Assessment of Oxygen Concentration Unit from Measured Oxygen Activity by Oxygen Sensor Based on Metallurgical Thermodynamics
YANG Xue-min SHI Cheng-bin ZHANG Meng LI Dao-ming
Institute of Process Engineering，Chinese Academy of Sciences Institute of Process Engineering，Chinese Academy of Sciences Institute of Process Engineering，Chinese Academy of Sciences Quality Control Department, Shanxi Taigang Stainless Corporation Limited
Abstract：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%(w) solution as standard state and one part per million, [10-6 O] as oxygen concentration unit, but not 1%(w), [%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%(w), [%O] as oxygen concentration unit.
杨学民 史成斌 张盟 李道明. 基于冶金热力学的钢液定氧探头氧浓度单位确定[J]. , 2011, 11(1): 85-90.
YANG Xue-min SHI Cheng-bin ZHANG Meng LI Dao-ming. Assessment of Oxygen Concentration Unit from Measured Oxygen Activity by Oxygen Sensor Based on Metallurgical Thermodynamics. , 2011, 11(1): 85-90.
2011, Vol. 11 
