论文部分内容阅读
为提高无钟高炉炉喉料面的预测精度,建立了考虑炉料运动的炉料分布数学模型.在分析炉料运动的基础上,指出了炉料运动是影响炉料堆积过程的重要因素,采用尺寸比1∶10的无钟布料器模型试验分析了不同炉料分速度对炉料堆积行为的影响,建立了考虑炉料运动因素的料堆轮廓预测模型,并通过数值方法确定了料堆的位置和料面轮廓曲线,应用于料面形状的预测.结果表明:炉料的运动是造成料堆两侧堆积角差异、料堆横截面面积变化以及料面轮廓改变的重要原因,料堆轮廓采用直线段和曲线相结合的方式进行构造,炉料的堆积角和曲线过渡区域长度作为重要的模型参数均考虑了炉料速度的影响,模型构造的轮廓接近真实料堆形状,应用该模型实现了炉喉料面的准确预测.
In order to improve the predicting accuracy of furnace throat surface without bell blast furnace, a mathematical model of charge distribution considering burden movement is established.Based on the analysis of charge movement, it is pointed out that charge movement is an important factor affecting load accumulation process, 10 bell-less model tests were conducted to analyze the effect of different charge rates on the charge accumulation behavior. A prediction model of the charge pile contour considering load factor was established. The position of the pile and the profile curve of the material surface were determined by numerical method. Which is used to predict the shape of the material surface.The results show that the movement of the material is an important reason for the difference of the pile angle on both sides of the material pile, the change of the cross-sectional area of the material pile and the change of the material surface profile. Mode, the stacking angle of charge and the length of curve transition region are considered as important model parameters. The contour of the model structure is close to the shape of the real material pile. Using this model, the accurate prediction of the material surface of the furnace throat is realized.