ORCID Profile
0000-0003-4628-8209
Current Organisation
University of Queensland
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Resource geoscience | Chemical engineering | Mineralogy and crystallography | Chemical Engineering Design | Exploration geochemistry | Powder and Particle Technology | Pyrometallurgy | Chemical Engineering | Pyrometallurgy | Mineral processing/beneficiation | Geology | Powder and particle technology
Basic Iron and Steel Products | Expanding Knowledge in Engineering | Management of Greenhouse Gas Emissions from Manufacturing Activities |
Publisher: Elsevier BV
Date: 11-2015
Publisher: Springer Science and Business Media LLC
Date: 12-03-2015
Publisher: Iron and Steel Institute of Japan
Date: 2016
Publisher: Informa UK Limited
Date: 21-05-2014
Publisher: Springer Science and Business Media LLC
Date: 21-11-2014
Publisher: Iron and Steel Institute of Japan
Date: 2015
Publisher: Springer Science and Business Media LLC
Date: 31-07-2018
Publisher: MDPI AG
Date: 13-12-2021
DOI: 10.3390/MET11122014
Abstract: The present study investigated phase equilibria in the Na2O-SiO2-WO3 system experimentally using high-temperature equilibration, quenching, and electron probe X-ray microanalysis (EPMA). New thermodynamic information on the Na2O-SiO2-WO3 system was derived based on the newly obtained experimental results and data from the literature. The primary phase fields of sodium metasilicate, sodium disilicate, and tridymite were determined along with the isotherms at 1073, 1173, and 1273 K. The solubilities of WO3 in SiO2, Na2Si2O5, and Na2SiO3, and the solubility of SiO2 in Na2WO4 were accurately measured using EPMA. Comparisons between the existing and newly constructed phase diagram were carried out and the differences are discussed. The phase equilibrium data will be beneficial to the future development of sustainable tungsten industries and thermodynamic modelling in WO3 related systems.
Publisher: Elsevier BV
Date: 07-2012
Publisher: Springer Science and Business Media LLC
Date: 10-06-2014
Publisher: Iron and Steel Institute of Japan
Date: 2016
Publisher: Springer Science and Business Media LLC
Date: 29-01-2016
Publisher: Springer Science and Business Media LLC
Date: 26-02-2013
Publisher: American Scientific Publishers
Date: 08-2014
Publisher: Elsevier BV
Date: 05-2017
Publisher: Springer Science and Business Media LLC
Date: 26-04-2021
Publisher: MDPI AG
Date: 18-12-2021
DOI: 10.3390/MET11122051
Abstract: Suitable MnS inclusions in gear steel can significantly improve the steel machinability and reduce the manufacturing costs. Two gear steel s les with different sulphur contents were prepared via aluminium deoxidation followed by calcium treatment. The shape, size, composition and percentage distribution of the inclusions present in the steel s les were analyzed using an electron probe micro-analysis (EPMA) technique. The average diameter of MnS precipitated on an oxide inclusion is less than 5 µm. It was found that the steel with high sulphur content contains a greater number of elongated MnS precipitates than low sulphur steel. Moreover, there are more oxide inclusions such as calcium-aluminates and spinels with a small amount of solid solution of (Ca,Mn)S in low content sulphur steel after calcium treatment, which indicates the modification of solid alumina inclusions into liquid aluminates. The typical inclusions generated in high sulphur steel are sulphide encapsulating oxide inclusions and some core oxides were observed as spinel. The formation mechanisms of complex inclusions with different sulphur and calcium contents are discussed. The results are in good agreement with thermodynamic calculations.
