Effect of Preformed Calcium Ferrite Addition on Sintering Behavior of Vanadium Titanium Magnetite Ore

Li, Gang; Lv, Xuewei; Zheng, Zhuang Hao; Ling, Jiawei; Qiu, Guibao

doi:10.1007/s11837-020-04476-y

Cited by 12 publications

(6 citation statements)

References 35 publications

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“…It found that in the CAP, smaller pellets mixed better uniformity.At the same time, the addition of 10-12mm pellets for composite agglomeration is more likely to lead to segregation of the melt and fuel during the granulation process, resulting in uneven distribution of the sintered ore liquid phase, which increases the CaTiO3 phase at the boundary between the pellet part and the matrix part and reduces the overall strength of the pellet. [19,[24][25][26][27]. Therefore, 5-8 mm VTM-B pellets selected for sintering mixed with the matrix in the CAP.…”

Section: Effect Of Pelletized Feed Size On Mineralization Characteris...mentioning

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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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: Effect Of Pelletized Feed Size On Mineralization Characteris...mentioning

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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“…The investigators have conducted research on the effect of return fines embedding on the sinter packed bed permeability, productivity, FFS, and cold strength. Similarly, numerous studies have been conducted to improve the properties and productivity of VTM sinter [29][30][31][32][33][34][35][36][37]. However, to the authors' best knowledge, a very limited number of studies have been studied the effect of return fines embedding on the sintering behavior of VTM ore.…”

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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“…VTM is mainly smelted in a blast furnace, and the products are hightitanium slag and vanadium-containing molten iron [4][5][6]. In the BF, limestone needs to be added as a solvent, which not only reduces the grade of TiO 2 in the blast furnace slag but also forms perovskite with TiO 2 [7]. The generation of perovskite will certainly increase the difficulty of titanium recovery [8].…”

Section: Introductionmentioning

confidence: 99%

Preparation, Sintering Behavior and Consolidation Mechanism of Vanadium-Titanium Magnetite Pellets

et al. 2021

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High-quality oxidized pellets are the basis to achieve high-efficiency utilization of vanadium–titanium magnetite (VTM) ores. Bentonite was used as a binder of VTM. The main phase composition of VTM is titanomagnetite and ilmenite. When the amount of bentonite is 1%, the compressive strength and dropping strength of VTM pellets can meet the requirements. To improve metallurgical properties, the pellets need to be roasted. The best conditions for roasting are as follows: calcination temperature of 1523 K and a calcination time of 20 min. The consolidation mechanism, phase transformation, and crystal structure transformation of VTM in the process of oxidation roasting are also explained.

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Effect of Preformed Calcium Ferrite Addition on Sintering Behavior of Vanadium Titanium Magnetite Ore

Cited by 12 publications

References 35 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

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

Preparation, Sintering Behavior and Consolidation Mechanism of Vanadium-Titanium Magnetite Pellets

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