how iron ore converted into iron.
Answers
Answer:
Iron ore is converted into various types of iron through several processes. The most common process is the use of a blast furnace to produce pig iron which is about 92-94% iron and 3-5% carbon with smaller amounts of other elements.
Answer:
at firs we need to subject iron ore in to rosting or distillation to remove the water content present in iron.after that we need to subject iron it in to blast fernace reaction to get pure iron.
Explanation:
blast fernace reaction steps:-
The main chemical reaction producing the molten iron is: Fe2O3 + 3CO → 2Fe + 3CO. This reaction might be divided into multiple steps, with the first being that preheated air blown into the furnace reacts with the carbon in the form of coke to produce carbon monoxide and heat: 2 C(s) + O2(g) → 2 CO.
Extraction of iron from its ore is the third and the penultimate process in the Metallurgy. The extraction of metals and its isolation occurs over a few major steps:
Concentration of Ore
Extraction of metal from concentrated Ore
Purification of the metal
How is iron extracted from its ore? It’s a long process which begins with Concentration through calcination roasting. Concentration removes the water and other volatile impurities such as sulphur and carbonates. This concentrated ore is mixed with limestone (CaCO3) and Coke and fed into the blast furnace from the top. It is in the blast furnace that extraction of iron occurs. The extraction of iron from its ore is a long and subdued process, that helps in separating the useful components from the waste materials such as slag.
What happens in the Blast Furnace?
The purpose of a Blast Furnace is to reduce the concentrated ore chemically to its liquid metal state. A blast furnace is a gigantic, steel stack lined with refractory brick where the concentrated iron ore, coke, and limestone are dumped from the top, and a blast of hot air is blown into the bottom. All the three ingredients are crushed into small round pieces and mixed and put on a hopper which controls the input.
Hot air is blown from the bottom and coke it burned to yield temperatures up to about 2200K. Burning coke provides the majority of the heat required for this process. At such high temperatures, Coke reacts with the oxygen in the hot air to form Carbon Monoxide (CO). The CO and heat now move upwards and meet the raw material running down from the top. The temperature in the upper parts of the Blast Furnace is considerably lower than the 2200K at the bottom. In this part, Haematite (Fe2O3) and Magnetite (Fe3O4) are reduced to Ferrous Oxide (FeO).
Reactions in the Blast furnace at 500 – 800 K, In the upper parts with lower temperatures,
3Fe2O3+CO→2Fe3O4+CO2
Fe3O4+4CO→3Fe+4CO2
Fe2O3+CO→2FeO+CO2
At 900 – 1500 K, In the lower sections of the furnace,
C+CO2→2CO
3FeO+CO2→Fe+CO2