Abstract: Recarburizing after tapping in the ladle was widely applied to produce high carbon low phosphorus steel in Beiman Special Steel Co.,Ltd., and a lot of problems appeared in practice. Based on theoretical analysis and industrial experiments, the related technologies, such as slag formation, dephosphorization, the position of oxygen lance and end-point control, were optimized to reduce the effect of bad raw material. Such a high catch carbon technology was developed to produce high carbon steel in Beiman Special Steel Co.,Ltd. The industrial practice showed that the end-point carbon mass fraction rised from 0.12% to 0.29%, the consumption of deoxidizer decreased by averaged 0.21kg/t, the consumption of carburetant decreased by averaged 2.16kg/t, the cost per ton steel decreased by 30.76 yuan, and the rate of the eligible products rised by 3.5%.

Key words: converter, high catch carbon technology, dephosphorization, end-point control, high carbon steel