Recent Developments in Pneumatic Steelmaking

In 1950, the Steel Industry in most countries had just recovered from the war and only 189 million tons of raw steel was produced during that year throughout the world. At that time, the main steelmaking process was the Open Hearth Furnace in which 77.5% of the steel was produced. The electric arc furnace represented not more than 6.5% and the only important pneumatic process was the basic Bessemer converter which produced 20 million tons of raw steel, i.e. 10.5% of the total production.