Vanadium–titanium magnetite ore blend optimization for sinter strength based on iron ore basic sintering characteristics

Zhou, Mi; Jiang, Tao; Yang, Shuren; Xue, Xiangxin

doi:10.1016/j.minpro.2015.04.019

Cited by 57 publications

(21 citation statements)

References 17 publications

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“…Chromium and vanadium resources have been extracted from CCVTM [1][2][3][4][5][6][7]. The viscosity and the TiO 2 content of the slag are high in the blast furnace (BF) iron-making process, due to the high TiO 2 content in the CCVTM.…”

Section: Introductionmentioning

confidence: 99%

Effects of Dolomite on Mineral Compositions and Metallurgical Properties of Chromium-Bearing Vanadium–Titanium Magnetite Sinter

et al. 2017

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Abstract:Chengde chromium-bearing vanadium-titanium magnetite (CCVTM) has been used as an important mineral resource in sinter making. The MgO content of this sinter can be enhanced by adding dolomite, which improved operation of the blast furnace. The effects of MgO in the form of dolomite on metallurgical properties, microstructure and mineral compositions of CCVTM sinter were studied by a sinter pot test, X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and mineral phase microanalysis. The results were as follows: The flame front speed and sinter coefficient decreased with an increase in MgO content from 2.66 to 3.86% by adding dolomite. With an increase in MgO content from 2.66 to 3.86%, the flame front speed, sintering utilization factor, and the value of RI decreased, while RDI and the softening-melting properties improved. In addition, the value of sinter strength (TI) reached a maximum value at MgO = 3.56%. In addition, an increase in the abundance of magnetite, magnesium ferrite, and silicate phase, as well as a decrease in hematite, was found with an increase in MgO content. We concluded that the most appropriate MgO content in the sinter is 3.56%.

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Section: Introductionmentioning

confidence: 99%

Effects of Dolomite on Mineral Compositions and Metallurgical Properties of Chromium-Bearing Vanadium–Titanium Magnetite Sinter

et al. 2017

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“…SJY was a fine ore with 96.31% passing 0.2 mm, 100% passing 1 mm, however YD was coarse ore with only 8.37% passing 0.2 mm, 29.91% passing 1 mm. The experimental method of sintering basic characteristics had been introduced in relevant literature; the paper will not repeat the description [12][13][14].…”

Section: Characterizationmentioning

confidence: 99%

Influence of iron ore concentrate on the characteristics of sintering and reduction of sinter

Guo

Feng

Jiang

et al. 2020

J min metall B Metall

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As Australia is the main iron ore importing country for China, the abundant mineral resources of Australia are the primary raw materials for the sintering process. To better understand the properties of different iron ores from Australia and then guide the sintering process, this study selected four types of Australian ore and one type of domestic ore, and their properties were investigated under different conditions. The experiment of single iron ore sintering was studied to examine the influence of different iron ores on the metallurgical properties of sinter. From this study, the following results were obtained: GG showed poor fluidity and higher assimilability temperature, but the bonding phase strength was the highest; YD showed better fluidity and lower assimilability temperature, whereas SJY (domestic ore) showed better fluidity and higher bonding phase strength, and lower assimilability temperature. The influence mechanism of iron ore on the fluidity was further analyzed by using SEM and ion theory of slag. With the increase SiO2 content of iron ore, the fluidity index increased, the main reason was that the amount of liquid phase increased and the melting point decreased during the sintering. However, an excessive amount of SiO2 caused the decrease of fluidity index of iron ore; the main reason was that the fluidity of the liquid phase itself decreased and secondary hematite appeared. In the case of the higher SiO2 content of iron ore, the main bonding phase was calcium silicate. With the decrease of SiO2 content, the calcium silicate transformed into calcium ferrite. The main reason for this was that the Gibbs free energy of calcium ferrite and dicalcium ferrite (2CaO?SiO2) was higher than that of calcium silicate in the temperature ranges of 400-1600 K. The reduction degree of YD was the highest in all the cases and that of GG was the lowest. Activation energies of 5.39, 3.14, 3.51, 4.47 and 2.92 kJ/mol were obtained for the reduction of GG, PB, BH, SJY, and YD, respectively. In all the cases, the reaction corresponded to the model function of F1(?), and the integral form was -ln(1-?)=kt. Through this investigation, it could be concluded that the most appropriate ore category for sinter pot was YD.

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“…Currently, it is mentioned that blast furnace smelting of HCVTM is the best choice in industrial production [4,5]. Our previous work was a fundamental study to optimize the composites ratio of HCVTM before feeding it into a blast furnace [6][7][8][9][10]. The study focused on the basic HCVTM characteristics, sinter ratio, and metallurgical properties instead of focusing on the carbon thermal reaction in the HCVTM sintering process.…”

Section: Introductionmentioning

confidence: 99%

Influence of Coke Ratio on the Sintering Behavior of High-Chromium Vanadium-Titanium Magnetite

et al. 2017

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High-chromium vanadium and titanium magnetite (HCVTM) sinter has poor properties. The coke ratio has an important effect on the behavior of HCVTM sintering as it affects the mineral phases in the high-chromium vanadium and titanium sinter (HCVTS) via changing the sintering temperature and atmosphere. In this work, the sintering behavior of HCVTM mixed with varying coke ratios was investigated through sintering pot tests, X-ray diffraction (XRD), gas chromatographic analysis, and mineral phase analysis. The results show that, with the increase of the coke ratio from 4.0% to 6.0%, leading to the increase of the combustion ratio of the flue gas, the vertical sintering rate and sinter productivity decrease. Meanwhile, with the change of the coke ratio, the content of magnetite, silicate, and perovskite increase, while the hematite and calcium ferrite decrease. In addition, the tumble strength and reduction ability of HCVTS decrease, and its degradation strength increase. It was found that the appropriate coke ratio for the sintering process was 5.0 wt %.

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Vanadium–titanium magnetite ore blend optimization for sinter strength based on iron ore basic sintering characteristics

Cited by 57 publications

References 17 publications

Effects of Dolomite on Mineral Compositions and Metallurgical Properties of Chromium-Bearing Vanadium–Titanium Magnetite Sinter

Effects of Dolomite on Mineral Compositions and Metallurgical Properties of Chromium-Bearing Vanadium–Titanium Magnetite Sinter

Influence of iron ore concentrate on the characteristics of sintering and reduction of sinter

Influence of Coke Ratio on the Sintering Behavior of High-Chromium Vanadium-Titanium Magnetite

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