Chapter 8: Problem 20
Aluminium is added in Bessemer process to remove certain impurities, but not in \(\mathrm{L}-\mathrm{D}\) process. This is because (a) pure oxygen is passed in Bessemer process (b) pure oxygen is passed in \(\mathrm{L}-\mathrm{D}\) process (c) air is passed in \(L-D\) process (d) of addition of spiegel in Bessemer process