Publisher: Elsevier BV
Date: 04-2014
Publisher: Informa UK Limited
Date: 16-12-2021
Publisher: Springer Science and Business Media LLC
Date: 24-05-2009
Publisher: Springer International Publishing
Date: 2017
Publisher: Informa UK Limited
Date: 18-04-2022
Publisher: Iron and Steel Institute of Japan
Date: 15-08-2018
Publisher: Springer Science and Business Media LLC
Date: 13-02-2014
Publisher: MDPI AG
Date: 21-06-2023
DOI: 10.3390/MET13071153
Abstract: A laboratory study was carried out to better understand the factors that contribute to the formation of complex inclusions, as inclusions play an important role during steel production if not properly managed, inclusions can cause nozzle clogging during continuous casting and also damage the steel’s mechanical properties and machineability. To determine the chemical composition of inclusions that are less detrimental to the machineability of Al-deoxidized and Ca-treated gear steels, thermodynamic calculations and automated scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS), as well as electron probe micro-X-ray analysis (EPMA) with the wavelength dispersive spectroscopy (WDS) technique, were utilized. The findings demonstrated that the morphology of inclusions changed from irregular to a more spherical type and the composition also changed to dual oxy-sulfides from pure oxides and sulfides as the Ca concentration in the steel was increased up to 36 ppm. The amount of Pure MnS sulfides also reduced significantly after Ca treatment. The ternary phase diagram and stability diagram for the inclusions revealed that 15–25 ppm Ca is the optimal range for the modification of both oxides and sulfides into the desired morphology and composition under the stipulation that the concentration of O in the steel is maintained at or below 50 ppm.
Publisher: MDPI AG
Date: 17-04-2020
DOI: 10.3390/MIN10040360
Abstract: Polymetallic nodules are promising resources for the extraction of valuable metals such as copper, nickel, and cobalt, as well as manganese alloys. To achieve efficient extraction of useful metals from the emerging resource, high-temperature carbothermic reduction of nodules was investigated by optimizing the reductant addition, slag and alloy systems. Thermochemical software FactSage was used to predict the liquidus temperature of the slag system, which is not sensitive to FeO, CaO and Al2O3, but decreases significantly with decreasing MnO/SiO2 mass ratio. The experiments were designed to reduce the oxides of Cu, Co and Ni completely, and reduce FeOx partially depending on the amount of graphite addition while leaving the residual slag for further processing into ferromanganese and/or silicomanganese alloys. Co, Cu and Ni concentrations in the alloy decreased with increasing graphite addition. The optimal reduction condition was reached by adding 4 wt% graphite at the MnO/SiO2 mass ratio of 1.6 in slag. The most effective metal-slag separation was achieved at 1350 °C, which enables the smelting reduction to be carried out in various furnaces.
Publisher: IOP Publishing
Date: 29-04-2009
Publisher: Iron and Steel Institute of Japan
Date: 2016
Publisher: Elsevier BV
Date: 2019
Publisher: Iron and Steel Institute of Japan
Date: 2016
Publisher: MDPI AG
Date: 17-03-2022
DOI: 10.3390/MET12030511
Abstract: To understand and clarify the formation mechanisms and evolution of complex inclusions in Ti-Ca deoxidized offshore structural steel, inclusions in industrial steel were systematically investigated. The number density of total inclusions generally decreased from Ladle Furnace (LF), Vacuum Degassing (VD), Tundish to the final product except for Ti and Ca addition. The major inclusions during the refining process were CaO-Al2O3-SiO2-(MgO)-TiOx and CaO-Al2O3-SiO2. CaO-Al2O3-SiO2-(MgO)-TiOx inclusion initially originated from the combination of CaO-SiO2-(MgO) in refining slag or refractory and deoxidization product Al2O3 and TiO2. With the refining process proceeding and Ca addition, the Al2O3 concentration in the CaO-Al2O3-SiO2-(MgO)-TiOx inclusions gradually dropped while the CaO and TiO2 concentrations gradually increased. The CaO-Al2O3-SiO2 inclusions originally came from refining slag, existing as 2CaO∙ Al2O3∙ SiO2, and maintained a liquid state during the early stage of LF. After Ca treatment, it was gradually transferred to 2CaO∙ SiO2 due to Al2O3 continuously being reduced by Ca. The liquidus of 2CaO∙ SiO2 inclusion was higher than that of molten steel, so they presented as a solid-state during the refining process. After welding thermal simulation, CaO-Al2O3-SiO2-(MgO)-TiOx inclusions were proven effective for inducing intragranular acicular ferrite (IAF) while CaO-Al2O3-SiO2 was inert for IAF promotion. Additionally, Al2O3-MgO spinel in multiphase CaO-Al2O3-SiO2-(MgO)-TiOx inclusion has different formation mechanisms: (1) initial formation as in idual Al2O3-MgO spinel as a solid-state in molten steel (2) and it presented as a part of liquid inclusion CaO-Al2O3-SiO2-(MgO)-TiOx and firstly precipitated due to its low solubility.
