Advertisements
Advertisements
Question
The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnace? Explain by giving reaction.
Advertisements
Solution
Haematite\[\ce{(Fe2O3)}\] is used. It supplies the oxygen and oxidises carbon, silicon, manganese and phosphorus present in the cast iron to \[\ce{CO}\], \[\ce{SiO2}\], \[\ce{MnO}\] and \[\ce{P2O5}\] respectively.
\[\ce{Fe2O3 + 3C ->[Heat] 2Fe + 3CO}\]
\[\ce{3Si + 2Fe2O3 -> 4Fe + 3SiO2}\]
\[\ce{3S + 2Fe2O3 -> 3SO2 + 4Fe}\]
\[\ce{CO}\] and \[\ce{SO2}\] escape and \[\ce{MnO}\] and \[\ce{SiO2}\] combine to form manganous silicate \[\ce{(MnSiO3)}\] as slag.
\[\ce{MnO + SiO2 ->[Heat] \underset{Manganous silicate (Slag)}{MnSiO3}}\]
APPEARS IN
RELATED QUESTIONS
How is ‘cast iron’ different from ‘pig iron’?
Is it true that under certain conditions, Mg can reduce SiO2 and Si can reduce MgO? What are those conditions?
Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.
Write chemical reactions taking place in the extraction of zinc from zinc blende.
State the role of silica in the metallurgy of copper.
The choice of a reducing agent in a particular case depends on thermodynamic factor. How far do you agree with this statement? Support your opinion with two examples.
Write chemical reactions taking place in the extraction of copper from Cu2 S.
The impurity that is added externally to remove the impurity already present in the ore is known as ____________.
Choose the correct option of temperature at which carbon reduces \[\ce{FeO}\] to iron and produces \[\ce{CO}\].
For the reduction of \[\ce{FeO}\] at the temperature corresponding to point D, which of the following statements is correct?
How is copper extracted from low grade copper ores?
The mixture of compounds A and B is passed through a column of \[\ce{Al2O3}\] by using alcohol as eluant. Compound A is eluted in preference to compound B. Which of the compounds A or B, is more readily adsorbed on the column?
Write down the reactions taking place in Blast furnace related to the metallurgy of iron in the temperature range 500-800 K.
Explain the following:
Silica is added to the sulphide ore of copper in the reverberatory furnace.
Explain the following:
Carbon and hydrogen are not used as reducing agents at high temperatures.
A cuprous ore among the following is:-
Heating of MgCl2 6H2O in absence of HCl gives ______.
\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]
The number of CN− ions involved in the balanced equation is ______.
