Experimental investigation of gas-matte-spinel and gas-slag-matte-spinel equilibria in the Cu-Fe-O-S-Si system at 1200°C: effect of SO<sub>2</sub> partial pressure

Sineva, Svetlana; Hidayat, Taufiq; Fallah-Mehrjardi, Ata; Старых, Р. В.; Hayes, Peter C.; Jak, Evgueni

doi:10.1080/25726641.2021.1919375

Cited by 4 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[16], indicates that the oxidation states of the slag and matte represent higher oxygen partial pressures in FSF than those in the bath smelting processes producing the same matte grade. [63] This feature appears from the fact that the properties of copper mattes, such as p(S 2 ) and [pct S], are essentially constant at each matte grade, [64] but the increased sulfur dioxide partial pressure is compensated by a higher oxygen partial pressure of the system. The increasing oxygen concentration dissolved in matte has a minor impact on this process.…”

Section: B Mechanism Of Slag and Matte Formationmentioning

confidence: 99%

Reaction Sequences in Flash Smelting and Converting Furnaces: An In-depth View

Taskinen

2021

Metall Mater Trans B

View full text Add to dashboard Cite

Flash smelting and flash converting are mature technologies in copper and nickel sulfide smelting. The sensitivity of operation concerning the furnace design is evident. It is obvious that when two unit operations are carried out in separate spaces in the same furnace, skills related to maintenance of suspension oxidation of fine minerals, fluxing, fluid as well as heat flows and the overall energy balance are required. Despite these fundamental features, the flow-sheet wide understanding of linking the suspension oxidation of sulfides with the subsequent smelting processes in the furnace as well as the chemistry of its off-gas train is largely absent in the scientific literature. This review gives a detailed outlook on the microscale phenomena in flash smelting and flash converting furnaces accumulated during the last decades. It connects their vital features and chemistries with the reaction tendencies and heat fluxes in the different parts and reaction zones of the furnace as well as in the off-gas train from the smelter to the acid plant. Graphic Abstract

show abstract

Section: B Mechanism Of Slag and Matte Formationmentioning

confidence: 99%

Reaction Sequences in Flash Smelting and Converting Furnaces: An In-depth View

Taskinen

2021

Metall Mater Trans B

View full text Add to dashboard Cite

show abstract

“…Literature review showed that phase diagram studies of pyrometallurgical slag systems were predominant. [10][11][12][13][14][15][16][17][18][19][20][21] But there was a lack of systematic understanding about the transformation behavior of ZnFe2O4 spinel. In this paper, the transformation behavior of ZnFe2O4 spinel particles in CaO-FeXO-SiO2-ZnO slag system has been systematically studied with high-temperature phase equilibrium experimental technique.…”

Section: Introductionmentioning

confidence: 99%

The transformation behaviour of ZnFe₂O₄ spinel particles in the CaO-Fe_xO-SiO₂-ZnO slag system

Wang,

Xu,

Wang

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Treating zinc hydrometallurgical residues and other Zn-bearing solid waste in direct lead smelting processes has been recognized as the preferred solution for the sustainable development of the lead and zinc industry. However, new technical problems occurred when changing the starting material of lead-making processes, the pyrometallurgical process for treating zinc hydrometallurgical residues and zinc bearing solid waste usually had the CaO-FexO-SiO2-ZnO slag. Along with the increasing of Zn content in the raw material, high ZnO slag formed, and the ZnFe2O4 spinel particles intended to precipitate from the molten slag. The understanding of the particle behaviour of ZnFe2O4 spinel was the core part of monitoring the slag properties. This study investigated the transformation behaviour of zinc ferrite spinel particles and the changes in glassy slag phase through the high-temperature phase equilibrium experimental technique, and the temperature was 1100 °C-1300 °C and the oxygen potential was 10−8 atm – 10−4 atm. It is found that the particle size of ZnFe2O4 spinel in the molten slag increased along with the increasing of the oxygen potential. The Zn/Fe mass ratio in spinel particles decreased when increasing of temperature and it increased when increasing of oxygen potential. The Fe/SiO2 mass ratio and the Zn content in glassy slag phase gradually increased along with increasing temperature and they decreased along with increasing oxygen potential. The growing and decomposition of ZnFe2O4 spinel was essentially a process of material exchange with the glassy slag phase.

