section_path: Redox reactions in geology
section_name: Redox reactions in geology
paragraph_text: Redox reactions in geology
  
  Minerals are generally oxidized derivatives of metals. Iron is mined as its magnetite (Fe O). Titanium is mined as its dioxide, usually in the form of rutile (TiO). These oxides must be reduced to obtain the corresponding metals, often achieved by heating these oxides with carbon or carbon monoxide as reducing agents. Blast furnaces are the reactors where iron oxides and coke (a form of carbon) are combined to produce molten iron. The main chemical reaction producing the molten iron is: