Effect of MgO addition on the metallurgical properties of the vanadium-titanium pellet with simulating blast furnace conditions

Zhao, Wei; Chu, Mansheng; Feng, Cong; Wang, Hongtao; Liu, Zhenggen; Tang, Jue; Wang, Wanping

doi:10.1080/03019233.2018.1527538

Cited by 16 publications

(9 citation statements)

References 23 publications

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“…It could be deduced that the lattice volume swelling during the transition of magnesio-ferrite to magnesio-wustite was smaller than that of Fe 2 O 3 to FeO. 13) The increase in basicity in high MgO fluxed pellets promoted the fluidity of Mg 2 + , which might be one of the reasons for reducing reduction swelling. Meanwhile, based on the above experimental results, pellets with basicity of 0.6 to 1.3 were reduced under 1 173 K and 70% (volume percent) CO atmosphere.…”

Section: Effect Of Basicity On Rdi and Rsimentioning

confidence: 95%

Effect of Basicity on Metallurgical Properties of Fluxed Pellets with High MgO Content

et al. 2021

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The basicity (CaO/SiO 2 ) has an important influence on the metallurgical properties of fluxed pellet with high MgO content. This paper studied the effect and function of basicity on metallurgical properties of fluxed pellet, such as compressive strength, reduction disintegration, reduction swelling and the softening-melting behaviour systematically with simulating BF conditions. From the results, with increasing basicity from 0.6 to 1.3, the compressive strength increases from 2 842 N to 3 532 N, the pore structure become more compact, and the following phase transformation is observed from Fe 2 SiO 4 → Ca 2 SiO 4 , Mg X Fe 2−X SiO 4 → MgFe 2 O 4. Additionally, the reduction properties of high magnesium fluxed pellets are improved, the low temperature disintegration index increases from 89.8% to 97.78%, and the reduction swelling index decreases from 19.02% to 8.45%. With the increase of basicity in the pellets, the softening interval and melting interval of the pellets decrease slightly, and the position of the cohesive zone shift down and gradually become thinner, which improve the permeability of the cohesive zone. In the basicity range of 0.6-1.3, the optimum metallurgical properties of pellets are observed for the basicity of 1.1.

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Section: Effect Of Basicity On Rdi and Rsimentioning

confidence: 95%

Effect of Basicity on Metallurgical Properties of Fluxed Pellets with High MgO Content

et al. 2021

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“…What both sinter and pellet have in common is that with the increase in MgO content, the temperature required to produce the same amount of liquid phase increases. It is well known that the premature formation of the liquid phase in the cohesive zone will result in a decrease in the permeability of the burden column and an increase in the differential pressure [22]. Therefore, the improving tendency of the gas permeability of V-Ti burden and pellet could be ascribed to the formation of material with a high melting point.…”

Section: Softening-melting Behaviormentioning

confidence: 99%

“…Large amounts preceding works demonstrated that adding MgO in pellet or sinter could enhance its high temperature properties. Zhao [22] observed that the softening-melting behavior and permeability of V-Ti pellets packed bed were improved with increasing MgO content. Umadevi T [23] studied the effect of MgO on reducibility and softening-melting behaviors of sinters.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Softening-Melting Behaviors and Slag Characteristics of Vanadium-Titanium Magnetite Burden with Various MgO Addition

et al. 2022

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MgO addition plays an essential role in the blast furnace smelting process, including softening-melting characteristics and metallurgical properties of slag. In the present study, the effect of MgO distribution on the softening-melting characteristics and slag system of vanadium-titanium magnetite burden were explored by simulating BF conditions. The results show that the MgO flux addition significantly affects the crystallization temperature of slag-phase, the precipitated phase components, and slag viscosity. This indicates that appropriate MgO addition can improve the metallurgical properties of blast furnace slag effectively, thereby improving the softening-melting-dripping performance of the mixed burden. The V-Ti pellets with a MgO content higher than 2.40 wt% exhibit optimum metallurgical properties. With a constant MgO content in mixed burden, the softening-melting properties of composite burden could be improved effectively as the MgO partitioning scheme includes 1.90 wt% MgO in sinter and 3.02 wt% MgO in pellet.

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“…The current research was mainly focused on the oxidation induration mechanism of aluminium-containing, silicon-containing, and titanium-containing pellets [13][14][15][16][17][18][19][20]. Wang et al [5] studied the roasting characteristics of fluorinebearing magnetite.…”

Section: Introductionmentioning

confidence: 99%

Investigate the oxidation induration mechanism of manganese-bearing magnetite concentrate pellets

Xiao

et al. 2022

Ironmaking & Steelmaking

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In this study, to promote the application of manganese-containing magnetite, the oxidation induration mechanism for manganese-bearing magnetite concentrate pellets (MBMCP) was investigated. X-ray diffraction, scanning electron microscopy-energy dispersive spectroscopy, and thermogravimetric analyses were carried out to systematically study the phase composition, microstructure, elemental distribution, and oxidation behaviour of the MBMCP. The results indicated that Mn 3 O 4 exerted had a negative effect on the oxidation induration of the pellet. With an increase in the amount of added Mn 3 O 4 , the compressive strength and oxidation degree significantly decreased and the porosity increased. The content of the formed Mn-Fe solid solution (MnFe 2 O 4 ) increased with the increase of Mn 3 O 4 , which made the matrix of the MBMCP change from dense to porous, suggesting that the growth of haematite grains was inhibited and the bridging between haematite grains was broken. These results provide the theoretical and technical foundations for the industrial production of MBMCP.

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Effect of MgO addition on the metallurgical properties of the vanadium-titanium pellet with simulating blast furnace conditions

Cited by 16 publications

References 23 publications

Effect of Basicity on Metallurgical Properties of Fluxed Pellets with High MgO Content

Effect of Basicity on Metallurgical Properties of Fluxed Pellets with High MgO Content

Revealing the Softening-Melting Behaviors and Slag Characteristics of Vanadium-Titanium Magnetite Burden with Various MgO Addition

Investigate the oxidation induration mechanism of manganese-bearing magnetite concentrate pellets

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