Of lron Ore Lumps of Lime - In the upper part of the furnace the carbonic oxide deoxidizes the iron oxide of the ore by such reactions as xCO+Fe02.
Part of the resultant carbonic acid is again deoxidized to carbonic oxide by the surrounding fuel, CO 2 + C = 2C03 and the carbonic oxide thus formed deoxidizes more iron oxide, &c. As indicated in fig.
Coke now charged into this slag first deoxidizes any iron oxide contained in either slag or metal, and next deoxidizes part of the lime of the slag and thus forms calcium, which, uniting with the sulphur present in the molten metal, forms calcium sulphide, CaO+FeS-}-C=CaS+Fe+CO.
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