复合造块法在难处理含铁资源中的应用新进展

New advances on application of composite agglomeration process in hard-to-treat iron-bearing mineral resources

铁矿粉复合造块法是中南大学开发的一种不同于传统烧结法和球团法的铁矿造块新方法。该法是通过将细粒含铁原料按现有造球工艺制备成酸性球团料,将剩余铁矿粉、熔剂、燃料按传统烧结制粒工艺制成高碱度基体料,然后再将这两种料混合后布于烧结机上联合焙烧,获得由酸性球团料嵌入高碱度基体料的人造复合块矿。复合造块法目前已成功应用于细粒磁铁精矿、赤铁精矿、含氟铁矿的高效造块。于2008年起在包钢实现工业化应用,并成功制备出了中低碱度的复合炼铁炉料。本文主要介绍了近年来复合造块法在难处理钒钛磁铁矿、镜铁矿、含铁粉尘、高硅铁精矿和高镁铁精矿中的应用新进展。

The composite agglomeration process of iron ore fines developed by the Central South University is a brand-new iron ore agglomeration method different from the traditional sintering method and pelletizing method. In view of the composite agglomeration process, the fine-grained iron-bearing raw materials are prepared into acid pellet materials according to the existing pelletizing process and equipment ,the remaining iron ore fines ,fluxes and fuels are made into high basicity matrix materials according to the traditional sintering nodulizing process ,and then these two kinds of materials are mixed and distributed into the sinter ma- chine for combined roasting, and thus the composite agglomerates of acid pellet materials inlaid with high basicity matrix materials are produced. The composite agglomeration process has been now successfully applied in high efficient agglomeration of fine-grained magnetite concentrate,hematite concentrate and fluoric iron ores. The industrial application of the process was realized in Baosteel in year 2008, and the medium and low basicity composite iron-making materials are produced successfully. The new advances on application of the composite agglomeration process in hard-to-treat vanadium titanium magnetite, speeularite ores,iron-bearing dust, high silica iron concentrate and high magnesia iron concentrate in recent years have been introduced in this paper.