Abstract: In order to control the sulfur content in steel in the process of carbon steel production, countermeasures were carried out. On the basis of theoretical analysis and calculation, the desulfurization process of hot metal and LF refining was optimized according to the sulfur content in hot metal. Otherwise, temperature and composition control, quantity and method of slag addition, as well as desulfurization time and argon blowing were optimized and designed systematically. Industrial tests showed that, nice application effects were obtained, which the hot metal loss was reduced, the temperature of hot metal before converter melting was increased by 28℃, and temperature loss was reduced by 13℃. Moreover, the effective rate of manganese alloy was increased by 6.22%, and sulfur content in steel product was controlled in 0.005%~0.021%, and 0.0156% on average, which could meet the needs of the requirement of customer.

Key words: carbon steel, low cost, high efficient, desulfurization in secondary refining