Effect of ammonia injection stages and segregation degrees on the characteristics of iron ore sintering process

Wang, Jiankang; Meng, Hanxiao; Liu, Xiang; Jin, Kelang; Zhang, Lei; Zhou, Hao

doi:10.1016/j.fuel.2023.128998

Cited by 1 publication

(4 citation statements)

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“…The typical indexes of the high-temperature zone, including peak temperature ( T p ), average temperature above 1100 °C ( T a ), duration time of melting temperature (DTMT), and melting quantity index (MQI) were calculated through the temperature profiles of the sintering bed. The detailed definition and calculation method of the typical indexes refer to our previous research …”

Section: Resultsmentioning

confidence: 99%

“…The real-time combustion efficiency ( E t ) and average combustion efficiency ( E a ) of the sintering process were calculated to profoundly investigate the coupling mechanism of coke and ammonia. The calculation method refers to our previous research …”

Section: Resultsmentioning

confidence: 99%

“…The detailed definition and calculation method of the typical indexes refer to our previous research. 44 Figures 2 and 3 depict the sintering bed temperature profiles and high-temperature indexes for various concentrations of ammonia injection. Under different concentrations of ammonia injection, the values of T p and T a , DTMT, and MQI are higher compared to the case without ammonia addition.…”

Section: Effect Of Additional Ammonia Injection On Flamementioning

confidence: 99%

“…The calculation method refers to our previous research. 44 Due to the unstable combustion in the ignition stage and the initial sintering stage, the stage from 3 min after the beginning to the end was selected for comparative analysis. The CO emission and E t under different ammonia injection concentrations are shown in Figure 8.…”

Section: Effect Of Additional Ammonia Injection On Combustion Efficie...mentioning

confidence: 99%

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Effect of Ammonia Injection on the Iron Ore Sintering Process: Reducing Fossil Fuel Consumption and Carbon Emissions

Wang,

Meng,

Liu

et al. 2023

Energy Fuels

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The experiment involving ammonia injection was conducted to minimize solid fuel consumption and carbon emissions during the sintering process of iron ore. The sintering bed temperature, sintered ore quality, combustion efficiency, and pollutant emission under different ammonia injection concentrations and coke ratios were investigated. The experimental findings indicate that the injection of ammonia has a positive impact on the thermal mode of the sintering bed, leading to an increased yield of sintered ore and an improved tumbler index. Additionally, ammonia injection enhances the fuel combustion efficiency and reduces CO emissions. Compared with the traditional case that without ammonia injection, the yield under 1.5% vol ammonia injection increased from 63.69 to 74.78%, the tumbler index increased from 54.9 to 60.7%, and the average combustion efficiency increased from 89.42 to 93.42%. Under 1.0% vol ammonia injection, it is possible to decrease the coke ratio from 4.5 to 3.5% without weakening the sintered ore quality and the solid fuel consumption ratio and carbon emissions can be reduced by 22.2%.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Additional Ammonia Injection On Flamementioning

confidence: 99%

Section: Effect Of Additional Ammonia Injection On Combustion Efficie...mentioning

confidence: 99%

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