Research on the Post-reaction Strength of Iron Coke Hot Briquette Under Different Conditions

Wang, Hong-Tao; Chu, Mansheng; Wang, Wenwen; Zhao, Wei; Liu, Zhenggen; Tang, Jue; Ying, Ziwei

doi:10.1007/s11837-018-3036-4

Cited by 21 publications

(12 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main reason for this phenomenon is that the dissolution of carbon is much more at higher temperature due to the superior reaction rate. Additionally, the reaction rate of ICHB gasification is much greater than that of conventional coke according to the previous study …”

Section: Resultsmentioning

confidence: 72%

Investigation on Gasification Reaction Behavior and Kinetic Analysis of Iron Coke Hot Briquette under Isothermal Conditions

Wang

Chu

Guo

et al. 2018

steel research int.

Self Cite

View full text Add to dashboard Cite

Gasification reaction behavior of iron coke as well as kinetic parameters is extremely important for its quality evaluation and practical application in an actual blast furnace. However, there are few researches on the gasification behavior of iron coke, especially for iron coke hot briquette (ICHB) prepared by hot briquetting process. In this paper, the gasification reaction behavior of ICHB is experimentally investigated under isothermal conditions. Meanwhile, the kinetic analysis for the gasification process of ICHB and the related mechanism are carried out. The results demonstrate that the increase of the reaction temperature causes the significant rise of the carbon conversion rate and the reaction rate of ICHB, while the post‐reaction strength is evidently decreased. The size degradation of ICHB after reaction is increasingly serious as the reaction temperature goes up, and more pores as well as cracks are generated inside the gasified ICHB. During the gasification, the reduction of iron oxide, the oxidization of metal iron, and the generation reaction of fayalite are concomitantly occurred. The most probable mechanism function is confirmed. Based on this model, the activation energy and pre‐exponential factor are conducted, which are 144.77 kJ mol−1 and 999.37 min−1, respectively.

show abstract

Section: Resultsmentioning

confidence: 72%

Investigation on Gasification Reaction Behavior and Kinetic Analysis of Iron Coke Hot Briquette under Isothermal Conditions

Wang

Chu

Guo

et al. 2018

steel research int.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, the post-reaction strength of ferro-coke also reduced. With the increase of iron content in ferro-coke, the strength decreased more obviously after reaction [ 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Binders on the Crushing Strength of Ferro-Coke

Deng

Wang

et al. 2021

Materials

View full text Add to dashboard Cite

Ferro-coke, as a new burden of blast furnace (BF), can not only greatly reduce the energy consumption and CO2 emission, but also promote the resource utilization by using the low-quality iron ore and low-grade coal. However, the strength of ferro-coke decreased with the increasing amount of iron ore powder. In order to maintain the strength of ferro-coke while increasing the amount of iron ore powder, it is necessary to add binder during the coking process to enhance the strength of ferro-coke. In this paper, phenolic resin, silicon metal powder, corn starch, and coal tar pitch were used as binder for the fabrication of ferro-coke. I-type drum machine (I 600), scanning electron microscope (SEM), and X-ray diffraction (XRD) were applied to test the crushing strength, morphology, and microcrystalline structure of the ferro-coke. The results showed that the increasing amount of iron ore powder resulted in lower crushing strength, higher porosity, and the worse macroscopic morphology of ferro-coke. When the amount of iron ore powder reached 40%, obvious cracks appeared on the surface of ferro-coke. When the amount of iron ore was 30%, the crushing strength of ferro-coke dropped to 18.15%. Among the four binders, coal tar pitch could significantly enhance the cold crushing strength of ferro-coke through decreasing the porosity of ferro-coke and improving the bonding effect between carbon matrix particles. In the case of the 10% coal tar pitch addition, the cold crushing strength of ferro-coke was increased from 18.15% to 76.41%; meanwhile, its hot compression strength during gasification improved by 100N.

show abstract

“…Many studies show that [8][9][10][11][12][13][14][15][16][17] iron-containing substances are harmful to the strength of iron coke while catalyzing its reactivity, especially to the index of coke strength after reaction (CSR). As a result, the role of iron coke in the blast furnace is weakened, which is not conducive to its application in the blast furnace.…”

Section: Introductionmentioning

confidence: 99%