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Introduction
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November 2017 - present
Education
November 2017 - March 2021
September 2014 - July 2017
September 2010 - June 2014
Publications
Publications (33)
The extraction of cobalt from secondary resources has become crucial, as cobalt has been identified as a strategically important and critical raw material due to the high risks of supply chain disruptions. In this work, selective sulfation roasting was investigated as a potential recycling strategy to extract cobalt and lithium from an industrial l...
The flash smelting process utilizes the rapid oxidation of micron-sized sulfide particles in an oxygen-enriched atmosphere to achieve high-yield continuous copper extraction. However, as production capacity increases, the emergence of unreacted particles and a downward shift in the intensely reactive region indicate a decline in heat and mass trans...
The suspension smelting oxidation step has favourable conditions to generate chemical flue dust from the low-boiling elements of the feed mixture due to the high particle temperatures in the reaction shaft where combusting sulphide mineral particles reach temperatures above the melting point of magnetite. Arsenic, antimony, lead, and zinc are commo...
Waste electrical and electronic equipment (WEEE) contains various valuable metals, making it a potential secondary resource for sustainable metal usage. Pyrometallurgical smelting is an efficient technique to recycle WEEE by extracting precious metals into copper matte and removing impurities into slags. The impact of WEEE impurities such as CaO an...
A series of industrial experiments were conducted, not only to reveal the distribution and evolution of particle mass and size inside the flash converting furnace, but also to investigate the influence of airflows on the particle distribution. The results showed that the average size of particles grows 2−3 times when falling through the reaction sh...
Arsenic is a common impurity element in sulfide concentrates. It tends to accumulate in the flue dust of smelting furnace due to the volatility and internal circulation of the flue dust practiced in the smelting-converting process chain. The only outlets for arsenic are anodes and discard slag. Arsenic condensation in dust-free conditions was studi...
Extraction of cobalt from secondary resources has become crucial as cobalt has been identified as strategically important and critical raw material due to high risks in supply chain disruptions. In this work, a novel route has been investigated for selective extraction of cobalt from spent industrial lithium cobalt oxide (LCO)-rich battery scrap. I...
The Cu-As-containing filter cake waste and black copper sludge are the main by-products, besides sulphuric acid and slag, in copper production. To achieve sustainability in copper making and satisfy more strict environmental requirements, this study discusses the possibility of feeding them back into the smelting step. By collecting samples of filt...
The increasing concentrations of metallic Al or Al2O3 in secondary copper resources like electronic wastes motivate research into the slag chemistry of high-Al2O3 iron silicate slags for optimizing the industrial smelting process. In this study, the effect of Al2O3 in slag on the phase equilibria of the FeOx-SiO2-Al2O3 slag system was experimentall...
• Objectives and Scope • The quality and copper grade of copper concentrates have been on decline over decades, copper and iron bearing impurity minerals such as arsenopyrite (FeAsS), enargite (Cu 3 AsS 4), and tennantite (Cu 13 As 4 S 12), have become increasingly common in the commodity trading. • Arsenic is a common and hazardous impurity elemen...
The equilibrium phase relations of the MgO-CaO-TiO2 system were investigated at 1500-1600°C in air using the high-temperature isothermal equilibration of samples in platinum crucibles followed by the rapid quenching technique. The phase compositions were analyzed using an electron probe X-ray microanalyzer (EPMA). The isothermal sections at 1500°C...
The phase relations of TiOx containing systems in reducing atmospheres are extremely important for understanding the smelting process for vanadium titano-magnetite. In the present work, the equilibrium phase relations for the core CaO-SiO2-Ti3O5 system at 1400 °C and oxygen partial pressure of 10−16 atm were determined. Ti3O5 was confirmed as the s...
We investigated the phase relations of the SiO2-MgO-TiO2 system in air at 1500 °C using the high-temperature isothermal equilibration/quenching technique, followed by x-ray diffraction measurements and direct phase analysis using scanning electron microscopy coupled with x-ray energy dispersive spectrometry. One single liquid phase domain, five two...
