A5028765511- Metallurgical Processes and Thermodynamics
- Iron and Steelmaking Processes
- Aluminum Alloys Composites Properties
- Aluminum Alloy Microstructure Properties
- Bauxite Residue and Utilization
- Semiconductor materials and interfaces
- Metal Extraction and Bioleaching
- Mineral Processing and Grinding
- Extraction and Separation Processes
- Advanced Materials Characterization Techniques
- Advanced ceramic materials synthesis
- Silicon and Solar Cell Technologies
- Minerals Flotation and Separation Techniques
- Radiative Heat Transfer Studies
- Microstructure and mechanical properties
- Photovoltaic Systems and Sustainability
- Silicon Carbide Semiconductor Technologies
- Recycling and utilization of industrial and municipal waste in materials production
- Geoscience and Mining Technology
- Graphite, nuclear technology, radiation studies
- Catalysts for Methane Reforming
Norwegian University of Science and Technology
2020-2024
University of Science and Technology Beijing
2013-2016
RWTH Aachen University
2014
In this paper, the separation of phosphorus from metallurgical-grade silicon was investigated based on an Mg alloying and HCl leaching approach. Experimental results show that P concentration reduced initial 15.1 ppmw to 0.2 with also large extent removal metallic impurities by two times alloying-leaching purification. The mechanism enhanced is clarified owing strong affinity between P, which validated SIMS elemental mapping. A two-parameter analytical model developed predict degree...
As global demand for silicon (Si) and alumina continues to surge, the significance of developing more sustainable production methods has intensified. The SisAl process represents a path-breaking approach producing Si by utilizing side streams from aluminum industries. In present work, comprehensive series pilot-scale trials was conducted assess scalability validity process. influences reductant raw materials, charging methods, input material ratios, other processing parameters were also...
Phosphorus (P) is a critical impurity in metallurgical-grade Si that needed to be removed for solar-grade production. The Si-Ca-Al-P system one of the most crucial alloy systems refining, where P can separated by either Si-Al solvent refining or Si-Ca alloying-leaching process. In this work, series Si-Ca-Al alloys were obtained investigate role composition and CaAl2Si2 phase segregation separation. used alumina crucible led heavy Al contamination resulted unexpected compositions. CaSi2 found...
In the present work, a comparative study of silicon alloying–leaching purification process was carried out on recently developed Mg–Si system, Ca–Si and novel ternary Ca–Mg–Si system. Insights were provided into integrated from aspects thermodynamic assessment, microstructural analysis, experimental observation, computational simulation, analytical modeling. The main silicide precipitates three Mg–Si, Ca–Si, alloys studied determined as Mg2Si, CaSi2, Ca7Mg7.5±δSi14, respectively. Other...
It is imperative in the photovoltaic (PV) industry to establish a circular materials flow for more sustainable solar silicon production. In present work, series of K2O-SiO2 binary and K2O-CaO-SiO2 ternary slags were examined combination purification Si-kerf waste recycling. The study revealed that mass transfer mechanism slag composition variation predominantly due silicothermic reduction K2O. boron removal degree achieved high level at approximately 80% most tests, with gasification as...
Abstract Boron (B) and phosphorus (P) are the most problematic impurities to be removed in production of solar-grade silicon by metallurgical process. In this work, distribution B P between CaO-(La 2 O 3 )-SiO slags Si-10 mass pct Sn melt was experimentally studied. coefficient increased from 2.93 binary CaO-SiO slag 3.33 3.65 with 10 La additions, respectively. followed acid-leaching experiments, slag-treated Si-Sn alloys exhibited higher removal than that initial alloy without treatment....
In this work, Si-Ca-Mg alloys were made with different compositions and solidification conditions to investigate the impurity segregation separation performance from Si, especially for crucial P at several ppmw levels. Varying acid leaching parameters also employed optimized process window. Results indicate that novel alloying-leaching system is valid high extraction. The ternary intermetallic phase Ca7Mg7.5±δSi14 appears as main precipitate in all gather other minor impurities. Rapid...
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In response to the escalating global demand for solar photovoltaic (PV) energy, there is a critical need more cost-effective and environmentally sustainable production methods upgrading metallurgical-grade silicon (MG-Si). Among various metallurgical approaches, acid leaching an economical effective method upgrade MG-Si. However, impact of cooling rates during solidification, potentially significant factor optimization process, has been rarely investigated. this work, effects magnesium...
The alumina industry faces a significant challenge in effectively utilising bauxite residue due to its hazardous nature. A potential solution involves recovering iron and from the residue, leading substantial reduction volume also drawing some material value. This study involved production of self-hardened calcite pellets which were then subjected hydrogen subsequently leached with sodium carbonate for extraction. In an effort establish circular flow, leaching contains most calcium metallic...
Using hydrogen to produce iron is a promising way for the steel industry achieve goal of carbon neutrality. The reducibility iron-bearing oxides by significantly impacts productivity and energy consumption during reduction process. This study investigated competitive kinetics different bearing pellets including ore pellets, bauxite residue calcium-added sintered self-hardened at isothermal condition. Various characterization tools, such as X-ray diffraction, electron probe analysis,...
The sustainable production of high-purity silicon is one the greatest concerns in solar industry. SisAl process an alternative and innovative approach to produce based on aluminothermic reduction silica slags. In present work, a Si-Ca-Al alloy was produced through further purified acid leaching. main precipitates were determined as CaSi2 CaAl2Si2 with minor other metallic phases embedded inside. crushed milled for leaching experiments using hydrochloric under magnetic stirring. concentration...
Hydrogen reduction iron making is considered as the most promising technology for steel industry to achieve goal of carbon neutrality. The reducibility iron-bearing oxides by hydrogen significantly impacts productivity and energy consumption during process. In this work, comparative kinetics investigation on different pellets, including ore bauxite residue calcium-added sintered self-hardened were studied under various temperatures isothermally. Various charactrization techniques utilized...