Preparation of high-quality FeV50 alloy by an improved SHS-EAH multi-stage process

Yu, Bin; Yuan, Tiechui; Shi, Junjie; Qiu, Yuchao; Jiang, Chenglong; Xiao-ping, WU; Xiao, Dan; Li, Ruidi; Han, Jianda; Ming-feng, YE

doi:10.1016/j.ceramint.2023.01.094

Cited by 3 publications

(4 citation statements)

References 19 publications

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“…Meanwhile, In the multi-stage smelting process, the dosage of theoretical aluminum addition at each stage can be determined using various modes: uniform, semi-gradient, single-gradient and double-gradient, while keeping the comprehensive aluminum coefficient essentially constant. In the uniform aluminum distribution pattern (U-ADP), akin to the one-step smelting process in reference [36], there is a consistent aluminum addition coefficient across all stages. In contrast, the multi-stage gradient aluminum distribution patterns exhibit varying aluminum addition coefficients at each stage.…”

Section: Framework and Methodsmentioning

confidence: 99%

“…Taking SHS-EAH-4 for example, the T.V content of the three-stage residue slag by air cooling is 0.53 wt.%, 0.76 wt.% and 1.65 wt.%, while the T.V content in the corresponding molten slag is 0.32 wt.%, 0.63 wt.% and 1.24 wt.%, respectively. Through the SEM-EDS and MLA analysis of the residue slag in Figures 10 and 11, the mineral phases in the slag were composed of magnesium aluminum spinel, calcium aluminate, vanadium spinel and ferrovanadium [36]. Vanadium is mainly combined with magnesium and aluminum to form a spinel structure in the existing state of isomorphism, and the reduced vanadium is precipitated at the grain boundary in the form of vanadium-rich spherical particles.…”

Section: Multi-stage Gradient Addition For Aluminothermic Reductionmentioning

confidence: 99%

“…were composed of magnesium aluminum spinel, calcium aluminate, vanadium spinel and ferrovanadium [36]. Vanadium is mainly combined with magnesium and aluminum to form a spinel structure in the existing state of isomorphism, and the reduced vanadium is precipitated at the grain boundary in the form of vanadium-rich spherical particles.…”

Section: Multi-stage Gradient Addition For Aluminothermic Reductionmentioning

confidence: 99%

“…Aluminum (Al) and Silicon (Si) are the most widely used reducing agents for SHS reactions [25][26][27]. Compared with silicothermic reduction, the aluminothermic reduction process has the advantages of being a shorter process, allowing greater heat release and lower environmental risks, and therefore has become the most widely used engineering process for the industrial preparation of ferrovanadium [28].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of a Novel High-Efficiency SHS-EAH Multi-Stage DG-ADP Process for Cleaner Production of High-Quality Ferrovanadium Alloy

Yu,

Yuan,

Shi

et al. 2024

Metals

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A novel high-efficiency industrialized clean production technology based on multi-stage gradient batching and smelting was proposed for the production of high-quality ferrovanadium. The thermodynamic mechanism of aluminothermic reduction equilibrium, alloy settlement and raw material impurity distribution were confirmed, and a multi-stage double-gradient aluminum addition pattern (DG-ADP), the highly efficient separation of molten slag and alloy, and typical impurity control standards of raw materials were achieved on the basis of a self-propagating high-temperature synthesis with an electric auxiliary heating (SHS-EAH) process. The reduction efficiency, separation efficiency and the comprehensive utilization rate of the secondary resources were significantly improved, as the whole total vanadium (T.V) content in the industrially produced residue slag reduced from 2.34 wt.% to 0.60 wt.%, while the corresponding smelting yield increased from 93.7 wt.% to 98.7 wt.% and the aluminum consumption decreased from 510 kg·t−1 to 400 kg·t−1. The multi-stage DG-ADP process enabled the internal circulation of vanadium-bearing materials in the ferrovanadium smelting system, as well as the external circulation of iron and residue slag in the same system, and finally achieved the zero discharge of solid and liquid waste from the ferrovanadium production line, which provides a brand-new perspective for the cleaner production of ferrovanadium alloy.

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Section: Framework and Methodsmentioning

confidence: 99%

Section: Multi-stage Gradient Addition For Aluminothermic Reductionmentioning

confidence: 99%

Section: Multi-stage Gradient Addition For Aluminothermic Reductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of a Novel High-Efficiency SHS-EAH Multi-Stage DG-ADP Process for Cleaner Production of High-Quality Ferrovanadium Alloy

Yu,

Yuan,

Shi

et al. 2024

Metals

Self Cite

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Evaluation of a Novel High-Efficiency Shs-Eah Multi-Stage Dg-Adp Process for Cleaner Production of High-Quality Ferrovanadium Alloy

Yu,

Yuan,

Shi

et al. 2023

Preprint

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Compactability Regularities Observed during Cold Uniaxial Pressing of Layered Powder Green Samples Based on Ti-Al-Nb-Mo-B and Ti-B

Bazhin,

Konstantinov,

Chizhikov

et al. 2023

Metals

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We determined the compactability regularities observed during the cold uniaxial pressing of layered powder green samples, taking into account factors such as composition, height, and number of Ti–B (TiB) and Ti–Al–Nb–Mo–B (TNM) layers. The following composition was chosen for the TNM layer at %: 51.85Ti–43Al–4Nb–1Mo–0.15B, while for the Ti-B layer we selected the composition wt %: Ti-B-(20, 30, 40) Ti. Green samples were made containing both 100 vol % TiB and TNM, and those taken in the following proportions, vol %: 70TiB/30TNM, 50TiB/50TNM, 30TiB/70TNM; multilayer green samples were studied in the following proportions, vol %: 35TiB/30TNM/35TiB, 25TiB/25TNM/25TiB/25TNM, 35TNM/30TiB/35TNM. Based on the obtained rheological data, we determined the rheological characteristics of the layered green samples, including compressibility modulus, compressibility coefficient, relaxation time, and limiting value of linear section deformation. These characteristics were found to vary depending on the composition, height, and number of layers. Our findings revealed that reducing the TNM content in the charge billet composition improves the compaction of powder materials under the given technological parameters of uniaxial cold pressing. Moreover, we observed that increasing the boron content and decreasing the amount of titanium in the Ti–B composition enhances the compactability of powder materials. We also established a relationship between the compaction pressure interval and the density of the layered powder green sample.

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Preparation of high-quality FeV50 alloy by an improved SHS-EAH multi-stage process

Cited by 3 publications

References 19 publications

Evaluation of a Novel High-Efficiency SHS-EAH Multi-Stage DG-ADP Process for Cleaner Production of High-Quality Ferrovanadium Alloy

Evaluation of a Novel High-Efficiency SHS-EAH Multi-Stage DG-ADP Process for Cleaner Production of High-Quality Ferrovanadium Alloy

Evaluation of a Novel High-Efficiency Shs-Eah Multi-Stage Dg-Adp Process for Cleaner Production of High-Quality Ferrovanadium Alloy

Compactability Regularities Observed during Cold Uniaxial Pressing of Layered Powder Green Samples Based on Ti-Al-Nb-Mo-B and Ti-B

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