Phase equilibrium studies of titanomagnetite and ilmenite smelting slags

Liao, Jinfa; Zhao, Baojun

doi:10.1007/s12613-021-2376-1

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…Here, ( ) and [ ] represent the X values of the slag and alloy phases, respectively. The oxidation state of Ti in the slag was assumed to be 4 based on previous studies [21][22][23][24].…”

Section: Resultsmentioning

confidence: 99%

Distribution of Platinum between the SiO2–CaO–Al2O3–TiO2 Slag System and Molten Copper

Takahashi,

Murata,

Yamaguchi

2024

Mater. Trans.

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A residue containing TiO 2 and PGMs is generated in the hydrometallurgical process used for recycling platinum-group metals (PGMs). In this study, a pyrometallurgical process was considered in which PGMs from the residue generated in the hydrometallurgical process were concentrated in a molten copper phase as a collector metal and TiO 2 was separated into the SiO 2 -CaO-TiO 2 slag phase with SiO 2 and CaO flux. The dissolution of PGMs must be reduced to minimize the loss of PGMs to the slag. Therefore, the distribution ratios of Pt as representative PGMs between the liquid SiO 2 -CaO-Al 2 O 3 -TiO 2 or liquid SiO 2 -CaO-TiO 2 slag and molten copper were measured at 1773 K under an oxygen partial pressure of p O2 ¼ 10 À10 . The experimental results showed that the distribution ratio of Pt increased with TiO 2 concentration in the slag, and the distribution ratio of Pt reached a maximum value at a TiO 2 concentration of approximately 10 mass%, and decreased with a further increase in TiO 2 concentration with the SiO 2 -CaO-Al 2 O 3 -TiO 2 slag. However, as TiO 2 concentration in the slag increased, the distribution ratio of Pt decreased with the SiO 2 -CaO-TiO 2 slag. Additionally, the experimental results showed that the distribution ratio of Pt between the SiO 2 -CaO-Al 2 O 3 -TiO 2 slag and liquid copper increased with the slag basicity B, defined as B = (mass%CaO)/(mass%SiO 2 ) when the TiO 2 concentration in the slag was greater than 10 mass%.

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“…Here, ( ) and [ ] represent the X values of the slag and alloy phases, respectively. The oxidation state of Ti in the slag was assumed to be 4 based on previous studies [21][22][23][24].…”

Section: Resultsmentioning

confidence: 99%

Distribution of Platinum between the SiO2–CaO–Al2O3–TiO2 Slag System and Molten Copper

Takahashi,

Murata,

Yamaguchi

2024

Mater. Trans.

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“…The content of each component in the wet slag is first analyzed chemically, and the point is plotted in the dry salt map. 17 If the composition of a solid phase is close to a certain solid phase, IR spectroscopy or X-ray diffraction analysis can be used to determine the composition of the substance, and then accurately determine the composition of the solid phase.…”

Section: Characterizationmentioning

confidence: 99%

Determination and analysis of solid–liquid equilibria for ternary systems Na₂SO₄–H₂O₂–H₂O and Na₂CO₃–H₂O₂–H₂O at 5 °C

Liu

2024

Journal of Chemical Research

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To develop a better process for synthesizing sodium percarbonate and getting separation of the sodium salt, the equilibrium of the ternary system Na2SO4–H2O2–H2O and Na2CO3–H2O2–H2O at 5 °C was determined using the isothermal method, and the appropriate synthesis conditions for sodium carbonate from a theoretical perspective was discussed. The Na2SO4–H2O2–H2O system phase diagram contains one co-saturated point of Na2SO4·0.5H2O2·H2O and Na2SO4·10H2O. The Na2CO3–H2O2–H2O system phase diagram contains three crystal zones: Na2CO3·10H2O crystallization field, 0Na2CO3·1.5H2O2·H2O crystallization field and Na2CO3·2H2O2·H2O crystallization field. According to the phase diagram, the suitable raw material ratio of sodium percarbonate synthesis was obtained, to get the maximum of product yield, the optimal mass ratio of Na2CO3 to 30% H2O2 is 0.609.

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“…The HIsmelt process is a new molten reduction ironmaking technology, which mainly consists of a rotary kiln process for charge heating and pre-reduction and a SRV (smelting reduction vessel) process for ore smelting. [1][2][3][4][5] The process was originally developed in cooperation with Rio Tinto, Australia, and Nucor Steel, USA, and was formally introduced to China in 2012 in Shouguang, Shandong Province, with stable production in 2018. 6) HIsmelt melting reduction ironmaking process uses iron ore fines and coal fines as raw materials.…”

Section: Introductionmentioning

confidence: 99%

Kinetics Analysis of Iron Oxide Reduction by Solid Carbon in HIsmelt Ironmaking Slag

Wang,

Si,

Pang

et al. 2024

ISIJ Int.

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The HIsmelt process is a new molten reduction ironmaking technology with lower energy consumption and carbon emissions than the traditional blast furnace ironmaking route. In the HIsmelt smelting process, the reaction process between solid carbon and iron-bearing slag has its own characteristics. To investigate the kinetic mechanism of iron oxide reduction in slag, the degree of conversion was characterized by measuring the change of CO content of the generated gas during the experiments and analyzed by combining the model fitting method. The experimental results showed the highest agreement with the Avrami-Erofeev equation. The rate-controlling mechanism for the reduction of iron oxides in the slag was judged to be the random nucleation and subsequent growth of the products. In the study, the rate-controlling mechanism and the kinetic parameters of the reduction reaction of iron oxide in slag have been obtained.

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Phase equilibrium studies of titanomagnetite and ilmenite smelting slags

Cited by 11 publications

References 32 publications

Distribution of Platinum between the SiO<sub>2</sub>–CaO–Al<sub>2</sub>O<sub>3</sub>–TiO<sub>2</sub> Slag System and Molten Copper

Distribution of Platinum between the SiO<sub>2</sub>–CaO–Al<sub>2</sub>O<sub>3</sub>–TiO<sub>2</sub> Slag System and Molten Copper

Determination and analysis of solid–liquid equilibria for ternary systems Na₂SO₄–H₂O₂–H₂O and Na₂CO₃–H₂O₂–H₂O at 5 °C

Kinetics Analysis of Iron Oxide Reduction by Solid Carbon in HIsmelt Ironmaking Slag

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Phase equilibrium studies of titanomagnetite and ilmenite smelting slags

Cited by 11 publications

References 32 publications

Distribution of Platinum between the SiO<sub>2</sub>–CaO–Al<sub>2</sub>O<sub>3</sub>–TiO<sub>2</sub> Slag System and Molten Copper

Distribution of Platinum between the SiO<sub>2</sub>–CaO–Al<sub>2</sub>O<sub>3</sub>–TiO<sub>2</sub> Slag System and Molten Copper

Determination and analysis of solid–liquid equilibria for ternary systems Na2SO4–H2O2–H2O and Na2CO3–H2O2–H2O at 5 °C

Kinetics Analysis of Iron Oxide Reduction by Solid Carbon in HIsmelt Ironmaking Slag

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Determination and analysis of solid–liquid equilibria for ternary systems Na₂SO₄–H₂O₂–H₂O and Na₂CO₃–H₂O₂–H₂O at 5 °C