为研究球团添加菱镁石熔剂对焙烧工艺制度的影响，在实验室条件下，将菱镁石熔剂添加到普通酸性球团中，利用傅立叶导热微分方程推导了球体不稳定导热微分方程，采用有限差分求解方法解析了菱镁石熔剂对球团传热过程的影响。分析结果表明：在相同焙烧条件下，普通酸性球团完成焙烧的时间为8.35 min，添加菱镁石熔剂的球团为9.13 min。建议在生产含氧化镁的酸性球团时，应适当提高预热段温度使熔剂中碳酸盐充分分解或适当延长焙烧时间，以实现球团的合理焙烧。
The effect of magnesite addition in acid pellet on roasting process parameters was studied in laborafory. A balltype unsteady conduction differential equation was developed based on Fourier equation and the effect of magnesite addition on pellet heat transfer was analyzed according to finite difference. It was shown that the roasting time of pellets with and without magnesite addition was 9.13 minutes and 8.35 minutes respectively, and it is suggested that the preheating temperature should be increased to make carbonate decomposed fully or the roasting time should be enlongated to realize reasonable roasting.
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