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extra. of iron
Chemistry
Question | Answer |
---|---|
This reaction uses the what? and why? | The blast furnace because iron is less reactive than carbon |
What raw materials are used? | Iron ore (haematite), coke (carbon), limestone (calcium carbonate) & and air. |
Firstly.. | The iron ore, coke & limestone are all mixed together and fed into the top of the blast furnace. |
Secondly... | Hot air is blasted into the bottom of the furnace!!!!!!!!! |
The first reaction is what? | Oxygen from the air reacts with carbon to form carbon dioxide |
(Oxygen reacts with what?) | Oxygen from the air reacts with carbon to form carbon dioxide |
What's the equation for this? (include state symbols) | O2(g) + C(s) -> CO2(g) |
Then, the carbon dioxide reacts with what and what is formed? | The carbon dioxide reacts with the coke (carbon) forming carbon monoxide |
What's the equation for this? (include state symbols) | CO2(g) + C(s) -> 2CO(g) |
What's the next reaction? | The carbon monoxide reacts with the iron(iii) oxide in the iron ore |
(what does the carbon monoxide do?) | The carbon monoxide reacts with the iron(iii) oxide in the iron ore |
What's the equation for this (ss)? | Fe2O3(s) + 3CO(g) -> 2Fe(l) + 3CO2(g) |
What happens to the iron formed? | It melts and is collected at the bottom and is then tapped off. |
Then what happens to the calcium carbonate in the limestone? | It decomposes to form calcium oxide |
What's the equation for this (ss)? | CaCO3(s) -> CaO(s) + CO2(g) |
What's the next reaction? | The calcium oxide reacts with silicon dioxide, which is an impurity in the iron ore, to form calcium silicate. |
what's the equation for this? (ss) | CaO(s) + SiO2(s) -> CaSiO3(l) |
What then happens to the calcium silicate? | It melts and collects as molten slag on top of the molten iron, which is then tapped off separately. |