) A further reaction in the blast furnace involves calcium oxide, CaO.Describe this reaction and explain its importance
Question
) A further reaction in the blast furnace involves calcium oxide, CaO.Describe this reaction and explain its importance
Solution
In the blast furnace, calcium oxide (CaO) reacts with silicon dioxide (SiO2), which is an impurity in the iron ore. This reaction forms calcium silicate (CaSiO3), also known as slag. The reaction can be represented as follows:
CaO + SiO2 → CaSiO3
This reaction is crucial for two main reasons:
-
Removal of Impurities: The primary purpose of this reaction is to remove impurities from the iron. Silicon dioxide is a major impurity in iron ore, and its removal is necessary to obtain pure iron. The calcium silicate formed is less dense than the iron and floats on top of the iron, where it can be easily removed.
-
Protection of Furnace: The layer of slag also protects the furnace lining from damage due to the high temperatures inside the furnace.
So, the reaction of calcium oxide in the blast furnace is essential for both the purification of iron and the preservation of the furnace itself.
Similar Questions
describe the essential reactions in the blast furnace where each of the four raw materials (iron ore which is hematite, limestone which is calcium carbonate, carbon in the form of coke, air)
ron ore contains iron(III) oxide, Fe 2 O3 . A blast furnace is used to extract iron from Fe 2 O3 .Equations for some of the reactions in the blast furnace are shown.equation 1 C + O2 → CO2equation 2 CaCO 3 → CaO + CO2equation 3 CaO + SiO2 → CaSiO3(a) Equation 1 shows the combustion of carbon in the blast furnace.(i) Name the substance which provides the carbon for this reaction........................................................................................................................................ [1](ii) State the purpose of the combustion of carbon in the blast furnace.
imestone is heated in a blast furnace to produce calcium oxide (lime).The lime reacts with silica impurities in the iron ore in the following reaction:CaO(s) + SiO2(s) → CaSiO3(l)CaO(s) + SiO2(s) → CaSiO3(l)What can be deduced from this reaction?Silica is acidicCalcium oxide is thermally decomposedLimestone is basicCalcium silicate is basic
What substance is decomposed into CO2 and CaO in the blast furnace?1 markCokeLime stoneCarbonCarbon dioxide
rite a chemical equation for the reaction of calcium oxide with silicon(IV) oxide.Suggest whyit is a neutralisation reactio
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.