Abstract: In order to solve the problems of low phosphorus and high cost in traditional smelting method of high phosphorus steels, based on the analysis of the basic theory of converter dephosphorization, experiments of smelting high phosphorus steels were carried out. Some key controlling parameters such as model of steel scrap, slagging schedule and oxygen lance control which influence the effect of reducing carburization and keeping phosphorus were established. The results of productions showed that, after the optimization of smelting technology, the average phosphorus mass fraction of high phosphorus steels at smelting endpoint reached 0.042 %, and the smelting cost reduced 22.71Yuan per ton of steel.

Key words: converter, high phosphorus steel, decarburization and keep phosphorus