show abstract

Experimental Study of the Combined Effects of Al2O3, CaO and MgO on Gas/Slag/Matte/Spinel Equilibria in the Cu–Fe–O–S–Si–Al–Ca–Mg System at 1473 K (1200ºC) and p(SO2) = 0.25 atm

Sineva

Shishin

Shevchenko

et al. 2023

J. Sustain. Metall.

View full text Add to dashboard Cite

The combined effects of Al2O3, CaO and MgO slagging components on phase equilibria and thermodynamics in the basic Cu–Fe–O–S–Si system have been evaluated at 1473 K (1200 ºC) and p(SO2) = 0.25 atm for a range of oxygen partial pressures and matte compositions. The experimental technique included high-temperature equilibration of the samples on a spinel substrate under controlled gas atmosphere (CO/CO2/SO2/Ar), followed by rapid quenching and subsequent measurement of the equilibrium phase compositions using Electron Probe X-ray Microanalysis (EPMA). The experimental data have been compared with the results of thermodynamic calculations undertaken using FactSage software and an internal thermodynamic database. Both the experimental results and the calculations results revealed that the presence of Al2O3, CaO and MgO reduced both the sulphur and copper concentrations in the slag phase for a given set of process conditions. The data have been used for further optimisation of the parameters of the thermodynamic database describing multicomponent metallurgical systems. The resulting thermodynamic database is capable of predicting, with high accuracy, the phase equilibria and the distribution of all elements between the phases in the Cu–Fe–O–S–Si–(Al, Ca, Mg) system. Graphical Abstract

show abstract

Experimental investigation of gas-matte-spinel and gas-slag-matte-spinel equilibria in the Cu-Fe-O-S-Si system at 1200°C: effect of SO₂ partial pressure

Cited by 4 publications

References 19 publications

Reaction Sequences in Flash Smelting and Converting Furnaces: An In-depth View

Reaction Sequences in Flash Smelting and Converting Furnaces: An In-depth View

The transformation behaviour of ZnFe₂O₄ spinel particles in the CaO-Fe_xO-SiO₂-ZnO slag system

Experimental Study of the Combined Effects of Al2O3, CaO and MgO on Gas/Slag/Matte/Spinel Equilibria in the Cu–Fe–O–S–Si–Al–Ca–Mg System at 1473 K (1200ºC) and p(SO2) = 0.25 atm

Contact Info

Product

Resources

About

Experimental investigation of gas-matte-spinel and gas-slag-matte-spinel equilibria in the Cu-Fe-O-S-Si system at 1200°C: effect of SO2 partial pressure

Cited by 4 publications

References 19 publications

Reaction Sequences in Flash Smelting and Converting Furnaces: An In-depth View

Reaction Sequences in Flash Smelting and Converting Furnaces: An In-depth View

The transformation behaviour of ZnFe2O4 spinel particles in the CaO-FexO-SiO2-ZnO slag system

Experimental Study of the Combined Effects of Al2O3, CaO and MgO on Gas/Slag/Matte/Spinel Equilibria in the Cu–Fe–O–S–Si–Al–Ca–Mg System at 1473 K (1200ºC) and p(SO2) = 0.25 atm

Contact Info

Product

Resources

About

Experimental investigation of gas-matte-spinel and gas-slag-matte-spinel equilibria in the Cu-Fe-O-S-Si system at 1200°C: effect of SO₂ partial pressure

The transformation behaviour of ZnFe₂O₄ spinel particles in the CaO-Fe_xO-SiO₂-ZnO slag system