褐铁矿的热分解特性及其对烧结过程的影响  

Thermal Decomposition Characteristics of Limonite and Their Influences on the Sintering Process

作　　者：潘文[1] 吴铿[1] 王文泽[1] 赵勇[1,2] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]首钢技术研究院,北京100041

出　　处：《东北大学学报（自然科学版）》2013年第9期1277-1281,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51274026);国家高技术研究发展计划项目(2009AA06Z105)

摘　　要：利用热重分析的方法对褐铁矿FMG粉（简称FMGF）在受热升温过程的热分解特性进行了详细的研究.结果表明：FMGF中的结晶水在200~400℃温度区间内即完成了分解挥发,这样可以改善烧结料层透气性,使料层上部热量有效传递到下部;分解其中的结晶水,就能减少褐铁矿中的结晶水分解对烧结固体燃料消耗和烧结热平衡影响.烧结杯试验和工业应用结果验证了热分解特性研究的结论：在高比例褐铁矿条件下,通过提高难熔矿配比,可改善烧结料层透气性,改善料层传热条件,最终降低烧结固体燃耗,提高烧结成品率.The thermal decomposition characteristics of FMGF were investigated by the thermolgravimetric analysis.The experimental investigation show ed that the decomposition of crystal w ater in FMGF completed w hen the temperatures w ere in the range of 200 ~ 400 ℃,w hich improved the gas permeability of the sintering layers that the heat from upper layers transferred to the low er layers effectively.The crystal w ater w as decomposed so that the effects of crystal w ater decomposition in the FMGF on the solid fuel consumption and energy balance w ere reduced.The conclusion made from the thermal decomposition analysis w as verified by the sintering pot tests and industrial application,w hich indicated that the rate of finial products of the sintering w as increased and the solid fuel consumption w as reduced under high proportion of limonite through increasing the proportion of iron ore fines w ith low assimilative capacity to improve the gas permeability of the sintering layers and the heat transfer.

关 键 词：烧结 褐铁矿 热分解特性 固体燃耗 利用系数 

分 类 号：TF046.4[冶金工程—冶金物理化学]