Carbonization of Coals Mixed Iron Ore Fines and Gasification of Resulting Iron Coke with CO2: Transformation of Iron Minerals and Coke Properties

Zhang, Shengfu; Liu, Wei; Qiu, Shuxing; Yang, Mingrui; Li, Manjie

doi:10.1007/978-3-319-48191-3_65

Cited by 2 publications

(5 citation statements)

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“…In addition, the samples were scanned at 4°/min over an angular range of 10–90°, with a scanning interval of 0.02°/step. The broad 2θ peak ranging from 10 to 50° was fitted using three Gaussian peaks (20, 26, and 43°), representing the γ band, π band (002), and 100 peak, respectively . Then, the resultant peak position, intensity, area, and full width at half-maximum (fwhm) were determined.…”

Section: Methodsmentioning

confidence: 99%

“…The broad 2θ peak ranging from 10 to 50° was fitted using three Gaussian peaks (20, 26, and 43°), representing the γ band, π band (002), and 100 peak, respectively. 12 Then, the resultant peak position, intensity, area, and full width at half-maximum (fwhm) were determined. In this study, the aliphatic carbon ( C al ) and aromatic carbon ( C ar ) were calculated using the γ and π band (002) areas, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The relative contents of the minerals in the iron coke were analyzed using a method for the quantitative analysis of the minerals in coal and coke (Table 5). 21 The relative contents of the quartz minerals, mullite, and sillimanite decrease with an increasing Fe 2 O 3 addition. The relative contents of pyrrhotite and metallic iron increase gradually with an increasing Fe 2 O 3 addition.…”

Section: Iron Coke Propertiesmentioning

confidence: 96%

“…The quantitative analysis of the minerals in the iron coke samples was carried out using a method for the quantitative analysis of minerals in coal and coke. 21 This method is based on the theory of Rietveld refinement and usually uses a variety of mathematical models to simulate the XRD spectrum of the coke. In the calculations, the relative coke content, which is shown in the XRD spectrum, and suitable mathematical models of the coke were chosen to ensure the best match between the simulated and actual patterns.…”

Section: Roman Structure Analysismentioning

confidence: 99%

“…The addition of iron ore could improve the reaction rate of the coke gasification and reduce the initial temperature of the gasification reaction and coke strength . In a previous study, we have investigated the influences of iron ore powder on the properties and microscopic properties of iron coke and found that the reactivity of iron coke is negatively correlated with the crystalline structure of the carbon, but it is only weakly correlated with the pore structure and specific surface area. Furthermore, the addition of iron ore powder could reduce the crystalline structure parameters of iron coke, thus enhancing the reactivity of iron coke.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Fe₂O₃ on the Properties and Structure of Iron Coke

Qiu,

Yu,

Chen

et al. 2023

ACS Omega

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Iron cokes were produced in an electrical furnace from a coal blend containing varying levels of added Fe 2 O 3 . The effects of Fe 2 O 3 on the properties and structure of the iron coke were then investigated using the coke for metallurgy determination of mechanical strength, determination of coke reactivity and coke strength after the reaction, X-ray diffraction, Raman spectroscopy, and a method for quantitative analysis of the minerals in coal and coke. Further, the relationships between the properties and structures of iron coke samples were established. The results show that the addition of Fe 2 O 3 can reduce the tumble strength, coke strength after the reaction, aromaticity, microcrystalline size, graphitization degree, crystalline volume, and carbon order degree of the iron coke and increase the abrasion resistance, coke reactivity index, and pulverization rate. Moreover, the degree of influence increases with increasing levels of added Fe 2 O 3 . The Fe 2 O 3 is mainly transformed into metallic iron during the coking process, and part of metallic iron is converted into Fe 3 O 4 during iron coke gasification. With an increasing Fe 2 O 3 content, the trend of the change in the minerals from Fe to Fe 3 O 4 becomes much more obvious, resulting in deeper influences on the iron coke thermal properties. There are obvious correlations among the iron coke reactivity and iron coke strength after the reaction and the crystalline volume, carbon order degree, and metallic iron content. It is concluded that the addition of Fe 2 O 3 decreases the crystalline volume and carbon order degree and increases the metallic iron content, resulting in increases in abrasion resistance and coke reactivity and decreases in tumble strength and coke strength after the reaction.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Iron Coke Propertiesmentioning

confidence: 96%

Section: Roman Structure Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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