Thermodynamic Study on MnO Behavior in MgO-saturated Slag Containing FeO.

Jung, Seung Boo; Kim, Seon Hyo; Rhee, Chang Hee; Min, Dong

doi:10.2355/isijinternational.33.1049

Cited by 18 publications

(12 citation statements)

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“…When comparing to earlier literature data [22,26,27], the calculated values of manganese distribution coefficient between copper alloy and slag appear to be much lower in this study. Jung et al [26] studied the manganese distribution between Cu alloy and CaO-SiO 2 -Al 2 O 3 (13%)-MnO(5%)-MgO(17%) slag at 1500 • C and at oxygen partial pressure 2.71 × 10 −12 atm. Eom et al [27] investigated the manganese distribution between copper alloy and CaO-SiO 2 -Al 2 O 3 (14.7%)-MnO(7.5%) slag at 1500 • C and at oxygen partial pressure 2.75 × 10 −10 atm.…”

Section: Distributions Of Metals Between Copper Alloy and Slagsupporting

confidence: 60%

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Behavior of Battery Metals Lithium, Cobalt, Manganese and Lanthanum in Black Copper Smelting

et al. 2020

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Recycling of metals from different waste streams must be increased in the near future for securing the availability of metals that are critical for high-tech applications, such as batteries for e-mobility. Black copper smelting is a flexible recycling route for many different types of scrap, including Waste Electrical and Electronic Equipment (WEEE) and some end-of-life energy storage materials. Fundamental thermodynamic data about the behavior of battery metals and the effect of slag additives is required for providing data necessary for process development, control, and optimization. The goal of our study is to investigate the suitability of black copper smelting process for recycling of battery metals lithium, cobalt, manganese, and lanthanum. The experiments were performed alumina crucibles at 1300 °C, in oxygen partial pressure range of 10−11–10−8 atm. The slags studied contained 0 to 6 wt% of MgO. Electron probe microanalysis (EPMA) and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) techniques were utilized for phase composition quantifications. The results reveal that most cobalt can be recovered into the copper alloy in extremely reducing process conditions, whereas lithium, manganese, and lanthanum deport predominantly in the slag at all investigated oxygen partial pressures.

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Section: Distributions Of Metals Between Copper Alloy and Slagsupporting

confidence: 60%

“…The behavior of manganese in CaO-SiO 2 -FeO-MgO-MnO slag-molten iron system at oxygen partial pressure 2.7 × 10 −12 atm was investigated by Jung et al [26]. The results showed that the equilibrium distribution coefficient of Mn between slag and iron increases with increasing FeO concentration and decreases with increasing basicity.…”

Section: Contextmentioning

confidence: 99%

Behavior of Battery Metals Lithium, Cobalt, Manganese and Lanthanum in Black Copper Smelting

et al. 2020

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“…3, it is indicated that the distribution of manganese reached equilibrium in 8 h and that equilibrium Fe t O content showed a steady value after 12 h. Therefore, 12 h was used for the equilibrium among liquid silver, solid iron and slag under a CO/CO 2 gas mixture. 12) at the same oxygen partial pressure. This is thought to be due to the effect of MgO on the activity of Fe t O.…”

Section: Determination Of Equilibration Timementioning

confidence: 98%

Thermodynamic Properties of Manganese Oxide in BOF Slags.

2002

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It is necessary to understand the thermodynamic properties of MnO in steelmaking slags for the smelting reduction of Mn ore in BOF process. Studies of the manganese distribution between CaO-SiO 2 -Fe t O-MnO slags and liquid silver in equilibrium with solid Fe in the temperature range of 1 623 to 1 723 K were carried out under a CO/CO 2 atmosphere.The Fe t O content in (32.4ϳ36.3)%CaO-(31.6ϳ44.0)%SiO 2 -(9.9ϳ24.1)%FeO-(0.4ϳ2.6)%Fe 2 O 3 -(8.9ϳ 10.8)%MnO slags was found to have a linear relationship with oxygen partial pressure. The values of Fe 3ϩ /Fe 2ϩ in the same slag system increase by increasing the Fe t O content. The Mn distribution ratio between slag and metal, (%MnO)/[%Mn] Fe-C sat , increases with FeO content in a linear relationship over the measured FeO concentration range (6.7-24.1 mass%). The Mn distribution ratio decreases with increasing CaF 2 , which is believed to have the effect of increasing the activities of MnO and FeO.Temperature dependence of equilibrium manganese distribution at p O 2 ϭ6.6ϫ10 Ϫ12 atm in the temperature range of 1 623 to 1 723 K can be expressed as follows:The relative partial heat of solution of MnO into (32.7ϳ39.1)%CaO-(32.7ϳ38.8)%SiO 2 -(10.2ϳ20.78)%FeO-(1.0ϳ2.4)%Fe 2 O 3 -(9.4ϳ10.8)%-MnO slags was estimated to be 198 kJ/mol.

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“…Thus, the information about the Fe t O activity in magnesiowustite is of great importance because the Fe t O activity in magnesiowustite and liquid slag is identical in case the magnesiowustite is the actual saturation phase in equilibrium with liquid slag. The current authors have previously investigated the thermodynamic behaviors of manganese oxide in the CaO-SiO 2 -Fe t O-Al 2 O 3 -MnOMgO sat 13) by equilibrating the liquid slag with liquid silver and solid iron in a MgO crucible. And they also did the similar research for CaO-SiO 2 -Fe t O-MnO 14) slags in equilibrium with liquid silver in a Fe crucible.…”

Section: Measurement Of Fe T O Activitymentioning

confidence: 99%

The effect of FetO Content on MgO Solubilities in Lime-based Slags

Jung

Min

2010

ISIJ Int.

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It was attempted to quantitatively elucidate the effect of Fe t O content on MgO solubilities in lime-based slags using the measured data of MgO solubility in the slags. The magnesia capacities of the lime-based liquid slags were nicely correlated with the optical basicities in case the ideal solution was assumed for the magnesiowustite saturation phase which is actually in equilibrium with the slags. The substitution of MgO for CaO in lime-based slags increased the activity coefficient of Fe t O for the constant activity of Fe t O, resulting in decreasing Fe t O content in the slags. It is believed that the Fe t O activities in metallurgical slags containing iron oxide play the decisive role in determining the MgO solubilities into the slags.KEY WORDS: MgO solubility; magnesia capacity; optical basicity; activity; activity coefficient; interaction coefficient.

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Thermodynamic Study on MnO Behavior in MgO-saturated Slag Containing FeO.

Cited by 18 publications

References 1 publication

Behavior of Battery Metals Lithium, Cobalt, Manganese and Lanthanum in Black Copper Smelting

Behavior of Battery Metals Lithium, Cobalt, Manganese and Lanthanum in Black Copper Smelting

Thermodynamic Properties of Manganese Oxide in BOF Slags.

The effect of FetO Content on MgO Solubilities in Lime-based Slags

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