Article
Materials Science, Multidisciplinary
Ziwen Yan, Zhiyin Deng, Miaoyong Zhu
Summary: Laboratory experiments were conducted to investigate the effect of adding CaCl2 on the penetration behavior of BOF slags in MgO refractory. The results showed that the penetration depth increased with experimental time. The addition of CaCl2 enhanced the penetration depth by reducing the viscosity, surface tension, and contact angle of the slag. Improved fluidity and wettability were identified as the main reasons for the increased penetration depth. The degradation of MgO refractory by CaCl2-added BOF slag was discussed, with both chemical reactions and slag penetration playing a role. The structure of the MgO refractory significantly influenced the degradation, as the addition of CaCl2 had differing effects on dense and porous refractory.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jun Gil Yang, Joo Ho Park, Ji Yeon Kang, Hyun Sik Park, Joo Hyun Park
Summary: The study found that gold solubility in the CaO-SiO2-Al2O3-Fe2O3 slag system increases with increasing slag basicity, while the influence of Fe2O3 and Al2O3 on gold solubility is minimal. Gold is stabilized as the aurate complex ion, and its dissolution reaction into the slag was proposed.
Article
Metallurgy & Metallurgical Engineering
Ziwen Yan, Zhiyin Deng, Miaoyong Zhu
Summary: The addition of CaCl2 and increasing slag basicity can enhance the proportion of C2S-C3P solid solution in the slag, but decrease the phosphorus content in C2S-C3P. A new P-rich phase Ca5Cl(PO4)3 (C5P3Cl) can be observed in high-basicity slags, while higher contents of CaCl2 and P2O5 further promote the proportion of C5P3Cl.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jaesung Lee, Seungjae Park, In-Ho Jung
Summary: The composition of co-saturated slag in the CaO-MgO-Al2O3 system was determined using quenching experiments, and a thermodynamic re-assessment of the system was performed.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Thermodynamics
Min Chen, Katri Avarmaa, Pekka Taskinen, Radoslaw Michallik, Ari Jokilaakso
Summary: The equilibrium phase relations between metallic copper alloys and magnetite/wustite-saturated iron silicate slags were investigated. The experimental results were compared with data from the literature and thermodynamic assessment to improve copper matte and black copper converting processes.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Materials Science, Ceramics
Yannan Wang, Shuigen Huang, Bart Blanpain, Muxing Guo
Summary: The solubility of CaO in the FeOt-SiO2-CaO-Al2O3-(ZnO, Cr2O3) system was investigated under different conditions. The results showed that the solubility of CaO increases with the decrease of the FeO/SiO2 ratio, and excessive CaO addition results in the precipitation of specific phases.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Guoxing Ren, Songwen Xiao, Longgong Xia, Caibin Liao, Zhihong Liu
Summary: In the smelting reduction process, the solubility of cobalt in slag is influenced by the concentration of cobalt in the alloy, oxygen partial pressure, and cobalt oxide concentration in the slag, which subsequently affects the activity coefficient of CoO in the slag.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Takashi Murata, Katsunori Yamaguchi
Summary: The distribution of Rh, Pd, and Pt between molten metals (Cu, Pb) and corresponding metal oxide-based (CuO0.5, PbO) slags was investigated. The addition of SiO2 or CaO, up to a maximum concentration of 20 mass pct, reduced the oxygen partial pressure in the system. The addition of an optimum amount of SiO2 or CaO effectively reduced the concentrations of PGMs in the slags to less than approximately 1/10 of those without adding SiO2 or CaO.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Tae Sung Kim, Joo Hyun Park
Summary: The study found that iron oxide can affect the viscosity of aluminate slag, especially by effectively breaking the aluminate network structure when added at low iron oxide content.
ISIJ INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Md Khairul Islam, Michael Somerville, Mark I. Pownceby, James Tardio, Nawshad Haque, Suresh Bhargava
Summary: The phase equilibria of CaO-Al2O3-SiO2-Na2O slags were studied by thermal equilibration and quenching, identifying primary phases and quantifying the solid solubility of Na2O in the phases. The presence of Na2O substantially changed the slag liquidus temperature and affected the primary phases.
Article
Materials Science, Ceramics
Wei Liu, Ling Wang, Baozhong Ma, Chengyan Wang, Fengqin Liu, Yongqiang Chen
Summary: This study investigates the corrosion behavior of magnesia-chrome refractories immersed in copper converter slags at different temperatures. It proposes a novel approach to prolong the lifetime of the furnaces based on the understanding of the corrosion mechanism.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Longlong Geng, Su An, Xiaoli Wang, Jianbing Chen, Zhongmin Liu, Xiuling Zhang, Da-Shuai Zhang, Yong-Zheng Zhang, Thomas Wagberg, Guangzhi Hu
Summary: A grafting and thermal strategy was adopted to immobilize copper oxide nanoparticles on carbon nanofiber, resulting in enhanced catalytic activity for the reduction of toxic nitrophenols due to the defect-rich surface and valence-mixed composition of the CuOx species.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Tae Sung Kim, Joo Hyun Park
Summary: This study investigated the effect of Al2O3 addition on the viscosity of iron-compound bearing CaO-SiO2-Al2O3-MgO slags with different SiO2 contents (=30, 40, and 50 wt%). The addition of Al2O3 increased the viscosity of the calcium-aluminosilicate melts. The fraction of Fe2+ increased with the addition of Al2O3 in low-SiO2 content (=30 wt%) slags, while the fraction of Fe3+ increased in high-SiO2 content (=50 wt%) slags. The addition of Al2O3 also polymerized the silicate networks in the slag, and the viscosity of the melt was influenced by the degree of polymerization within the aluminosilicate networks.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Georgii Khartcyzov, Maksym Shevchenko, Siyu Cheng, Peter C. Hayes, Evgueni Jak
Summary: This study provides fundamental information on the reactions between slags and refractory materials in metallurgical furnaces through the phase equilibria studies of the CuO0.5-CaO-SiO2 system. The experimental determination of phase compositions and liquidus surface of the system contributes to the optimization of thermodynamic database for copper-containing systems.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Lei Zhang, Kaixi Jiang, Feng Xie, Diankun Lu
Summary: The viscosity and conductivity of smelting slag of copper oxide concentrate play a crucial role in reducing the operating temperature. In this study, slag samples with different ferrous oxide contents were prepared and their viscosity and conductivity were measured. The results showed that the change in slag composition affects its viscosity and conductivity.
