in this process air is blown through molten copper matte in a Bessemer converter. any remaining products (e.g. FeS) is oxidized and removed as slag (FeSiO3). in the final smelting step cuprous oxide , which reacts with remaining cuprous sulphide to metallic copper. the product called blister copper is 97 -99 % pure Cu with entrapped bubbles of So2(g). bessemerisation is also used to convert pure iron to steel.
Bessemerization is a process that involves converting pig iron into steel by blowing air through the molten iron to remove impurities such as carbon, silicon, and manganese. This process revolutionized steel production in the 19th century by making it faster, more efficient, and cheaper. Sir Henry Bessemer is credited with developing this method.