AOD精炼304不锈钢渗氮、脱氮的计算模型与应用

Calculating Model for Nitriding and Denitriding of Stainless Steel 304 in AOD Refining and Its Application

研究了AOD精炼304不锈钢过程中的渗氮和脱氮行为,建立了渗氮和脱氮计算模型。AOD渗氮模型在120 t AOD装置的验证结果显示,剔除异常数据后,氧化3期氮含量计算值与实测值之间的绝对误差在±100×10^(-4)%之间的约占总炉数的85%;还原期和脱硫期AOD脱氮模型计算结果与实测值之间的绝对误差在±100×10^(-4)%之间的约达到80%以上,AOD脱硫期的氮含量命中精度约为90%。

Based on the study on behavior of nitriding and denitriding of stainless steel 304 in AOD refining process, the calculating models for nitriding and denitriding of steel in AOD process have been established. The verified results for the AOD nitriding model by 120 t AOD unit refining show that after picking out the error data, in oxidation third-period the percentage for absolute error of nitrogen content in steel less than 100×10^-4% between measured and calculated values is up to 85% ; and for the AOD denitriding model, in reduction period and desulphurization period the percentage for that less than 100 ×10^-4% between measured and calculated values is above 80%, and the aim ratio of nitrogen content in steel in AOD desnlphurization period is about 90%.