Advertisements
Advertisements
Question
Explain the following:
Silica is added to the sulphide ore of copper in the reverberatory furnace.
Advertisements
Solution
Copper pyrites contain iron sulphide in addition to copper sulphide. In the reverberatory furnace copper ore is roasted to give oxides. \[\ce{FeO}\] is removed by adding silica from the matte containing \[\ce{Cu2S}\] and \[\ce{FeS}\].
\[\ce{2FeS + 3O2 -> 2FeO + 2SO2}\]
\[\ce{Feo + SiO2 -> \underset{(Slag)}{FeSiO3}}\]
APPEARS IN
RELATED QUESTIONS
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.
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.
How will you convert the following:
Zinc blende to Zinc metal
The impurity that is added externally to remove the impurity already present in the ore is known as ____________.
In the metallurgy of aluminium ______.
Below point ‘A’ \[\ce{FeO}\] can ______.
For the metallurgical process of which of the ores calcined ore can be reduced by carbon?
(i) Haematite
(ii) Calamine
(iii) Iron pyrites
(iv) Sphalerite
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?
Why is sulphide ore of copper heated in a furnace after mixing with silica?
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:
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 ______.
Carbon deposition reaction taking place in ______.
