一种利用赤泥制备金属化球团的方法及系统

Method and system for preparing metallized pellet through red mud

Abstract

本发明公开了一种利用赤泥制备金属化球团的方法及系统。该方法包括如下步骤:将赤泥、氧化钙、80℃~100℃的热水混合均匀,对赤泥进行洗涤;将洗涤后的赤泥进行沉降、过滤,获得含水赤泥和滤液;将含水赤泥进行干燥,获得干燥赤泥;将干燥赤泥与还原煤混合、成型,获得球团;将球团干燥后进行直接还原,获得金属化球团。本发明通过在赤泥洗涤过程中加入氧化钙,不仅可以促进赤泥的沉降,还有利于后续赤泥的直接还原工艺。
The invention discloses a method and system for preparing metallized pellet through red mud. The method comprises following steps: red mud, calcium oxide and hot water at the temperature of 80 DEG C to 100 DEG C are mixed evenly, and red mud is washed; the washed red mud is subject to sedimentation and filtering, and red mud containing water and filtrate are obtained; the red mud containing water is dried, and dried red mud is obtained; the dried red mud and reduction coal are mixed and formed, and the pellet is obtained; the pellet is dried and then is subject to direct reduction, and the metallized pellet is obtained. The calcium oxide is added in the red mud washing process, sedimentation of the red mud is promoted, and the subsequent direct reduction process of the red mud is facilitated.

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