Melting Behavior of Titanium-Bearing Electric Furnace Slag for Effective Smelting of Vanadium Titanomagnetite

Wang, Shuai; Guo, Yanxia; Jiang, Tao; Chen, Feng; Zheng, Fuqiang; Yang, Lingzhi

doi:10.1007/s11837-018-2983-0

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…Here, X represents the leaching rate; t is the leaching time (min); k 1 , k 2 , k 3 , and k 4 are the reaction rate constants; and F p is the shape coefficient of the TEFS particles. F p equals 3 if the TEFS particles are spherical; thus, in this case, Equations (8) and (9) are exactly the same. The experimental data were substituted into the above equations.…”

Section: Kinetic Analysismentioning

confidence: 97%

“…Although it is relatively easy to leach Ti from titanium-bearing electric furnace slag (TEFS) derived from ilmenite using sulfuric acid, it is difficult to extract Ti from TEFS produced from vanadium titanomagnetite [2,7,8]. The Ti content of TEFS produced from vanadium titanomagnetite is lower than that of TEFS produced from ilmenite [9][10][11]. Moreover, the content of impurities is higher, which aggravates the leaching rate of Ti during the leaching process and influences the subsequent concentration and hydrolysis of the titanium solution.…”

Section: Introductionmentioning

confidence: 99%

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Leaching Behaviors of Impurities in Titanium-Bearing Electric Furnace Slag in Sulfuric Acid

et al. 2020

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Titanium-bearing electric furnace slag (TEFS) was prepared from vanadium titanomagnetite and leached with sulfuric acid. The Ti leaching rate of vanadium titanomagnetite TEFS is significantly lower than that of ilmenite TEFS. The impurity content in vanadium titanomagnetite TEFS is higher than that in ilmenite TEFS. This might be one of the main factors resulting in the low leaching rate of Ti, so the leaching behaviors of various impurities under different conditions (temperature, acid/solid weight ratio, particle size, and initial sulfuric acid concentration) were investigated. The following trends were observed under different leaching conditions: The leaching rate of Fe increased rapidly and reached equilibrium quickly, that of Si increased quickly in the early stage and then decreased in the later stage, that of Ca increased initially and reached equilibrium later, and the leaching rates of Mg and Al increased gradually until the equilibrium was reached. The leaching rate of Fe was too rapid to be able to investigate its leaching kinetics, and the insoluble leached products of Si and Ca interfered with their leaching. The effects of leaching parameters on the leaching of impurities were further analyzed by X-ray diffraction (XRD) and scanning electron microscopy analysis. XRD data indicated that spinel is the major Mg- and Al-bearing mineral in TEFS. Mg and Al showed similar leaching behaviors, and their leaching conformed to a new model based on interface transfer and diffusion across the product layer, both of which affect the leaching rate.

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Section: Kinetic Analysismentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Leaching Behaviors of Impurities in Titanium-Bearing Electric Furnace Slag in Sulfuric Acid

et al. 2020

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“…Vanadium-titanium magnetite is a complex polymetallic iron ore resource with comprehensive utilization potential. [1][2][3] and has attracted attention for multi-stage utilization. The process involving blast furnace ironmaking, blast furnace slag titanium extraction, converter steelmaking, converter slag vanadium extraction has been rationalized and adopted in Panzhihua Iron and Steel Company, China.…”

Section: Introductionmentioning

confidence: 99%

Softening-melting Properties of High-chromium Vanadium–titanium Magnetite Pellets with Different Basicity

Chen,

Wen,

Jiang

et al. 2023

ISIJ Int.

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High-chromium vanadium-titanium magnetite (HVTM) is a critical polymetallic ore resource, and its large-scale utilization is considered feasible by smelting flux pellets in blast furnaces. This study investigated the softening-melting properties of pure HVTM pellets (100% HVTM pellets) and HVTM with 30% conventional iron pellets (70% HVTM pellets) with different basicity (R). The results indicated that the softening-melting properties of 100% HVTM pellets deteriorated when R increased from 0.2 to 1.8, and the properties of 70% HVTM pellets first deteriorated and then improved. Moreover, 100% HVTM pellets exhibited superior softening-melting properties for R<1.0, while 70% HVTM flux pellets were better at R>1.6. The gas permeability of 100% and 70% HVTM pellets decreased with increasing basicity, although the permeability of 70% HVTM pellets was higher. Notably, the key components of acid slag are Mg-bearing anosorite and pyroxene, whereas those of basic slag are perovskite and melilite. With the increase of basicity, the content of chromium in dropping iron decreased and that of vanadium increased.

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“…Titanomagnetite is a polymetallic co-associated mineral with iron and titanium as the main metal elements, followed by other elements (vanadium, cobalt, nickel, chromium, copper, scandium, selenium, and gallium) [1][2][3][4][5] . Titanomagnetite is widely distributed in the world, mainly in Russia, South Africa, New Zealand, China, the United States, Canada, Norway, Finland, India, and Sweden [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Microstructure Ti–Fe Phase Separation Mechanism in the Direct Reduction Process of Titanomagnetite with Coal by Microwave Heating

et al. 2022

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Synopsis: Although microwave heating has been used in the field of metallurgy since the 1980s, there are few reports on using microwave heating to strengthen Ti-Fe phase separation in the reduction process of titanomagnetite. Microstructure Ti-Fe phase separation by microwave heating was found to be beneficial to the reduction process of titanomagnetite through the investigation of formation enthalpy and reduction difficulties. The dielectric properties and energy band structure of Fe 3 O 4 , Fe 2 O 3 , and TiO 2 were determined, the dielectric constant (𝜀 ′ 𝑟 : 20.00) and dielectric loss (𝜀 ′ 𝑟 ′ : 2.82) of Fe 3 O 4 were significantly superior to those of TiO 2 (𝜀 ′ 𝑟 : 3.42, 𝜀 ′ 𝑟 ′ : 0.04), and the physical thermal stress between Fe 3 O 4 and TiO 2 phases in the reduction process was conducive to the microstructure Ti-Fe phase separation process. Besides thermal stress, microstructure Ti-Fe phase separation was mainly due to the ampere traction force generated between local isotropic ring current in adjacent iron atoms. This study revealed the microstructure Ti-Fe phase separation mechanism in the reduction process of titanomagnetite by microwave heating.

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Melting Behavior of Titanium-Bearing Electric Furnace Slag for Effective Smelting of Vanadium Titanomagnetite

Cited by 12 publications

References 19 publications

Leaching Behaviors of Impurities in Titanium-Bearing Electric Furnace Slag in Sulfuric Acid

Leaching Behaviors of Impurities in Titanium-Bearing Electric Furnace Slag in Sulfuric Acid

Softening-melting Properties of High-chromium Vanadium–titanium Magnetite Pellets with Different Basicity

Microstructure Ti–Fe Phase Separation Mechanism in the Direct Reduction Process of Titanomagnetite with Coal by Microwave Heating

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