应用炉气分析预测转炉吹炼终点碳含量

应用炉气分析预测转炉吹炼过程中熔池碳含量的变化,并对吹炼终点时的碳含量和脱碳速率、氧枪枪位的关系进行了研究,得出如下结论:(1)碳积分模型只适合入炉原料数据准确的情况下,对终点碳含量进行预测;(2)吹炼末期,碳含量和脱碳速率的关系可用三次方函数描述;(3)为排除枪位对数据拟合的影响,对于恒压变枪位吹炼,在不同的枪位下调整三次方模型参数,即可实现对终点高、中、低碳含量进行预测.

Carbon content prediction at blowing end-point of converter with off-gas analysis

The carbon content of bath is predicted from off-gas analysis in blowing process, and the relations of carbon content at end-point with decarbonization rate and lance position are investigated arriving at the following conclusions: (1)the end-point carbon content can predict by carbon integral model only at such situation that reliable data of the input raw materials are available; (2) At the final blowing stage, the relation between carbon content and decarbonization rate can be described by cubic function; (3)In order to eliminate the influence of lance position, the cubic model parameters are adjusted at different lance position when the pressure of oxygen is constant, and thus the high, medium, and low carbon contents at end-point can all be predicted.