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← HistoryWhich consequence results when early Chinese blast furnaces used coke from coal rather than charcoal for smelting?
A)Increased sulfur contamination in iron✓
B)Reduced carbon content in steel
C)Higher silica content in slag
D)Decreased phosphorus concentration in iron
💡 Explanation
Using coke with higher sulfur content caused increased sulfur contamination in the iron due to the principle of chemical absorption; because sulfur readily dissolves in molten iron, rather than being fully removed during smelting, therefore the iron's brittleness increased during forging.
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