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Decreasing NOx emission in sintering process is a key issue in steel industry. NOx emission in sintering process is decreased by coke combustion under high temperature. It has been investigated that coating layer of CaO–Fe2O3 composition on coke surface (CF coating method) is effective for decreasing NOx. It has been considered that CaO–Fe2O3 coating layer promotes high temperature combustion and functions as catalyst for reduction of nitrogen oxide.
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Katayama et al. (2016) studied this question.
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