carried out to molten steel;

         3) tap, molten steel is cast, obtains steel;

    It is characterized in that, step

         1) in, described steelmaking feed, by weight, for;

    30-70 part slag, 10-15 part beans steel, the rolling of 5-10 part discard steel and 30-50 part steel-making dedusting ash;

    In the process of described refining molten steel, add lime slag making, the total amount of lime is the 3.2-4% of raw material weight, carries out either shallow oxygen blast and flux when melting sources 65 ~ 70%, and oxygen pressure is 0.30-0.35MPa in batches;

    Step

         2) in, in described refining process, when liquid steel temperature is increased to 1550 DEG C, carry out degree of depth oxygen decarburization, oxygen pressure is 0.85 ~ 0.90MPa.

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