Property Investigations of Low‐Grade Vanadium‐Titanium Magnetite Pellets with Different MgO Contents

Gao, Zixian; Cheng, Gongjin; Xue, Xiangxin; He, Yang; Duan, Peining

doi:10.1002/srin.201700543

Cited by 15 publications

(6 citation statements)

References 21 publications

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“…Ilmenites of varying reduction degrees were obtained by combinations of natural and reduced ilmenite. Reduced ilmenite was obtained by reducing the pellets for 0, 30, and 240 min at 1100 • C in a carbon monoxide atmosphere, which was calculated on the basis of reduction formula of iron oxides [25]. The reduction degrees was 0%, 43%, and 75%, respectively.…”

Section: Methodsmentioning

confidence: 99%

Preparation of Ferrotitanium Using Ilmenite with Different Reduction Degrees

Gao

Cheng

et al. 2019

Metals

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The effect of ilmenite with different reduction degrees on the production of ferrotitanium, using a self-propagation high-temperature synthesis method with aluminum as the reducing agent, was investigated. Increasing the degree of reduction not only contributed to lower consumption of aluminum, but also lowered the oxygen content and improved the grades of titanium and iron in the ferrotitanium. The aluminum content of the ferrotitanium increased with an increase in the extent of reduction of ilmenite, so the Al2O3 content formed in the slag decreased with the constant addition of CaO and CaF2 to the Al powder. This decreased relatively the content of high-melting-point CaAl12O19 and increased the contents of low-melting-point CaAl2O4 and CaF2 in the slag, thereby promoting the separation of ferrotitanium and slag. Improving the reduction degree of ilmenite is beneficial to the preparation of ferrotitanium.

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Section: Methodsmentioning

confidence: 99%

Preparation of Ferrotitanium Using Ilmenite with Different Reduction Degrees

Gao

Cheng

et al. 2019

Metals

Self Cite

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“…Gao believed that the reduction swelling index had an inflection point when the MgO addition was 1.25 mass% [82]. The results indicated that the compressive strength of pellets was affected by the content of MgO, but the roasted pellets at 1523 K still met the blast furnace standard.…”

Section: Metallurgical Properties Of Mgo-bearing Pelletsmentioning

confidence: 99%

Review of pellets and blast furnace slag research progress: the effects of MgO on metallurgical properties

Chen,

Jiang,

Wen

et al. 2023

Ironmaking & Steelmaking

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It is imperative to reduce the pollution and energy consumption in the blast furnace ironmaking process. High pellets operation is a developing direction in the future. The function of blast furnace slag system cannot be ignored. In order to balance the MgO content in blast furnace slag and improve the metallurgical properties of pellets in the high pellets ratio operation, the research on MgO-bearing pellets is necessary. In this paper, the metallurgical properties of MgO-bearing pellets and the properties of blast furnace slag effect by MgO in different raw material conditions, especially for Vanadium Titanomagnetite, were analysed and summarized. This review provided a reference for the development of MgO-bearing pellets and the performance of blast furnace slag effect by MgO. It is hoped to reduce pollution and promote the technical progress of blast furnace ironmaking.

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“…The pressure loss in cohesive zone accounted for about 60% of the total pressure loss in BF. [6][7][8] Therefore, the study on the softening and melting behavior of Ti-bearing burden is of great significance to increase the VTM proportion in BF burden. In order to improve the softening and melting performance of Ti-bearing burden, many studies have been conducted that can be divided into three aspects: reasonable burden structure, appropriate chemical composition and suitable charging system.…”

Section: Introductionmentioning

confidence: 99%

Softening–melting Properties and Slag Evolution Behavior of High Titanium Sinter

et al. 2020

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Vanadium-titanium magnetite (VTM) is an important strategic resource, and now the process of Blast Furnace (BF) is the dominate route for smelting VTM. However, the difficulties of smelting VTM by BF inhibited further increase of VTM proportion in furnace burden due to its complex behavior in cohesive zone. The objective of this study is to reveal the softening-melting behavior of a high titanium sinter. The results indicated that the softening-melting properties of the experimental high titanium sinter were relatively worse than that of ordinary sinter due to its wider melting temperature interval and bad gas permeability in melting stage. The melting temperature interval of 225°C was obtained, and the permeability index (S value) of 1 917 kPa•°C was calculated correspondingly. A second increase in pressure drop was observed in the softening-melting process, which may be ascribed to great difference of melting point between pig iron and slag. The mechanism on slag evolution was also clarified by interrupting the softening-melting process at characteristic temperatures. The XRD patterns indicated that initial slag phase mainly consisted of wustite, silicates and perovskite, of which the wustite content decreased gradually during the softening-melting process. The content of wustite was a crucial factor that affected the phase transformation during slag evolution.

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Property Investigations of Low‐Grade Vanadium‐Titanium Magnetite Pellets with Different MgO Contents

Cited by 15 publications

References 21 publications

Preparation of Ferrotitanium Using Ilmenite with Different Reduction Degrees

Preparation of Ferrotitanium Using Ilmenite with Different Reduction Degrees

Review of pellets and blast furnace slag research progress: the effects of MgO on metallurgical properties

Softening–melting Properties and Slag Evolution Behavior of High Titanium Sinter

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