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CO Reactivity and Porosity of Manganese Materials

机译：锰材料的CO反应性和孔隙率

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In the production of manganese alloys there is a continuing effort to utilize all raw materials. As ore fines cannot be directly added to the furnace, the fines must be agglomerated to sinter, pellets or briquettes. However, as the materials changes properties during agglomeration, there is a need to know how the effect the agglomerated material affects the furnace performance, compared to lumpy material. In this paper the CO reactivity and porosity of 3 ores and their agglomerates of sinter and pellets is studied.In the furnaces, the higher manganese oxides (MnO_(2), Mn_(2)O_(3), Mn_(3)O_(4)) are reduced to MnO with CO gas, producing CO_(2). If the CO reactivity is low, the CO_(2) may be produced above 800°C triggering the Boudouard reaction, which increases the total carbon and energy consumption. Hence, a high CO reactivity is beneficial for the process.The present work combines the study of CO reactivity and porosity of eight different manganese materials. It is shown that manganese materials with high initial porosity have high CO reactivity. This means that Gabonese ore and CVRD ore will have a higher CO reactivity compared to their sinter and pellets. For Assmang ore, which has a low initial porosity, making an agglomerate with higher porosity, will increase the CO reactivity. The additional carbon consumption per ton of produced metal was also calculated for the materials investigated.
机译：在锰合金的生产中，一直在努力利用所有原材料。由于无法将细粉直接添加到熔炉中，因此必须将细粉团聚成烧结矿，球团或团块。然而，随着材料在附聚过程中改变性质，与块状材料相比，需要知道附聚材料的效果如何影响炉性能。本文研究了3种矿石及其烧结矿和球团矿的CO反应性和孔隙率。在熔炉中，高锰氧化物（MnO_（2），Mn_（2）O_（3），Mn_（3）O_（ 4））用CO气体还原为MnO，生成CO_（2）。如果CO反应性较低，则在800°C以上可能会生成CO_（2），从而触发Boudouard反应，从而增加了总碳和能量消耗。因此，高的CO反应性对该工艺是有益的。本工作结合了对八种不同锰材料的CO反应性和孔隙率的研究。结果表明，具有高初始孔隙率的锰材料具有较高的CO反应性。这意味着与烧结矿和球团矿相比，加蓬矿石和CVRD矿石将具有更高的CO反应性。对于初始孔隙度低的阿斯芒（Assmang）矿石，制造具有较高孔隙度的团聚体将提高CO反应性。还针对所研究的材料计算了每吨所生产金属的额外碳消耗。

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