Publisher: Elsevier BV
Date: 05-2019
Publisher: MDPI AG
Date: 24-10-2022
DOI: 10.3390/MET12111801
Abstract: During continuous casting, argon blowing from tundish cover (ABTC) can greatly prevent the flow of the remaining air and decrease the reoxidation of molten steel in tundish. In the current study, a numerical model based on a tundish of a two-strand slab continuous casting machine was established to investigate the feasibility and evaluate the protective casting effect of the ABTC process. The influence of operation parameters, including sealing schemes of tundish cover holes and the argon flow rate of the remaining oxygen content, were studied in tundish. Then, industrial trials based on the operation parameters from the numerical model were carried out to evaluate the protective effect of ABTC. The results indicate that the ABTC process has a great protective effect in avoiding increasing levels of nitrogen and losing titanium and aluminum. With the ABTC process applied, the average increment of nitrogen (△w[N]) in steel from the end of RH to tundish decreases by 90% from 10 × 10−6 to 1 × 10−6, the average loss of titanium (△w[Ti]) by 12.7% from 63 × 10−6 to 55 × 10−6, and the amount of aluminum (△w[Al]) decreases by 7.1% from 70 × 10−6 to 55 × 10−6. The injecting hole and baking holes should be sealed during the period of empty tundish to efficiently discharge the air. In order to ensure that the oxygen volume fraction in tundish is less than 1%, the argon flow rate should be ≥220 Nm3/h during the period of empty tundish and ≥80 Nm3/h during the period of normal casting.
Publisher: Elsevier BV
Date: 11-2018
Publisher: MDPI AG
Date: 23-05-2022
DOI: 10.3390/MET12050885
Abstract: Modern blast furnaces with extensive operational volume demand better-quality iron agglomerates as feed for stable operation. Sinter is the principal feed used in blast furnaces across Asia. Liquid generated during the sintering process plays an essential role in the coalescence of the sinter blend and in sinter quality. Therefore, an estimation of liquid properties at peak bed conditions during sintering helps manage sintering liquid behaviour, leading to better control of final sinter properties. In this study, three different iron sinters were reheated to sinter bed conditions, followed by quenching. Electron probe X-ray microanalysis (EPMA) was used to identify the resultant phases and quantify their chemical compositions. The impact of sinter bulk compositions was analysed, especially on sintering liquid properties. Furthermore, experiments were conducted to study the softening and melting behaviour of the sinters, and the cohesive range of the sinters was identified. Finally, the effect of the sinter bulk compositions on sintering liquid properties and softening behaviour is detailed.
Publisher: Informa UK Limited
Date: 20-11-2014
Publisher: Springer Science and Business Media LLC
Date: 09-03-2017
Publisher: Springer Science and Business Media LLC
Date: 16-01-2019
Publisher: Springer Science and Business Media LLC
Date: 18-12-2018
Publisher: Informa UK Limited
Date: 2011
Publisher: Informa UK Limited
Date: 11-2010
Publisher: Springer International Publishing
Date: 2019
Publisher: Elsevier BV
Date: 08-2013
Publisher: Springer Science and Business Media LLC
Date: 28-09-2015
Publisher: Springer Science and Business Media LLC
Date: 13-07-2016
Publisher: Springer Science and Business Media LLC
Date: 02-05-2018
Publisher: Elsevier BV
Date: 11-2023
Start Date: 09-2023
End Date: 09-2026
Amount: $595,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 01-2024
End Date: 01-2029
Amount: $5,000,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2023
End Date: 12-2027
Amount: $5,000,000.00
Funder: Australian Research Council
View Funded Activity