基于冶金热力学的钢液定氧探头氧浓度单位确定  

Assessment of Oxygen Concentration Unit from Measured Oxygen Activity by Oxygen Sensor Based on Metallurgical Thermodynamics

作　　者：杨学民[1] 史成斌[1,2] 张盟[1,2] 李道明[3] 

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190 [2]北京科技大学冶金与生态工程学院,北京100083 [3]山西太钢不锈钢股份有限公司品质部,山西太原030003

出　　处：《过程工程学报》2011年第1期85-90,共6页The Chinese Journal of Process Engineering

摘　　要：对比分析了以上海贺利氏电测骑士有限公司生产的Celox钢液定氧探头测量的氧活度和文献中报道的氧活度、LF精炼过程中基于[Al]-[O]平衡计算的铝镇定钢液的氧活度及顶底复吹转炉冶炼终点基于[C]-[O]平衡计算的氧活度.结果表明,该探头测量的氧活度是以1%溶液为标准态,百万分之一氧([10-6O])为浓度单位,而不是冶金热力学中以氧的质量百分含量([%O])为浓度单位定义的氧活度.因此,选用氧的质量百分含量[%O]时,Celox钢液定氧探头测量的氧活度量纲应为10-4,而不是其探头仪表显示的10-6.Taking Celox s oxygen sensor from Heraeus Electro-Nite Shanghai Company Limited as an example,the measured oxygen activity by the sensor has been compared with the reported oxygen activity from literatures,the calculated oxygen activity of aluminum-killed molten steel during a 210 t LF refining process based on [Al]-[O] equilibrium and the calculated oxygen activity of molten steel at steelmaking end-point in an 80 t top-bottom combined blown converter based on [C]-[O] equilibrium.The comparison results show that the measured oxygen activity from Celox oxygen sensor as a representative of commercial oxygen sensors is based on 1%（ω） solution as standard state and one part per million,[10-6 O] as oxygen concentration unit,but not 1%（ω）,[%O] as oxygen concentration unit.Therefore,the magnitude of measured oxygen activity by the sensor must be treated as 10-4,rather than the displayed 10-6 in the display device of Celox oxygen sensor under the condition of applying 1%（ω）,[%O] as oxygen concentration unit.

关 键 词：氧活度 钢液定氧探头 氧浓度单位 冶金热力学 Celox钢液定氧探头 

分 类 号：TF701.3[冶金工程—钢铁冶金]