Molten iron refining method and device thereof
AssigneePosco
InventorsJung Ho Park, Soo Chang Kang, Jin Kyu Chun, Yun Yeol Seo
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Abstract
Provided are a molten metal refining device and method. The molten metal refining method includes: preparing molten metal; dipping an impeller into the molten metal; supplying a liquid dephosphorization agent on top of the molten metal; and stirring the molten metal by rotating the impeller, wherein a solid dephosphorization agent in a powder state is supplied through the lower portion of the impeller in the stirring of the molten metal, thereby improving the stirring efficiency of the molten metal and efficiently controlling the phosphorus concentration in the molten metal.
Claims15
A method of refining molten metal, the method comprising:
- preparing molten metal;
- removing slag from the molten metal;
- dipping an impeller into the molten metal;
- supplying a liquid dephosphorization agent to an upper portion of the molten metal;
- and
- stirring the molten metal by rotating the impeller,
- wherein a solid dephosphorization agent in a powder state is supplied through a lower portion of the impeller during the stirring of the molten metal, and
- wherein in the dipping of the impeller, blades of the impeller are disposed above a midpoint of a total depth of the molten metal, and blowing nozzles of the impeller are disposed under the midpoint of the total depth of the molten metal.
A method of refining molten metal, the method comprising:
- preparing molten metal;
- dipping an impeller into the molten metal;
- supplying a liquid dephosphorization agent to an upper portion of the molten metal;
- and
- stirring the molten metal by rotating the impeller,
- wherein a solid dephosphorization agent in a powder state is supplied through a lower portion of the impeller during the stirring of the molten metal, and
- wherein the liquid dephosphorization agent supplied to the molten metal is 50 wt % to 70 wt % with respect to a total weight of the liquid and solid dephosphorization agents.
Dependencies are inferred from the claim text.