Method for adjusting amount of semi coke added in mixed pulverized coal for injection according to blast furnace condition

Method for adjusting amount of semi coke added in mixed pulverized coal for injection according to blast furnace condition

  • CN 109,112,239 B
  • Filed: 06/26/2017
  • Issued: 09/14/2021
  • Est. Priority Date: 06/26/2017
  • Status: Active Grant
First Claim
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1. A method for adjusting the amount of semi-coke added in mixed pulverized coal for injection according to the condition of a blast furnace is characterized in that the amount of the semi-coke added in the mixed pulverized coal for injection is adjusted and calculated by adopting the following method:

  • LT=

    A+k1×

    FW+k2×

    FYL+k3×

    HFF+k4×

    PCIthe symbols in the formula;

    LT is the adding amount of the semi-coke in the amount of the coal powder injected per ton of iron, kg/t;

    a is a constant and takes a value of 71-74 kg/t;

    k1as a coefficient, kg/(t. DEG C.), FW is blast temperature of the blast furnace, DEG C;

    k2in terms of coefficient, kg/t, FYL is oxygen enrichment rate in blast air,%;

    k3the coefficient is kg/t, and HFF is the content percent of volatile components in the coal powder to be blown;

    k4the PCI is the ratio of coal injection, kg/t;

    k1the value is-0.155 to-0.164;

    k is a radical of22672-2737;

    k is a radical of3Taking values of 160-168;

    k is a radical of4The value is 0.351-0.359;

    FW values are 800-1350 ℃

    ;

    FYL takes the value of 0 percent to 8.0 percent;

    HFF takes 8.0% -35.0%;

    the PCI value is 60-240 kg/t.

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