Abstract

The NO_x in the exhaust gas emitted from the coke combustion and sintering process has a serious impact on the environment. How to reduce the release of NO_x in the combustion of coke has become a major problem to be solved. Adding a certain amount of catalyst to the coke combustion process can not only effectively improve the combustion efficiency of coke but also reduce the NO_x emissions. In this paper, CeO₂ is used as an inhibitor for coke combustion experiments, micro-sintering experiments and sintering cup experiments, focusing on the effect of CeO₂ on NO_x emissions during the coke combustion and sintering process. It is found that in the coke combustion reaction the addition of 1 and 2% CeO₂ resulted in NO_x reduction of 5.6 and 2.5%. The addition of 3% CeO₂ resulted in a 2.8% increase in NO_x emissions. When the amount of CeO₂ added was 2%, the NO reduction rate during the sintering cup test reached 25.3%. At the same time, the addition of 2% CeO₂ resulted in little change in the yield of the sinter, and the increase of the drum strength of the sinter.

中文翻译：

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焦炭燃烧烧结过程中NO x排放降低的研究

摘要

焦炭燃烧和烧结过程中排放的废气中的NO _x对环境有严重影响。如何减少焦炭燃烧中NO _x的释放已成为需要解决的主要问题。加入一定量的催化剂，以焦炭燃烧过程，不仅可以有效地提高焦炭的燃烧效率又降低了NO _X排放物。本文将CeO ₂用作焦炭燃烧实验，微烧结实验和烧结杯实验的抑制剂，重点研究CeO ₂对NO _x的影响。焦炭燃烧和烧结过程中的废气排放。发现在焦炭燃烧反应中添加1％和2％的CeO ₂导致NO _x减少5.6％和2.5％。加入3％的CeO ₂导致NO增加2.8％_X的排放。当CeO _2的添加量为2％时，在烧结杯试验期间的NO还原率达到25.3％。同时，添加2％的CeO ₂导致烧结体的收率几乎没有变化，并且烧结体的鼓强度增加。