MetallurgyHard
Question
In roasting :
Options
A.moisture is removed.
B.non-metals as their volatile oxide are removed.
C.ore becomes porous.
D.all the above.
Solution
Roasting removes easily oxidisable volatile impurities like arsenic (as As2O3) sulphur (as SO2), phosphorus (as P4O10) and antimony (as Sb2O3).
4M (M = As, Sb) + 3O2 → 2M2O3 ↑
S + O2 → SO2 ↑ ; P4 + 4O2 → P4O10 ↑
Organic matter, moisture if present in the ore, also get expelled and the ore becomes porous.
4M (M = As, Sb) + 3O2 → 2M2O3 ↑
S + O2 → SO2 ↑ ; P4 + 4O2 → P4O10 ↑
Organic matter, moisture if present in the ore, also get expelled and the ore becomes porous.
Create a free account to view solution
View Solution FreeMore Metallurgy Questions
The iron obtained from the blast furnace is called :...During extraction of iron, which of the following act as a flux :...Which group of periodic table contains no metal:...The major role of fluorspar (CaF2) which is added in small quantities in the electrolytic reduction of alumina dissolved...Leaching of Ag2S is carried out by heating it with a dilute solution of :...