Treatment of vanadium–titanium magnetite based on composite agglomeration process (CAP)

Lu, Yizhong; Wu, Shengli; Niu, Lele; Liu, Zhengjian; Zhou, Heng; Hong, Zhibin; Song, Sang‐Hyun

doi:10.1080/03019233.2020.1812037

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…The utilization factor (productivity), which is affected by the vertical sintering speed and the yield, displays a trend of markedly decreasing when using pellet with size of 10–12 mm, and solid fuel consumption is significantly higher too with the use of it. For the ordinary concentrate without V and Ti elements added at 15%, the economic and technical indexes of traditional sintering are significantly better than that of using VTM, while for CAP, it only plays a role in reducing solid fuel consumption [8]. The results of the sintering process correspond to the subsequent mineral phases structure.…”

Section: Resultsmentioning

confidence: 99%

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Influence of pelletizing process parameters on the performance of V–Ti magnetite green pellets for composite agglomeration

Liu

Zhang

et al. 2021

Ironmaking & Steelmaking

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To use vanadium-titanium magnetite (VTM) resources for sintering, a composite agglomeration process (CAP) is applied. This paper studies the effects of pelletizing parameters, including particle size, moisture content and bentonite content on VTM green pellets, composite agglomeration process and mineralogy. The experimental results show that the optimal pellets particle size, water and bentonite content are 5-8 mm, 8.75% and 2.0%, respectively, for the strength of VTM pellets. In the sintering process, the economic and technical indexes obtained by using VTM pellets based on CAP are significantly better than those obtained by traditional sintering process. When using CAP, VTM pellets with the particle size of 5-8 mm have more advantages in the air permeability of the feed layer compared with those with the particle size of 10-12 mm, and accordingly have higher sintering speed, yield, productivity and lower fuel consumption. The addition of 15% ordinary magnetite concentrates into VTM pellets did not improve the productivity, but it was helpful to reduce the solid fuel consumption. By analysing the mineral phase structure of sintering products under different schemes, it is found that the pellets are closely bound to the matrix in the CAP. The main phase in the pellet part is hematite phase, and a large amount of SFCA phase can be observed in the matrix part. When ordinary magnetite concentrate is added, the crystal connections within the particles become more complete.

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Section: Resultsmentioning

confidence: 99%

“…However, the sintering process usually uses a large amount of alkaline flux. CaO brought by fluxes reacts with TiO 2 in VTM to form perovskite, destroying the strength of the sinter [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Influence of pelletizing process parameters on the performance of V–Ti magnetite green pellets for composite agglomeration

Liu

Zhang

et al. 2021

Ironmaking & Steelmaking

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“…10, all Ti elements are coalesced inside the pellet and surrounded by the liquid phase of the sinter matrix, avoiding damage to the strength of sinter product. Table 3 shows the suitable process parameters obtained from the study exploring the utilization of vanadium-titanium magnetite by CAP 126,127) .…”

Section: Table3mentioning

confidence: 99%

Iron Ore Granulation for Sinter Production: Developments, Progress, and Challenges

et al. 2023

Self Cite

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Iron ore granulation is an indispensable process in the production of sinter that can influence and regulate the yield, efficiency and quality. Although a great deal of research has been done on the granulation process over the past decades, we still need to think about the current and future development of this process, as sinter is still an essential raw material for ironmaking blast furnace today. This paper begins with a review of particle agglomeration theory development for sintering granulation, followed by a summary of existing granulation evaluation methods and indexes. The roles of iron ore, fuel, fluxes, and moisture in sintering granulation are also analyzed, and finally advanced granulation equipment and processes for industrial production, as well as their applications, are summarized. Correspondingly, the challenges in sintering granulation field are proposed to include: (1) Development of iron ore sintering industry; (2) Ore blending optimization based on synergistic coupling of granulation and sintering; (3) Optimization of granulation process and equipment; (4) Methods and tools for granulation scientific research. These issues will be tackled and overcome in the future by both steel enterprises and academic researchers, generating suggestions for future development in the field of sintering granulation.

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“…The permeability of the sinter packed bed would significantly influence the flame front travelling speed and the heat transformation during the sintering process, which in turn determines the sinter productivity, yield and quality [3]. For the VTM sintering process, the small specific surface area and poor hydrophilicity of VTM lead to undesirable granulation performances [4], which adversely affects the bed permeability. Moreover, VTM sinter has poorer metallurgical properties and strength compared with conventional sinter due to the rich content of TiO 2 in mineral components.…”

Section: Introductionmentioning

confidence: 99%

Effect of Return Fines Embedding on the Sintering Behaviour of Vanadium Titanium Magnetite Concentrates

Peng

Liu

Hua

et al. 2022

Metals

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To improve the permeability of sinter packed bed for achieving the efficient utilization of low-grade iron bearing minerals, the effect of the returned fines embedding on productivity, yield, flame front speed (FFS) in the vanadium titanium magnetite (VTM) sintering process, tumble index (TI) of sinter, and permeability of the sinter packed bed was clarified. Results indicate that the productivity, yield, flame front speed, and tumble index of the vanadium titanium magnetite sintering process are all increased to a certain extent after embedding different sizes of returned fines, and the optimal sintering indices occur when the particle size of return fines for embedding is 3~5 mm. The optimal mass ratio of return fines for embedding was confirmed at 80%, and a continued increase in the mass ratio results in a decrease in flame front speed, yield, productivity, and tumble strength. Among the five different possible locations of embedded return fine layer, the middle-lower layer corresponds to the highest flame front speed. As the mass ratio of return fines for embedding is enhanced from 0% to 50%, the permeability of the sinter packed bed is improved at each stage of sintering.

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Treatment of vanadium–titanium magnetite based on composite agglomeration process (CAP)

Cited by 9 publications

References 20 publications

Influence of pelletizing process parameters on the performance of V–Ti magnetite green pellets for composite agglomeration

Influence of pelletizing process parameters on the performance of V–Ti magnetite green pellets for composite agglomeration

Iron Ore Granulation for Sinter Production: Developments, Progress, and Challenges

Effect of Return Fines Embedding on the Sintering Behaviour of Vanadium Titanium Magnetite Concentrates

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