RH喷粉脱硫工业试验研究

Study on process of RH desulfurization by powder injection

对RH喷粉脱硫原理进行了详细分析,并指出移动脱硫在整个脱硫过程中的重要作用,提出可以通过增加钢液中脱硫剂量和延长脱硫剂在钢液中停留时间两方面提高RH脱硫效率。并通过工业试验优化了RH喷粉枪位和脱硫过程中驱动气体流量,研究发现最佳RH喷粉枪位为1.3 m,脱硫过程中的最佳驱动气体流量为50 m3/h。优化后的RH工艺满足了生产要求,能够将钢液中的硫质量分数稳定控制在15×10-6以内。

The principle of desulfurization by powder injection was analyzed in detail in this paper. Increasing the quantity of desulfurizer in liquid steel and prolonging the desulfurizer resistance time in liquid steel were proposed to increase RH desulfurization efficiency. And the work of optimizing RH powder injection lance height and driving gas flow rate in desulfurizing process by commercial tests was carried out. The results showed that the optimal RH powder injection lance height was 1.3 m and the best driving gas flow rate in desulfurizing process was 50 m3/h. The optimized RH parameters could meet the requirements of producing and the mass fraction of sulfur in the steel could be controlled to be less than 15×10^-6 steadily.