120 t转炉熔池中硫行为的研究

取样测定了120 t转炉在冶炼过程中熔池中硫的变化情况,通过物料平衡计算研究了熔池中硫的来源,并研究了终点温度、炉渣碱度、渣中(FeO)对硫在渣钢间分配比的影响.结果表明,提高终点温度和炉渣碱度有利于硫分配比的提高,在一定范围内提高渣中(FeO)含量有利于硫分配比的提高,w(FeO)≥18%时,随着(FeO)含量的提高硫分配比减小;减少入炉硫负荷是冶炼低硫钢的基础.

Study on Sulfur Behavior in Steel Bath of 120 t Converter During Blowing

The sulfur behavior in the steel bath of 120 t converter during the blowing process was investigated. The source of sulfur was identified through calculating the material balance and the influences of temperature at end point, the basicity and the FeO content of the molten slag on the partition ratio of sulfur between molten slag and steel were analyzed. The results showed that with the increase of the temperature at the end point and the basicity of molten slag the partition ratio of sulfur is increased, and the partition ratio of sulfur is increased with the FeO content of the molten slag until the FeO content is 18% then the partition ratio of sulfur is decreased. So, decreasing the sulfur load of the molten metal and furnace charge is the prerequisite for production of low sulfur steels.