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采用二次旋转组合设计法在实验室中研究了焙烧温度,BaCO_3、石灰、白云石和蛇纹石添加量等五因素在较大范围内变化时球团矿性质的变化情况。介绍了等温焙烧条件下球团矿冷抗压强度(C)和孔隙率(P)的测定结果,重要的特性和变化规律均用图表示出。给出试验设计及试验结果的统计分析,最后得出详细的经验数学模型。球团矿性质的等值曲线表明:焙烧温度是起支配作用的因素,随焙烧温度的增加,C值增大,P值减少;石灰起重要作用,它也使C值增大,P值减少;BaCO_3和白云石亦有类似的影响,但作用次之;蛇纹石添加有较小的负相关性,它使C值降低,P增大。讨论了温度和石灰及其它因素之间的重要交互作用。最后列出为检验所得数字模型的有效性而做的验证试验的结果。
In the laboratory, the change of the pellet properties under five factors of calcination temperature, BaCO 3, lime, dolomite and serpentine addition were studied in the laboratory by the method of double rotation combination design. The results of the determination of cold compressive strength (C) and porosity (P) of pellets under isothermal calcination are presented. The important characteristics and the changing rules are shown graphically. The statistical analysis of experimental design and experimental results is given, and finally a detailed empirical mathematical model is obtained. The equivalent curve of the pellet properties shows that the calcination temperature is the dominant factor. As the calcination temperature increases, the C value increases and the P value decreases. Lime plays an important role. It also increases the C value and decreases the P value ; BaCO 3 and dolomite also have similar effects, but the effect is followed; serpentine addition has a smaller negative correlation, which decreases the C value and P increases. The important interactions between temperature and lime and other factors are discussed. Finally, the results of the verification tests done to verify the validity of the resulting digital model are presented.