连铸保护渣熔点与黏度模型及其预报效果比较

Models of melting point and viscosity of continuous casting mold flux and comparison of their prediction accuracy

连铸保护渣是连铸过程重要的辅助材料,其熔点和黏度等性能的测量耗时且贵,开发计算模型获取炉渣物理性质是发展方向之一。目前已建立了众多的保护渣熔点和黏度计算模型,但各模型都有其适用渣系及预测的不确定性,因此需要开展系统的分析和评价。结合文献中连铸保护渣渣系组成、熔点和黏度数据,考察了各模型的预报效果,得到了不同模型的适用范围及其预测相对误差范围。结果表明:各计算模型都有一定的适用性和局限性,熔点计算模型平均误差可以小于10%,黏度计算模型平均误差可达到30%~35%,对进一步提高模型精度提出了发展建议。

Continuous casting mold powder is an important auxiliary material in continuous casting process.The measurement of its melting point and viscosity is time-consuming and expensive.The establishment of calculation model to obtain slag physical properties is one of the development directions.Many models for calculating melting point and viscosity of mold powder have been established.However,each model has its applicable slag system and prediction uncertainty,so it is necessary to carry out systematic analysis and evaluation.Based on the composition,melting point and viscosity data of continuous casting mold flux in literature,the prediction effect of each model is investigated,and the applicable range and relative error range of different models are obtained.The results show that all the calculation models have certain applicability and limitations,the average error of melting point calculation model can be less than 10%,and the average error of viscosity calculation model can reach 30%-35%.Some suggestions are put forward to further improve the accuracy of the models.