Hydrogen on softening-melting and slag forming behavior under the operation of blast furnace with iron coke charging

Xiao, Yuyang; Zhu, Kenny Q.; Ye, Shuixin; Xie, Zhengya; Zhang, Kun; Lu, Xionggang

doi:10.1016/j.ijhydene.2022.07.035

Cited by 13 publications

(2 citation statements)

References 31 publications

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“…Samples P1~P3 shown in Fig 1 represent the mass ratios of pellet and sinter in the experimental setup are 40%, 30%, and 20%, respectively. S-value is used to measure the permeability of burden [22][23][24]. Four kinds of characteristic temperatures are measured in S&M experiment to represent the range of cohesive zone.…”

Section: Softening and Melting Experiments Results And Discussionmentioning

confidence: 99%

Relationship between Slag Phase and Softening & Melting Properties of Cohesive Zone

Fan,

Zhang

2023

ISIJ Int.

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In this paper, Softening & Melting experiments with different charge ratios are carried out and compared with typical slag phase properties. The relationship between the charge ratio and the softening & melting properties is non-linear correlation. The liquid phase generation process of the slag corresponds to the softening zone and the viscosity change process of the slag phase after the liquid phase is fully generated corresponds to the melting zone. In the softening interval the properties of FeO-CaO-SiO 2 system play a dominant role, while in the melting interval the properties of FeO-CaO-Al 2 O 3 -SiO 2 system play a dominant role. This provides ideas for the study of the limiting links in the soft fusion zone of complex systems.

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Section: Softening and Melting Experiments Results And Discussionmentioning

confidence: 99%

Relationship between Slag Phase and Softening & Melting Properties of Cohesive Zone

Fan,

Zhang

2023

ISIJ Int.

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“…[18][19][20][21] Furthermore, the higher the gas permeability, the more conducive it is to the smooth flow of the burden and the improvement of the blast furnace operation. [22][23][24][25][26] Our previous studies analyzed the oxidation consolidation mechanism and phase transformation behavior of HVTM flux pellets. 27) To further improve the utilization of HVTM flux pellets, their softening and melting properties should be investigated.…”

Section: Introductionmentioning

confidence: 99%

Softening-melting Properties of High-chromium Vanadium–titanium Magnetite Pellets with Different Basicity

Chen,

Wen,

Jiang

et al. 2023

ISIJ Int.

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High-chromium vanadium-titanium magnetite (HVTM) is a critical polymetallic ore resource, and its large-scale utilization is considered feasible by smelting flux pellets in blast furnaces. This study investigated the softening-melting properties of pure HVTM pellets (100% HVTM pellets) and HVTM with 30% conventional iron pellets (70% HVTM pellets) with different basicity (R). The results indicated that the softening-melting properties of 100% HVTM pellets deteriorated when R increased from 0.2 to 1.8, and the properties of 70% HVTM pellets first deteriorated and then improved. Moreover, 100% HVTM pellets exhibited superior softening-melting properties for R<1.0, while 70% HVTM flux pellets were better at R>1.6. The gas permeability of 100% and 70% HVTM pellets decreased with increasing basicity, although the permeability of 70% HVTM pellets was higher. Notably, the key components of acid slag are Mg-bearing anosorite and pyroxene, whereas those of basic slag are perovskite and melilite. With the increase of basicity, the content of chromium in dropping iron decreased and that of vanadium increased.

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Performance Optimization and Efficient Application of Highly Reactive Iron Coke: Research Progress and Future Trend

Wang

Bao

et al. 2023

steel research int.

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Iron coke has emerged as a promising raw material for low‐carbon ironmaking. However, the structure and properties of iron coke are still obstacles to practical application in blast furnaces, especially the strength of iron coke. Herein, investigations on the preparation and properties of iron coke are reviewed and an integrated system for the performance optimization and efficient utilization of iron coke is proposed. First, the characteristics of different preparation processes for iron coke are compared; then the advantages and limitations of the three processes are summarized. Afterward, the evolution mechanism of iron coke strength and the catalytic mechanism of Fe on the gasification reaction of iron coke are explored in depth. In addition, the coupling mechanism of iron coke gasification and iron ore reduction is analyzed and discussed. The influence of iron coke on the melting–dropping properties of blast furnace charge and the mathematical simulation of using iron coke in the blast furnace are analyzed and summarized. Finally, a comprehensive strategy for the performance optimization of iron coke and its efficient application in the blast furnace is proposed, in which the sequence slicing 3D reconstruction method is applied to analyze the relationship between microstructure and performance of iron coke.

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Hydrogen on softening-melting and slag forming behavior under the operation of blast furnace with iron coke charging

Cited by 13 publications

References 31 publications

Relationship between Slag Phase and Softening & Melting Properties of Cohesive Zone

Relationship between Slag Phase and Softening & Melting Properties of Cohesive Zone

Softening-melting Properties of High-chromium Vanadium–titanium Magnetite Pellets with Different Basicity

Performance Optimization and Efficient Application of Highly Reactive Iron Coke: Research Progress and Future Trend

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