The oxygen steelmaking process, for example, was developed in Austria, but Nagano and his colleagues were quicker to appreciate its quality and cost-saving features than their Western rivals were.

The recovery quantity of converter gas got increased in semisteel steelmaking process by means of optimizing oxygen feeding, improving operation level, reforming gas recovery system.

The meaning of automatic load change control system used in oxygen making process is introduced according to relationship between steelmaking and oxygen making.