What type of reaction produces iron in a blast furnace?
oxidation-reduction reaction
The production of iron from its ore involves an oxidation-reduction reaction carried out in a blast furnace. Iron ore is usually a mixture of iron and vast quantities of impurities such as sand and clay referred to as gangue. The iron found in iron ores are found in the form of iron oxides.
How iron is produced in a blast furnace?
Blast furnaces produce pig iron from iron ore by the reducing action of carbon (supplied as coke) at a high temperature in the presence of a fluxing agent such as limestone.
What are the chemical reactions in a blast furnace?
The reactions of the blast furnace involve 1) combustion of the fuel and its conversion into carbon monoxide, 2) reduction of the ore, and 3) formation of slag. A reaction such as FeO + CO = Fe + CO2 can occur in both the forward and backward direction under conditions existing somewhere in the blast furnace.
What is the word equation for the extraction of iron from iron oxide?
Iron is extracted from iron oxide in the blast furnace. (a) The equation for one of the reactions in the blast furnace is: Fe2O3 + 3CO 2Fe + 3CO2 (i) Complete the word equation for this reaction. (ii) Oxygen is removed from iron oxide in the blast furnace.
Why is iron produced in a blast furnace converted to steel?
The combustion of iron ore with other materials in the blast furnace produces molten pig iron, which is then converted to steel. Blowing oxygen forces impurities (oxides, silicates, phosphates, etc.) to react with flux to form slag or escape through the top of the furnace as fumes.
Why is iron ore used in blast furnace?
Coke, limestone flux, and iron ore (iron oxide) are charged into the top of the furnace in a precise filling order which helps control gas flow and the chemical reactions inside the furnace.
What is added to a blast furnace to remove impurities?
Limestone is also used to remove impurities from the blast furnace when making iron. The impurities are mostly silicon dioxide (also known as sand). The calcium carbonate in the limestone reacts with the silicon dioxide to form calcium silicate (also known as slag).
Why coke is used in blast furnace?
Publisher Summary. Metallurgical coke, along with iron ore and limestone, is layered into a blast furnace to convert the iron ore to metallic iron. Coke, which is mostly carbon, reacts with the blast air to produce carbon monoxide, which, in turn, reacts with the iron oxide to produce carbon dioxide and metallic iron.
What method is used to extract iron?
Reactivity and extraction method
| Metal | Method |
|---|---|
| Aluminium | Electrolysis |
| (Carbon) | (Non-metal) |
| Zinc | Reduction by carbon or carbon monoxide |
| Iron | Reduction by carbon or carbon monoxide |
What process is used to extract iron?
Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as haematite contain iron(III) oxide, Fe 2O 3. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.
How is wrought iron prepared in a blast furnace?
Wrought iron is the purest form of iron available commercially available and is prepared from cast iron by heating cast iron in a furnace lined with Haematite (Fe2O3). The Haematite reacts with Carbon in the cast iron to give pure iron and carbon monoxide gas which escapes. Limestone is then added as flux, and it creates the slag.
How is carbon used in the blast furnace?
Carbon not only provides the necessary heat to melt the iron ore but also serves in a special way as a reducing agent to reduce the iron oxides to iron! The individual chemical processes in the blast furnace are described in more detail in the following sections.
What happens to the ore in the blast furnace?
This concentrated ore is mixed with limestone (CaCO 3) 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
How is limestone removed from a blast furnace?
The limestone also decomposes to CaO which removes the silicate impurity of the ore in the form of Slag. It can be easily separated out of molten iron. The iron manufactured in Blast Furnaces contain about 3 – 4 % of Carbon and smaller quantities of many other impurities such as sulphur, Silicon, etc.
