| 摘要 |
A method for refining iron-base metal such as pig iron which contains minor amounts of elements including silicon, manganese, phosphorus, carbon, sulfur, and other incidental impurities, characterized by the steps of containing molten iron-base metal in a metallurgical vessel, heating and oxidizing the molten metal to cause chemical reactions to remove excessive contents of the said elements, adding slag conditioners of relatively high basicity (lime-to-silica ratios of 2.5:1 to 4.0:1) which conditioners consist essentially of oxides of selected metals including iron, manganese, silicon, magnesium, and calcium, and which conditioners have a melting point of from about 2000 DEG to 2800 DEG F, and continuing to heat while oxidizing the mixture of the molten metal, slag conditioner, and slag-forming materials until said minor amounts of elements are reduced to the desired percentages, and are retained in the slag formed. More specifically, the function of the slag-conditioner is to eliminate the encapsulation of large particles of lime by dicalcium silicate and thereby more rapidly taking the lime into solution. Thus, the need for fluorspar is eliminated.
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