Article
Green & Sustainable Science & Technology
Michael Somerville, Sharif Jahanshahi
Editorial Material
Materials Science, Multidisciplinary
Kathie McGregor, Michael Somerville
Article
Green & Sustainable Science & Technology
Michael Somerville, Alexandre Deev
Article
Materials Science, Multidisciplinary
Md Khairul Islam, Michael Somerville, Mark I. Pownceby, James Tardio, Nawshad Haque, Suresh Bhargava
Summary: The phase equilibria of CaO-Al2O3-SiO2-Na2O slags were studied by thermal equilibration and quenching, identifying primary phases and quantifying the solid solubility of Na2O in the phases. The presence of Na2O substantially changed the slag liquidus temperature and affected the primary phases.
Article
Green & Sustainable Science & Technology
Md Khairul Islam, Mark Pownceby, Michael Somerville, James Tardio, Nawshad Haque, Suresh Bhargava
Summary: This study investigated the phase equilibria in the CaO-Al2O3-SiO2 ternary system doped with B2O3 using high-temperature equilibration and rapid quenching technique. The results showed that B2O3 can effectively lower the liquidus temperature, suggesting its potential as a fluxing agent for reducing the smelting temperature in the CaO-Al2O3-SiO2-B2O3 quaternary system.
JOURNAL OF SUSTAINABLE METALLURGY
(2022)
Article
Mining & Mineral Processing
Steven Wright, Shouyi Sun, Sharif Jahanshahi
Summary: New lead volatilisation rate and activity data in low-Pb copper mattes were determined through high-temperature experiments. Lead volatilisation rate measurements were carried out at temperatures from 1200 to 1570 degrees C. The concentration of lead in the melts covered a range of 200-6 mg.kg(-1). The rate data exhibited first order behavior with respect to concentration of Pb, with the vapour pressure of Pb in the gas being dependent on its concentration in melts and in accord with equilibrium data on mattes at similar temperatures.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY-TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY
(2023)
Proceedings Paper
Green & Sustainable Science & Technology
Md Khairul Islam, Nawshad Haque, Michael Somerville, Mark Pownceby, Suresh Bhargava, James Tardio
Summary: This article analyzes Bangladesh's export-import data to predict the generation of e-waste from four types of discarded electronic devices and evaluates the potential value of e-waste.
REWAS 2022: DEVELOPING TOMORROW'S TECHNICAL CYCLES, VOL I
(2022)
Article
Mining & Mineral Processing
Yuhua Pan, Michael Somerville, David Langberg
Summary: This study investigated splashing phenomena in TSL furnaces through experiments and a physical model. An empirical correlation established based on dimensional analysis can be potentially applied to predict splashing behavior under high temperature smelting conditions.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY-TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY
(2022)
Proceedings Paper
Metallurgy & Metallurgical Engineering
Md Khairul Islam, Nawshad Haque, Michael A. Somerville
Summary: The study focused on utilizing printed circuit boards collected from Bangladesh to recover valuable metals, ceramics, and other components. A simple three-stage process was designed to successfully recover metals such as copper, silver, gold, and tin.
TMS 2021 150TH ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2021)
Proceedings Paper
Metallurgy & Metallurgical Engineering
Md Khairul Islam, Michael Somerville, Mark Pownceby, James Tardio, Nawshad Haque, Suresh Bhargava
Summary: Designing appropriate slag systems based on major elemental components in e-waste can lower the liquidus temperature and improve operational efficiency. The addition of Na2O significantly decreases the liquidus temperature of the slags in the anorthite phase field, shifting the slag composition towards the pseudo wollastonite region.
RARE METAL TECHNOLOGY 2021
(2021)
Article
Green & Sustainable Science & Technology
Michael Somerville, R. Davidson, S. Wright, S. Jahanshahi
JOURNAL OF SUSTAINABLE METALLURGY
(2017)
Proceedings Paper
Metallurgy & Metallurgical Engineering
Paul Voigt, Alistair Burrows, Michael Somerville, Chunlin Chen
8TH INTERNATIONAL SYMPOSIUM ON HIGH-TEMPERATURE METALLURGICAL PROCESSING
(2017)
Article
Green & Sustainable Science & Technology
Michael A. Somerville
JOURNAL OF SUSTAINABLE METALLURGY
(2016)
Review
Green & Sustainable Science & Technology
Sharif Jahanshahi, John G. Mathieson, Michael A. Somerville, Nawshad Haque, Terry E. Norgate, Alex Deev, Yuhua Pan, Donsheng Xie, Phillip Ridgeway, Paul Zulli
JOURNAL OF SUSTAINABLE METALLURGY
(2015)