In both the Acid Bessemer and Basic Bessemer processes molten pigiron is refined by blowing air through it in an egg-shaped vessel, known as a converter, of 15-25 tonnes capacity.
The influence of graded levels of diet calcium (Ca) and ascorbic acid (AA) on the retention of iron (Fe), copper(Cu), Zinc (Zn), Ca, phosphorus (P) and magnesium (Mg) was studied in the guinea pig.