When sulphur is to be removed from cast iron while melting the same in cupola, the flux used is
A)molasses
B)sodium carbonate with lime stone
C)zinc sulphate with lime stone
D)none of the above

Question

Quizplus · Accepted Answer

Sodium carbonate with limestone is used as a flux to remove sulfur from cast iron during the melting process in a cupola. Sodium carbonate reacts with sulfur to form sodium sulfate, which is then absorbed by limestone, facilitating the removal of sulfur from the molten iron.

When Sulphur Is to Be Removed from Cast Iron While