The annual output of steel melted by converter was nearly up to 190 million tons in China in 2003

which was 85.2% of annual output of steel in China and was 25% of world converter steel output in that year. The number of 50 ~ 300 t converters increased to 134 sets in 2003 from 75 sets in 2001

and the process and technology of converter steelmaking further optimized. the new grade steel and quality steel melted by converter increased very fast including lo w alloy steel

atmospheric corrosion resistant steel

TRIP(transformation induced plasticity steel

and special steel such as alloy structure steel

gear steel

bearing steel and steel for boiler. In the future the converter steel production mainly depended on potential- tapping and revamping of excellent iron and steel producers to further improve technology and equipment

expend ·steel grade range

increase quality of steel

reduce consumption and improve environment.