Experimental investigation and thermodynamic modeling of vanadium, chromium and phosphorus distributions between FeO-SiO2-CaO-V2O3-Cr2O3-P2O5-MnO slag and semi-steel

Li, Xuan; Diao, Jiang; Ke, Zhaoqun; Qiao, Yunfeng; Zhang, Tao; Xie, Bing

doi:10.1051/metal/2016023

Cited by 8 publications

(6 citation statements)

References 15 publications

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“…9 Fe in the real vanadium slag has valence states of +2 and +3, while V and Ti have valence states of +3 and +4, respectively. 25,26 The three results are consistent, indicating that the valence states of the elements in the separated V-spinel are the same as that of the real vanadium slag.…”

Section: Crystal Structure Characterization Of V-spinelmentioning

confidence: 81%

Crystallization behavior and crystal characterization of V-spinel in vanadium slag via in situ separation: displacement mechanism of V and Ti

Feng¹,

Gao²,

Lan³

et al. 2023

CrystEngComm

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Section: Crystal Structure Characterization Of V-spinelmentioning

confidence: 81%

Crystallization behavior and crystal characterization of V-spinel in vanadium slag via in situ separation: displacement mechanism of V and Ti

Feng¹,

Gao²,

Lan³

et al. 2023

CrystEngComm

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“…After the slag-metal interaction, the concentration of [Cr] in the hot metal is 0.013 wt%, implying that 91% of chromium was reduced and entered into the hot metal. According to the literature [26], the chromium in the hot metal would be oxidized into the converter slag and then be removed with the separation of converter slag and molten steel in the steelmaking process, indicating that the chromium in the red mud has no harmful effect on the use of the hot metal in steelmaking process.…”

Section: Resultsmentioning

confidence: 99%

A new method of red mud recycling in the process of hot metal pretreatment

Zhang

Liu

Jiang

2020

Metall. Res. Technol.

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To realize a large-scale consumption of red mud in the steelmaking industry, a new recycling method was investigated through the pre-reduction roasting experiment and the slag-metal interaction experiment simulating the hot metal pretreatment process in the steelmaking industry. In virtue of the sensible heating of the hot metal and the reducibility of [C] and [Si], the iron could be separated and recovered from the pre-reduced red mud pellets into the hot metal directly with a recovery rate exceeding 75%. With the composition adjustment of the residual oxides in the pre-reduced red mud (PRRD) using CaO and Al2O3 or aluminium dross (AD), a slag having a low melting point (below 1300 °C) and a high sulfide capacity (lgCS = −2.3) was formed, and more than 94% of [S] in the hot metal could be removed into this slag through the slag-metal interaction. The desulfurization efficiency of the flux (PRRD-CaO–Al2O3; PRRD-CaO–AD) is approximate to the traditional desulfurizing flux (CaO–CaF2). The advantages of this method are summarized as the low energy cost and the slag valorization.

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“…In addition, most of the reports focused on the dephosphorisation of high-chromium hot metal and thus do not provide effective guidance for the dephosphorisation of hot metal containing moderate concentrations of chromium. On the other hand, Liu et al studied the distribution behaviour of V, Cr and P between FeO-SiO 2 -CaO-V 2 O 3 -Cr 2 O 3 -P 2 O 5 -MnO slag and semi-refined steel containing moderate levels of chromium from 0.1% to 0.9% by a combination of experimental measurements and thermodynamic modeling [14,15] and explored the slag formation path in the converter refining process [16]. Although this work involved the transfer behaviour of Cr and P between hot metal containing moderate chromium concentrations and dephosphorisation slag, the goal was to remove both phosphorus and chromium from hot metal, which is different from the aim in the present research of dephosphorisation coupled with chromium retention.…”

Section: Introductionmentioning

confidence: 99%

Dephosphorisation of hot metal containing moderate amounts of chromium with CaO–FeO_x–Cr₂O₃–CaF₂ slag

Chen

Wan

Xia

et al. 2021

Ironmaking & Steelmaking

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With the extensive use of low-grade Cr-containing ore, the dephosphorisation issue of hot metal containing moderate amounts (0.2%-1%) of chromium is gaining more and more attention. To achieve dephosphorisation and chromium retention, a series of experiments on the dephosphorisation of hot metal containing moderate amounts of chromium were carried out at 1723 K. In the experiments, the crystallisation performance of the slag with various CaO/Fe 2 O 3 ratio and Cr 2 O 3 content, as well as the transfer of phosphorus and chromium between slag and hot metal at 1723 K were investigated. The results show that the dephosphorisation process goes through four stages: melting and precipitation, dissolution of refractory, continual oxidation, and phase transition. With the increase of CaO/Fe 2 O 3 ratio, the chromium loss decreases while the dephosphorisation ratio first increases and then decreases. The addition of Cr 2 O 3 promotes the precipitation of Fe(Cr,Al) 2 O 4 , which inhibits the dephosphorisation and chromium loss.

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Experimental investigation and thermodynamic modeling of vanadium, chromium and phosphorus distributions between FeO-SiO₂-CaO-V₂O₃-Cr₂O₃-P₂O₅-MnO slag and semi-steel

Cited by 8 publications

References 15 publications

Crystallization behavior and crystal characterization of V-spinel in vanadium slag via in situ separation: displacement mechanism of V and Ti

Crystallization behavior and crystal characterization of V-spinel in vanadium slag via in situ separation: displacement mechanism of V and Ti

A new method of red mud recycling in the process of hot metal pretreatment

Dephosphorisation of hot metal containing moderate amounts of chromium with CaO–FeO_x–Cr₂O₃–CaF₂ slag

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Experimental investigation and thermodynamic modeling of vanadium, chromium and phosphorus distributions between FeO-SiO2-CaO-V2O3-Cr2O3-P2O5-MnO slag and semi-steel

Cited by 8 publications

References 15 publications

Crystallization behavior and crystal characterization of V-spinel in vanadium slag via in situ separation: displacement mechanism of V and Ti

Crystallization behavior and crystal characterization of V-spinel in vanadium slag via in situ separation: displacement mechanism of V and Ti

A new method of red mud recycling in the process of hot metal pretreatment

Dephosphorisation of hot metal containing moderate amounts of chromium with CaO–FeOx–Cr2O3–CaF2 slag

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Experimental investigation and thermodynamic modeling of vanadium, chromium and phosphorus distributions between FeO-SiO₂-CaO-V₂O₃-Cr₂O₃-P₂O₅-MnO slag and semi-steel

Dephosphorisation of hot metal containing moderate amounts of chromium with CaO–FeO_x–Cr₂O₃–CaF₂ slag