Effects of Adding Calcined Dolomite and Mill Scale to Sinter Mix on the Formation of NO and SO2 in Iron Ore Sintering Process

Cho, Seongkyu; Rocha, Leonardo Tomas da; Chung, Byung-Jun; Jung, Seung Boo

doi:10.1007/s11663-022-02504-7

Cited by 2 publications

(1 citation statement)

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“…NO x emissions decreased when a specially prepared coke containing CeO 2 was used during the iron ore sintering process [5]. The addition of Fe 3 O 4 , FeO and Fe can reduce the generation and emission of NO x in the sintering process [35,36]. Under certain conditions, the presence of CO seems to reduce NO x , and this reduction reaction is catalyzed by sintered ore, Fe 2 O 3 , Fe 3 O 4 and MgO [37,38].…”

Section: Introductionmentioning

confidence: 99%

Investigations into NOx Formation Characteristics during Pulverized Coal Combustion Catalyzed by Iron Ore in the Sintering Process

Wan

Chen

Zhou

et al. 2022

Metals

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Sintering accounts for about 50% of the total NOx emissions of the iron and steel industry. NOx emissions from the sintering process can be simulated using the emissions from coke combustion. However, the generation and emission law for NOx burning in the sintering process of pulverized coal is still not clear. The formation characteristics of NOx during coal combustion catalyzed by iron ore fines and several iron-containing pure minerals were studied in this paper. The results showed that iron ore fines can improve the NOx emission rate and increase the total NOx emissions during coal combustion. The type and composition of the iron ore fines have an important impact on the generation and emission of NOx in the process of coal combustion. The peak concentration and emissions of NOx in coal combustion flue gas with limonite, hematite or specularite added increased significantly. The peak value for the NOx concentration in the coal combustion flue gas with magnetite or siderite added increased, but the emissions decreased. Therefore, the generation of NOx in the sintering process can to a certain extent be controlled by adjusting the type of iron-containing raw materials and the distribution of the iron-containing raw materials and coal.

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Section: Introductionmentioning

confidence: 99%