Ancient Chinese blast furnaces used coke rather than charcoal for iron smelting; which outcome directly resulted from coke's increased combustion temperature?

💡 Explanation

Coke's higher combustion temperature facilitated increased removal of phosphorus from the iron ore via oxidation and inclusion in the slag. Therefore the lower phosphorus concentration in iron yields a stronger material rather than the other options, because it changed the chemical kinetics.

• Which risk increased in early Mesopotamian bronze metallurgy workshops lacking adequate ventilation?
• Which limiting factor reduces accuracy when using sextants from small craft?
• Which limitation increases when a brass astrolabe undergoes significant use?
• Which consequence occurs to the accuracy of an astrolabe when the alidade vane is skewed?
• Which mechanical behavior arose in early astrolabes due to unequal thermal gradients?
• Which outcome results when bronze sickle blades are improperly heat treated during manufacture?