Influence Mechanism of Lignite and Lignite Semi-coke Addition on Drum Strength of Coke

Song, Tian‐shun; Zhang, Jianliang; Wang, Guangwei; Wang, Haiyang; Xu, Runsheng; Pang, Qing-hai

doi:10.2355/isijinternational.isijint-2017-447

Cited by 16 publications

(18 citation statements)

References 19 publications

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“…Moreover, XRD can be used to characterize the crystal structure and quantitatively calculate the crystal structure parameters. The stacking height ( L c ), interlayer spacing ( d 002 ), and stacking layer number ( n ) of carbon crystallites of ICA with the addition of CTP can be calculated by the carbon 002 peak in the XRD patterns . It was said that a larger L c and n corresponds to a lower reactivity of ICA.…”

Section: Methodsmentioning

confidence: 99%

Influences of Coal Tar Pitch on Metallurgical Properties of Iron Carbon Agglomerates

Bao

Chu

Han

et al. 2019

steel research int.

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Utilization of iron carbon agglomerates (ICA) with high reactivity in blast furnace (BF) can reduce fuel ratio and carbon emission by decreasing the temperature of thermal reserve zone, which is considered to be an innovative technology for achieving low-carbon ironmaking. Herein, the influences of coal tar pitch (CTP) as binder on the metallurgical properties of ICA are investigated. The results show that the compressive strength of ICA is first enhanced from 1639 to 3168 N and then reduced to 2243 N with the ratio of CTP increasing from 0% to 11%. Meanwhile, the drum strength (I 600 10 ) of ICA is accelerated from 67.3% to 80.5% and then leveled off. In addition, the reactivity of ICA is mitigated from 65.6% to 58.1% first and then increased to 68.8%, while the post-reaction strength shows an inverse trend. When the ratio of CTP is 5-7%, the mechanical strength, reactivity, and post-reaction of ICA are all at a relatively better levels. For the ICA with adding CTP, the mechanical strength is dependent on the microstructure, pore volume, and specific surface area, whereas the variation of reactivity and post-reaction strength are relevant to the pore structure and carbon crystallites structure.

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Section: Methodsmentioning

confidence: 99%

Influences of Coal Tar Pitch on Metallurgical Properties of Iron Carbon Agglomerates

Bao

Chu

Han

et al. 2019

steel research int.

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“…Tengfei SONG, 1) Jianliang ZHANG, 1) Guangwei WANG, 1) * Haiyang WANG, 1) Runsheng XU, 2) Qinghai PANG 3) and Chuan WANG 4,5) 1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China. To evaluate the effect of carbonization conditions on the bamboo, the relationship between carbonization parameter and physicochemical characteristics was studied.…”

Section: Effect Of Carbonization Conditions On the Property And Strucmentioning

confidence: 99%

“…2,3) Even though the life of the scarce coking coal reserves may be prolonged, the injection material, especially bitumite coal and anthracite coal, cannot be expected to survive indefinitely. 4) Bamboo, a promising feedstock with high growth rate, wide distribution and easy propagation in China, is viewed as a replacement of fossil fuel. 5,6) However, due to its high oxygen content, low calorific value, and high moisture content as well as low grindability, [7][8][9] its application is limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbonization Conditions on the Property and Structure of Bamboo Char for Injection in Blast Furnace

et al. 2019

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“…Another approach is to chemical upgrade the coal by increasing its H/C ratio by solvent treatment. [3][4][5][6][7][8][9][10][11][20][21][22][23][24][25] Takanohashi et al treated different coals with 1-MN and obtained 1-MN soluble fractions. 7,32) This 1-MN soluble coal fraction was called coal-derived binder.…”

Section: Introductionmentioning

confidence: 99%

“…The coke strength is strongly dependent on the pore structure and the carbon matrix which are affected by both the coking coal characteristics and the carbonization conditions. 12,13,[20][21][22][23][24][25][26] Development of the pore and the carbon structure during the carbonization process depends on the softening, melting and re-solidification characteristics of the coal. It also depends on the heating rate, heating pattern of carbonization and the maximum coking temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbonization Heating Rate on the Tensile Strength of Cokes Prepared from Chemically Upgraded Low Rank Coals

et al. 2019

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In this study, effect of carbonization heating rate and solvent removal method on the tensile strength of cokes prepared from chemical upgraded coal samples was investigated. A low rank coal, L coal, was solvent treated at 420°C, 2 h with 1-methylnapthlene (1-MN) solvent. Upgraded coal samples were obtained by removing 1-MN from the solvent treated samples. Two different approaches were applied to remove 1-MN from the treated samples; washing with tetrahydrofuran (THF) and that with n-hexane (HEX). All upgraded samples were first pelletized under a mechanical pressure and time of 40 MPa and 10 min, respectively, and then carbonized at heating rate of 3, 10 or 25°C/min. Carbonized coke samples strength was measured as tensile strength (MPa). It was found that lower heating rate gave higher tensile strength irrespective of solvent removal method. This may be due to that lower heating rates allowed the coal upon heating to undergo softening, melting and re-solidification for longer time. n-HEX-washed upgraded samples showed higher strength than THF-washed ones when the same heating rates were applied. Surfaces of coke samples were observed by scanning electron microscopy (SEM) and it was found that pore development structures of cokes n-HEX-washed samples and those from THF-washed samples were different from each other. This difference may be responsible for that in the strength.

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Influence Mechanism of Lignite and Lignite Semi-coke Addition on Drum Strength of Coke

Cited by 16 publications

References 19 publications

Influences of Coal Tar Pitch on Metallurgical Properties of Iron Carbon Agglomerates

Influences of Coal Tar Pitch on Metallurgical Properties of Iron Carbon Agglomerates

Effect of Carbonization Conditions on the Property and Structure of Bamboo Char for Injection in Blast Furnace

Effect of Carbonization Heating Rate on the Tensile Strength of Cokes Prepared from Chemically Upgraded Low Rank Coals

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