Method for preventing KR stirring desulfurization slag tank from being stuck

Method for preventing KR stirring desulfurization slag tank from being stuck

  • CN 104,531,949 B
  • Filed: 12/17/2014
  • Issued: 11/10/2020
  • Est. Priority Date: 12/17/2014
  • Status: Active Grant
First Claim
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1. A method for preventing KR stirring desulfurization slag pot from being stuck is characterized by comprising the following process steps:

  • 1) before the slag pot is put into use, 10 Kg/ton of coke powder of steel slag and 40 Kg/ton of dry blast furnace granulated slag of steel slag are added at the bottom of the slag pot, the granularity of the blast furnace granulated slag is controlled below 3mm, the pot is hung on a converter steel slag car, the steel slag car is driven to a slag discharging point to receive slag, and chemical reaction can occur in the process;

    3C + Fe2O3=3CO ═

    2Fe, the generated CO gas overflows to foam slag particles, and an extremely thin slag film is formed on the inner wall of the slag tank;

    SiO in blast furnace granulated slag2And Al2O33 CaO. SiO in the converter slag2And (3) reacting, namely reducing the viscosity of the converter slag to ensure that the converter slag forms a uniform slag film in the slag pot, wherein the equation of the reaction is as follows;

    3CaO SiO2+SiO2

    2CaO·

    SiO2

    Al2O3+3CaO·

    SiO2

    CaO·

    Al2O3+2CaO·

    SiO2(ii) a

         2) After the slag receiving, the slag car is driven to a slag field to pour liquid steel slag in the slag tank, then the slag tank with the inner wall adhered with a slag film is used for containing desulfurized slag, the film has extremely high refractoriness, plays a role of partition, and avoids a slag sticking tank caused by direct contact between molten iron in the middle of desulfurized slag and the slag tank.

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