Abstract
高炉灰是炼铁工艺的主要副产品，通过转底炉法处理高炉灰可以有效的回收这种废弃物。本文用两种高炉灰与澳精粉混合制备成含碳球团，全文通过煤粉与澳精粉制备的含碳球团进行对比，研究不同碳氧比对还原行为的影响，结果表明：随着碳氧比的升高，三种含碳球团金属化率均增大，但是金属化率的大小始终未煤粉球团 > 布袋灰球团 > 重力灰球团。三种球团的抗压强度和体积收缩都随着碳氧比的增加而降低。运用高炉灰与澳精粉制备金属化球团是可行的，具有很高的环保意义和应用前景。 Blast furnace ash is the main by-product of iron making process. It can effectively recover this kind of waste by treating blast furnace ash by turning furnace. In this paper, two kinds of blast furnace ash and Australian powder were prepared and mixed with carbon pellets. The effects of different carbon and oxygen ratios on the reduction behavior were studied by comparing the carbon pellets prepared by pulverized coal and Australian powder. The results showed that with the increase of carbon and oxygen ratio, the metallization rate of the three kinds of carbon pellets increased, but the size of the metallization rate was not always pulverized coal pellets > bag gray pellets > gravity gray pellets. The compressive strength and volume shrinkage of the three pellets are reduced with the increase of the carbon-oxygen ratio. The use of blast furnace ash and Australian powder to prepare metallized pellets is feasible and has a high environmental significance and application prospects.
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