What happens to iron ore in a blast furnace?
The 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. In this reaction, the iron(III) oxide is reduced to iron, and the carbon is oxidised to carbon dioxide.
What is the iron alloy that is produced in a blast furnace known as?
Pig iron
Pig iron, also known as crude iron, is an intermediate product of the iron industry in the production of steel which is obtained by smelting iron ore in a blast furnace.
Why is coke added to the 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 element is added to blast furnace iron to increase its usefulness?
Calcium oxide is a basic oxide and reacts with acidic oxides such as silicon dioxide present in the rock. Calcium oxide reacts with silicon dioxide to give calcium silicate. The calcium silicate melts and runs down through the furnace to form a layer on top of the molten iron.
Which is the better fuel coal and coke?
Coke is a better fuel than coal because; -Coke produces more heat on burning than coal. -Coke has a higher calorific value than coal. When equal masses of coke and coal are burnt, coke produces more heat.
What is Coca Cola’s secret formula?
The rediscovered recipe includes extract of coca leaves, caffeine, plenty of sugar (it specifies 30 unidentified units thought to be pounds), lime juice, vanilla and caramel. Into that syrup, the all-important 7x flavourings are added: alcohol and six oils – orange, lemon, nutmeg, coriander, neroli and cinnamon.
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 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 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.
What kind of ore is used to extract iron?
Extraction of Iron. Iron is extracted from its ore in the blast furnace. The main iron ore is called haematite. Haematite is iron ( III) oxide – Fe 2 O 3.