Results 31 to 40 of about 707,343 (311)

Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part)

Metals, 2023
The results obtained from the work on a concept of a recycling process for NdFeB magnets to recover rare earth elements for remanufacturing similar magnets are presented.
Hanwen Chung, Laras Prasakti, Srecko R. Stopic, Dominic Feldhaus, Vesna S. Cvetković, Bernd Friedrich   +5 more
doaj   +1 more source

Recycling BiCGSTAB with an Application to Parametric Model Order Reduction

, 2015
Krylov subspace recycling is a process for accelerating the convergence of sequences of linear systems. Based on this technique, the recycling BiCG algorithm has been developed recently.
Ahuja, Kapil, Benner, Peter, de Sturler, Eric, Feng, Lihong   +3 more
core   +1 more source

Computation-assisted analyzing and forecasting on impurities removal behavior during zone refining of antimony

Journal of Materials Research and Technology, 2020
High purity antimony (Sb) gains nowadays a rising interest for high-tech applications. Zone refining is commonly used as a reliable final purification step to achieve higher purity levels of Sb. However, the removal of arsenic (As) - the most troublesome
Xiaoxin Zhang, Semiramis Friedrich, Bin Liu, Tianxiang Huang, Bernd Friedrich   +4 more
doaj   +1 more source

Refining Principles and Technical Methodologies to Produce Ultra-Pure Magnesium for High-Tech Applications

Metals, 2019
During the last decade, magnesium-based medical implants have become the focal point of a large number of scientific studies due to their perceived favorable properties.
Seifeldin R. Mohamed, Semiramis Friedrich, Bernd Friedrich   +2 more
doaj   +1 more source

Recovery of cobalt from primary and secondary materials - an overiew / Извлечение кобальта из первичных и вторичных материалов - обзор / Izdvajanje kobalta iz primarnih i sekundarnih materijala - pregled [PDF]

Vojnotehnički Glasnik, 2020
Introduction/purpose: Cobalt is a strategic metal for industrial application. Cobalt recovery from oxidic ores such as laterite and sulphidic ores, and from secondary materials during acidic treatment and precipitation is a highly used strategy ...
Srećko R. Stopić, Bernd G. Friedrich
doaj   +1 more source

Deposition of silica in hydrometallurgical processes / Отложение кремния в гидрометаллургических процессах / Taloženje silicijum-dioksida u hidrometalurškim procesima [PDF]

Vojnotehnički Glasnik, 2020
Introduction/purpose: Dissolution of nonferrous metals from oxidic ores such as laterite, high silicon bauxite and eudialyte during acidic treatment was connected with silica gel formation.
Srećko R. Stopić, Bernd G. Friedrich
doaj   +1 more source

Effect of operating temperature on direct recycling aluminium chips (AA6061) in hot press forging process [PDF]

, 2013
A method of solid-state recycling aluminum alloy using hot press forging process was studied as well as the possibility of the recycled chip to be used as secondary resources.
Ahmad, Mohd Hafizi, Ayop, Osman, Faizol, Zulbirri, Jusoh, Muzammil, Majid, Huda A., Mat Saman, Norhafezaidi, Rahim, Mohamad Kamal A., Yusoff, Zubaida, Zubir, Farid   +8 more
core   +1 more source

Hydrogen Reduction of Tellurium Oxide in a Rotary Kiln, Initial Approaches for a Sustainable Process

Crystals
In the recycling of semiconductor materials like Bi2Te3 or CdTe, TeO2 may form as a by-product that can be directly reduced to recover metallic Te. The hydrogen reduction of TeO2 offers an eco-friendly alternative to conventional carbothermic reduction ...
Hanwen Chung, Semiramis Friedrich, Mengqi Qu, Bernd Friedrich   +3 more
doaj   +1 more source

Degradation Mechanism of Nickel-Cobalt-Aluminum (NCA) Cathode Material from Spent Lithium-Ion Batteries in Microwave-Assisted Pyrolysis

Metals, 2018
Recycling of Li-Ion Batteries (LIBs) is still a topic of scientific interest. Commonly, spent LIBs are pretreated by mechanical and/or thermal processing. Valuable elements are then recycled via pyrometallurgy and/or hydrometallurgy.
Fabian Diaz, Yufengnan Wang, Tamilselvan Moorthy, Bernd Friedrich   +3 more
doaj   +1 more source

A Combined Pyro- and Hydrometallurgical Approach to Recycle Pyrolyzed Lithium-Ion Battery Black Mass Part 1: Production of Lithium Concentrates in an Electric Arc Furnace

Metals, 2020
Due to the increasing demand for battery raw materials such as cobalt, nickel, manganese, and lithium, the extraction of these metals not only from primary, but also from secondary sources like spent lithium-ion batteries (LIBs) is becoming increasingly ...
Marcus Sommerfeld, Claudia Vonderstein, Christian Dertmann, Jakub Klimko, Dušan Oráč, Andrea Miškufová, Tomáš Havlík, Bernd Friedrich   +7 more
doaj   +1 more source