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首页> 外文期刊>Ironmaking & Steelmaking >A laboratory-based investigation into the catalytic reduction of NOx in iron ore sintering with flue gas recirculation
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A laboratory-based investigation into the catalytic reduction of NOx in iron ore sintering with flue gas recirculation

机译：基于实验室的烟气再循环催化还原铁矿石烧结过程中NOx的研究

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The catalytic reduction behaviours between NOx and CO in sinter zone were studied as using flue gas recirculation (FGR). Minerals in sinter can act as catalysts during NOx reduction. The catalytic activity of minerals has the order of calcium ferrite > kirschsteinite > fayalite. The catalytic procedure includes two steps: iron-bearing minerals are reduced to lower valence oxides by CO, and then NO is reduced to N-2 by lower valence oxides. Improving the generation amount of calcium ferrite, especially acicular-type silico-ferrite of calcium and aluminium (SFCA), contributes to significantly reinforcing the catalytic performance between NO and CO. As the basicity of sinter increases to 2.2, it enables to generate maximum amount of acicular-type SFCA which has larger specific surface areas, therefore facilitates decreasing NOx emission during FGR sintering.
机译：利用烟气再循环（FGR）研究了烧结区NOx和CO之间的催化还原行为。烧结矿中的矿物质可以在NOx还原过程中充当催化剂。矿物质的催化活性依次为铁酸钙>克氏铁矿>铁橄榄石。催化过程包括两个步骤：将含铁矿物质通过CO还原为低价氧化物，然后将NO通过低价氧化物还原为N-2。改善铁酸钙的生成量，特别是针状钙铝硅铁酸盐（SFCA），有助于显着增强NO和CO之间的催化性能。随着烧结碱的增加到2.2，它可以产生最大量因此，具有较大比表面积的针状SFCA的制备有利于减少FGR烧结期间的NOx排放。

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