Refine method of hot metal
A technology for molten iron and refining furnaces, which is used in the improvement of process efficiency, manufacturing converters, metal recovery, etc., can solve the problems of bump boiling, reduction in production volume, and increase in loss of refractory materials in the furnace body, so as to increase the compounding amount and the yield of finished products. improved effect
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[0062] Example
[0063] Hereinafter, the present invention will be described in further detail through examples. according to figure 1 In the shown processing flow of the molten iron refining method of the present invention, the following tests were performed. In the following test, the dephosphorization treatment (desiliconization / dephosphorization treatment) of the molten iron that was not subjected to the desiliconization treatment in the preliminary treatment refining furnace 14 was performed.
[0064] The low-phosphorus molten iron 2 with a phosphorus concentration of 0.020% by mass is charged into a 300-ton capacity decarburization refining furnace 3 (converter), and quicklime and dolomite are charged as fluxes. Argon gas (Ar Gas) is blown in as a stirring gas and oxygen is supplied from the top blowing lance to perform decarburization refining. After the decarburization refining is completed, the obtained molten steel 5 is discharged to the ladle 7, and the molten steel 5...
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