NEETMetallurgyHard
Question
Choose the correct option using the code regarding roasting process.
(I) It is the process of heating the ore in air in a reverberatory furnace to obtain the oxide.
(II) It is an exothermic process.
(III) It is used for the concentration of sulphide ore.
(IV) It removes easily oxidisable volatile impurities present in the concentrated ore.
(I) It is the process of heating the ore in air in a reverberatory furnace to obtain the oxide.
(II) It is an exothermic process.
(III) It is used for the concentration of sulphide ore.
(IV) It removes easily oxidisable volatile impurities present in the concentrated ore.
Options
A.I, II and III
B.I, II and IV
C.I, III and IV
D.I, II, III and IV
Solution
Ore is heated below its melting point in a reverberatory furnace in the presence of air to convert it into its oxides. It removes easily oxidisable volatile impurities like arsenic as As2O3, antimony as Sb2O3 and sulphur as SO2. Roasting is an exothermic process; once started it does not require additional heating.
Create a free account to view solution
View Solution FreeMore Metallurgy Questions
To obtain chromium from chromic oxide (Cr2O3) the method used is :-...From the following statements regarding H2O2, choose the incorrect statement :...Magnetic separation process may be used for the concentration of :...Silica is added to roasted copper ores during extraction in order to remove...Which of the following process(es) occur(s) during the extraction of copper from chalcopyrites ?...