球团添加菱镁石熔剂对焙烧工艺制度的影响

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 。
关键词 : 炼铁 ; 球团 ; 菱镁石

Study on Effect of Magnesite on Pellet Roasting Parameters
ZHOU Ming2shun1 , 　ZHAI Li2wei1 , 　L IU Wan2shan1 , 　SHAN G Ce2 , 　REN Wei1
(1. Angang Steel Company Limited Technology Cent re , Anshan 114009 , Liaoning , China ;
2. Angang Steel Company Limited Iron2making Plant , Anshan 114009 , Liaoning , China)
Abstract : The effect of magnesite addition in acid pellet on roasting process parameters was studied in laborafory. A
ball2type unsteady conduction differential equation was developed based on Fourier equation and the effect of magne2
site addition on pellet heat t ransfer was analyzed according to finite difference. It was shown that the roasting time of
pellet s 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.
Key words : ironmaking ; pellet ; magnesite
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