Modification mechanism of caking and coking properties of Shenmu subbituminous coal by low-temperature rapid pyrolysis treatment

Liu, Xiang-chun; Fang, Bin; Zhao, Zhigang; Xie, Ruilun; Zhao, Lei; Ling, Qiang; Cui, Ping

doi:10.1007/s42243-019-00261-7

Cited by 16 publications

(6 citation statements)

References 21 publications

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“…Sheng [30] held the idea that the ordering degree of coal sample could be measured by the values of A D3+D4 /A G and A G /A All , where A i is the area corresponding to band i. It was also found in previous analysis that there was positive correlation (negative correlation) between the ordering degree of coal and the values of A G /A All (the values of A D3+D4 /A G ) [31]. These Raman spectra parameters of the five samples are listed in Table 5.…”

Section: Physical and Chemical Characteristicsmentioning

confidence: 84%

Experimental research on semi-coke for blast furnace injection

Huang

Ning

Wang

et al. 2020

J. Iron Steel Res. Int.

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The combustion properties and grindability of Shenmu low-rank coal (SM) and its four different semi-cokes were studied by the self-designed equipment and Hardgrove method. The four semi-cokes were obtained under the pyrolysis temperature of 400, 500, 600 and 700 °C, named as SM-400, SM-500, SM-600 and SM-700, respectively. The analyses of nitrogen adsorption, Fourier-transform infrared spectroscopy (FTIR) spectra and Raman spectra were carried out to explain the change in combustion ratio and grindability. The result showed that the specific surface area of samples had an essential effect on the combustion ratio of SM-400 and SM-500. Meanwhile, the grindability depended on the strength of coal matrix, and the augment of pore amounts would increase the grindability. The functional groups and graphitization degree of the same sample were identical with the combustion ratio. With the pyrolysis upgrading temperature increasing, the combustion ratio of sample decreased, corresponding to the decrease in the benzene ring and the increase in graphitization degree. In addition, the thermogravimetric analysis was carried out, and the result was compared against what was shown in the data of combustion ratio. For pulverized coal injection, the combustion ratio was more intuitive and more accurate than combustibility.

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Section: Physical and Chemical Characteristicsmentioning

confidence: 84%

Experimental research on semi-coke for blast furnace injection

Huang

Ning

Wang

et al. 2020

J. Iron Steel Res. Int.

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“…Isothermal combustion enables the analysis of the fuel combustion process at high temperatures, but the static interparticle reaction differs from an actual blast furnace where combustion takes place in a kinetic environment. Before isothermal combustion, the fuel has to go through heat treatment, and many studies [27][28][29] have shown that the composition, pore structure, and microcrystalline structure of carbon undergo a series of complex changes during heat treatment. The changes in composition are mainly due to the almost-complete precipitation of volatiles in the high-temperature inert atmosphere, which eliminates their contribution to the combustion performance of the fixed carbon.…”

Section: Isothermal Combustionmentioning

confidence: 99%

Comparison of isothermal and nonisothermal combustion methods when evaluating semicoke for pulverized coal injection of blast furnace

Zou

Zhao

et al. 2022

Asia-Pacific J Chem Eng

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Using semicoke instead of anthracite for pulverized coal injection (PCI) in a blast furnace can greatly reduce the cost of iron making, but the combustion performance of semicoke first needs to be accurately predicted. In this study, the combustion performances of different fuels were compared and analyzed in a drop tube furnace (DTF) and under isothermal and nonisothermal conditions. The results showed that semicoke had a better combustion performance than coal in the DTF. Isothermal combustion provided a more consistent performance evaluation of the fuels because the effect of volatiles was eliminated. Nonisothermal combustion significantly differed from the DTF results because of the influence of volatiles; after the fuels received high‐temperature treatment for devolatilization, the combustion performance was consistent with the DTF results. The influencing factors for the fuel combustion performance differed according to the combustion conditions. For the DTF, the burnout rate was correlated with the pore structure and microcrystalline structure, especially the latter. For isothermal combustion, the combustion characteristic parameter and microcrystalline structure d002 and Lc after high‐temperature treatment were strongly correlated. For nonisothermal combustion, the combustion characteristic parameters were strongly correlated with the volatile content. The above results can serve as a reference for evaluating the combustion performance of different fuels in a blast furnace using PCI.

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“…Through the step-by-step utilization of coal thermal conversion products, the efficient output of tar, pyrolysis gas, and semicoke with medium-and low-temperature pyrolysis as the core is realized, which is one of the important means of high-efficiency and clean coal conversion. 7 As a kind of coal, tar-rich coal has a tar yield of more than 7%, a strategic mineral resource combining kerosene and gas properties. The biggest feature of tar-rich coal is the side chain and bridge bond rich in aliphatic hydrocarbon structure, and the aliphatic hydrocarbon structures are weak bond structures attached to the aromatic combustion nuclei of coal condensation.…”

Section: Introductionmentioning

confidence: 99%

“…These traditional utilization methods have related problems, such as high carbon emission, low energy conversion efficiency, and serious pollution emission. , Compared with single conversion methods, such as coal gasification and liquefaction, coal classification conversion technology embodies the step-by-step utilization of resources. Through the step-by-step utilization of coal thermal conversion products, the efficient output of tar, pyrolysis gas, and semicoke with medium- and low-temperature pyrolysis as the core is realized, which is one of the important means of high-efficiency and clean coal conversion …”

Section: Introductionmentioning

confidence: 99%

Catalytic Fast Pyrolysis of Tar-Rich Coal with a Bauxite Residue for Upgrading High-Value Products: Product Distribution and Kinetic Analysis

Shang,

Guo,

Yang

et al. 2024

ACS Omega

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Modification mechanism of caking and coking properties of Shenmu subbituminous coal by low-temperature rapid pyrolysis treatment

Cited by 16 publications

References 21 publications

Experimental research on semi-coke for blast furnace injection

Experimental research on semi-coke for blast furnace injection

Comparison of isothermal and nonisothermal combustion methods when evaluating semicoke for pulverized coal injection of blast furnace

Catalytic Fast Pyrolysis of Tar-Rich Coal with a Bauxite Residue for Upgrading High-Value Products: Product Distribution and Kinetic Analysis

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