in metallurgy, a method of converting molten pig iron into steel without the consumption of fuel by purging the pig iron in a rotating converter with technically pure oxygen. The process was developed in 1952 at a plant in Oberhausen, Federal Republic of Germany.
The rotating converter (Figure 1) is a horizontal or slightly tilted cylinder that rotates about its long axis at a rate between 0.1 and 4 rpm. The total duration of smelting in a 60-ton converter from release to release is approximately 2 hours. The process is mainly designed for the conversion of phosphoric pig irons. Because of high construction and operating costs, the oxygen-lance process has not become common.