Main Ore:- Haematite. Fe2O3 - Iron Oxide. Method used - reduced using carbon, in a blast furnace. Raw materials - Iron Ore (Fe2O3), Coke & Limestone (CaCO3). At the side of the blast furnace you have air. So what happens?
Stage 1:- C + O2 -----> CO2. Stage 2:- CO2 + C -----> 2CO
Stage 3:- Fe2O3 + 3CO -----> 2Fe + 3CO2
Conversion of Iron into Steel: Use a basic oxygen converter (BOC). Blast O2 into impure iron. C reacts to give CO2: C + O2 -----> CO2. To make steel add back controlled amounts of carbon and/or other metals.
Equation for **** formation/use. Iron ore will contain impurities: Silicon Dioxide SiO2 (sand) removed by Limestone CaCO3.
1. SiO2 --heat--> CO2 + CaO. 2 CaO + SiO2 -----> CaSiO3. Calcium Silicate - ****. **** is the waste material from the blast furnace, which is used in road building.
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