How does direct iron reduction differ from blast furnce reduction?

direct reduction: FeO + C = Fe + CO indirect reduction FeO + CO = Fe + CO2

Here's an explanation of what the two are: Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom or ion. Reduction is the gain of electrons or a decrease in...

the surgeon makes either a submental or an intraoral incision and removes excess bone from the chin with a burr.

iron can be reduced by H2 or CO Fe3O4 + 4CO → 3Fe + 4CO2 Fe3O4 + 4H2 → 3Fe + 4H2O

Fe + H2O = Fe2O3 + H2