安钢高炉喷吹煤粉系统 ,由于自动控制数学模型精度低 ,一直未能很好地实现自动喷吹 ,喷煤量波动较大 ,严重地影响了高炉炉况顺行和喷煤水平的提高。通过对现场采集的大量实验数据进行整理、分析与研究 ,提出喷煤量分别与罐压、补气量之间的可能关系 ,建立其在三维情况下的数学模型 ,在MATLAB环境下 ,作出其三维拟合曲面。利用二元回归方程计算结果与实测值进行比较 ,判断三维数学模型的显著性 Anyang blast furnace pulverized coal injection system, due to the low accuracy of automatic control of mathematical models, has not been able to achieve good automatic injection, pulverized coal injection volume fluctuations, seriously affecting the blast furnace furnace along the line and improve the level of PCI. Through the collation, analysis and research on a large amount of experimental data collected in the field, the possible relationship between the amount of coal injected and the amount of tank pressure and gas supplement is proposed, and the mathematical model of the three-dimensional model is established. Under MATLAB environment, Fitting the surface. Using the binary regression equation calculated results and measured values ​​were compared to determine the significance of three-dimensional mathematical model