Mechanisms of composite agglomeration of fluoric iron concentrate
来源期刊：中南大学学报(英文版)2010年第6期
论文作者：姜涛 胡友明 李骞 李光辉 杨永斌 张元波 郭宇峰
文章页码：1190 - 1195
Key words：fluoric iron concentrate; sintering; composite agglomeration process; mechanism
Abstract: The effect of composite agglomeration process (CAP) on fluoric iron concentrates sintering was investigated. The yield and quality of the sinter are greatly improved when using CAP assisted with heat airflow and enhancing magnesium oxide (MgO) contents. For conventional sintering of fluoric iron concentrate, due to lower viscosity of binding phase and higher fluidity of liquid phase, the sinter is formed with large thin-walled holes and the strength of the sinter is deteriorated consequently. The novel process forms composite agglomerate in which acid pellets are embedded in basic sinter. The pellets are solid with interconnecting crystals of hematite (Fe2O3) and magnetic (Fe3O4). For basic sintering, after adding MgO, the viscosity of the melting phase increases and the fluidity decreases; and calcium and aluminum silico-ferrites and magnesium ferrite are formed with perfect crystals and good sintering microstructure.