A promising copper–cobalt slag cleaning technique has been proposed, involving employing gypsum wastes as a sulfurizing agent to sulfurize copper, cobalt, and iron and enrich a condensed matte from copper–cobalt slag. This work thermodynamically investigated the phase conversion mechanism in the Cu2O–CoO–Fe3O4–FeO–CaSO4–C system, at the same time,...
The recycling and recovery of precious metals from secondary materials, such as waste-printed circuit boards, are an important area of circular economy research due to the limited existing resources and increasing amount of e-waste produced by the rapid development of technology. In this study, the kinetic behavior of precious metals Au, Ag, Pt, an...
The research presents an effective approach to achieve the selective separation of rare earth elements (REEs) from waste Nd-Fe-B magnets. Investigations show that the use of a two-stage roasting process can significantly reduce the amount of ammonium sulfate required and improve the separation efficiencies of REEs. During the first low-temperature...
The combined processing of industrial wastes of titania-bearing slags with coal fly ash is an important part of the circular economy. In the present work, the effect of Al2O3 on the 1400 °C liquidus isotherms of the perovskite, rutile and tridymite primary phase fields in the CaO-SiO2-TiO2-Al2O3 system has been determined by employing a high-temper...
A potential industrial waste-waste co-treatment process was proposed and verified for the recovery of the valuable metals Co, Ni, and Cu from copper smelting slag by utilizing high temperature SO2 off-gas. Sulfation roasting followed by water leaching under designed thermodynamic conditions was conducted to facilitate the selective formation of Co,...
In the Selective Crystallization and Phase Separation (SCPS) process, manganese oxide is used as an additive to promote the precipitation of perovskite. However, the influence of manganese oxide on the liquid domain of the perovskite primary phase field is still unclear. In the present work, the liquid-perovskite equilibrium with the addition of 0-...
Feeding Waste Printed Circuit Boards (WPCBs) into existing pyrometallurgical processes is developing as an easy-to-adapt and efficient way to recycle them. To fulfill sustainability and circular economy targets, kinetics and distributions are the key factors when recovering metals and trace elements from WPCBs. We investigated the reaction mechanis...
Due to the importance of the physicochemical properties of slag in the recovery of low-titanium ores and by-products, the equilibrium phase relationships of the CaO-MgO-Al 2 O 3-SiO 2-TiO 2 system were experimentally determined using a high-temperature equilibration and quenching method at 1300°C and 1400°C. The equilibrium information was obtained...
Recycling metals from secondary materials and more complex ores has recently been attracting more attention, creating a need for more precise separation methods of different elements. This study proposed a sulfation-roasting method and designed thermodynamic conditions to selectively facilitate the formation of copper sulfate while separating iron...
The equilibrium phase relations and liquidus contours for the TiOx-containing oxide system in reducing atmospheres are of importance in understanding the smelting process of Ti-containing resources. Equilibrium - quenching experiments were conducted at 1400 °C for the CaO–SiO2-TiOx system at oxygen partial pressure of 10⁻¹⁰ atm controlled by a CO/C...
Due to the importance of the physicochemical properties of slag in the recovery of low-titanium ores and by-products, the equilibrium phase relationships of the CaO-MgO-Al2O3-SiO2-TiO2 system were experimentally determined using a high-temperature equilibration and quenching method at 1300°C and 1400°C. The equilibrium information was obtained by s...
Improving metal-slag separation in pyrometallurgical processes is increasingly important. Due to the harsh conditions, direct observations of the molten phases behavior in the settler of the Outotec Flash Smelting Furnace (FSF) are not possible and the ways to improve metal settling can only be studied by simulation and modeling. This study focuses...
The target of present investigation is to reveal the behavior of WEEE metallic elements through experiments in a lab-scale furnace related to flash furnace smelting. WEEE materials are added to the laboratory furnace along with chalcopyrite ore and synthetic slag to monitor the reaction of metallic elements and their migration simulating what is ha...
The amount of waste electrical and electronic equipment (WEEE) in the world has grown
rapidly during recent decades, and with the depletion of primary ores, there is urgent need for industries to study new sources for metals. Waste printed circuit boards (WPCB) are a part of WEEE, which have a higher concentration of copper and precious metals when...
