13 documents found, page 1 of 2
Hydrometallurgical recycling of lithium-ion batteries by reductive leaching wit...
Vieceli, N.; Nogueira, Carlos; Guimarães, C.; Pereira, Manuel F. C.; Durão, F.; Margarido, F.ABSTRACT: The hydrometallurgical extraction of metals from spent lithium-ion batteries (LIBs) was investigated. LIBs were first dismantled and a fraction rich in the active material was obtained by physical separation, containing 95% of the initial electrode, 2% of the initial steel and 22% of plastic materials. Several reducers were tested to improve metals dissolution in the leaching step using sulphuric acid...
Recovery of lithium carbonate by acid digestion and hydrometallurgical processi...
Vieceli, N.; Nogueira, Carlos; Pereira, Manuel F. C.; Durão, F.; Guimarães, C.; Margarido, F.ABSTRACT: Lithium extraction from hard-rock ores has regained importance due to the increased demand for this metal to supply the growing battery market. Therefore, several studies have been focused on the lithium extraction from ores, however, leaching and purification steps are sparsely studied. Thus, the objective of this study was to evaluate the main factors affecting the water leaching step and the subseq...
Optimization of an innovative approach involving mechanical activation and acid...
Vieceli, N.; Nogueira, Carlos; Pereira, Manuel F. C.; Durão, F.; Guimarães, C.; Margarido, F.ABSTRACT: The recovery of lithium from hard rock minerals has received increased attention given the high demand for this element. Therefore, this study optimized an innovative process, which does not require a high-temperature calcination step, for lithium extraction from lepidolite. Mechanical activation and acid digestion were suggested as crucial process parameters, and experimental design and response-surf...
Hydrometallurgical recycling of lithium-ion batteries by reductive leaching wit...
Vieceli, N.; Nogueira, Carlos; Guimarães, C.; Pereira, Manuel F. C.; Durão, F.; Margarido, F.ABSTRACT: The hydrometallurgical extraction of metals from spent lithium-ion batteries (LIBs) was investigated. LIBs were first dismantled and a fraction rich in the active material was obtained by physical separation, containing 95% of the initial electrode, 2% of the initial steel and 22% of plastic materials. Several reducers were tested to improve metals dissolution in the leaching step using sulphuric acid...
Optimization of metals extraction from spent lithium-ion batteries by sulphuric...
Vieceli, N.; Nogueira, Carlos; Pereira, Manuel F. C.; Durão, F.; Guimarães, C.; Margarido, F.ABSTRACT: The main factors that affect the extraction of metals from spent lithium-ion batteries by acid leaching using H2SO4, and sodium metabisulphite, were evaluated and optimized through a set of experiments, framed by a techno-economic approach. The maximum value of the profit response was obtained with the highest possible values of acid concentration (2.5 M) and time (2 h), a liquid/solid ratio of 5 L/kg...
The role of automated sorting in the recovery of aluminium alloys waste
Nogueira, Carlos; Trancoso, Maria Ascensão; Pedrosa, Fátima; Crujeira, Teresa; Oliveira, Paula; Gonçalves, Ana Maria; Margarido, F.; Santos, R. NovaisA large number of aluminium alloys with varying alloying elements are present in vehicle structures and components, as well as in other household equipment. The recycling of these alloys is nowadays processed to low quality metal products due to high level of contamination, hindering the upgrading of recycling rates. The development and application of automated sorting technologies capable to detect, select and...
ELV recycling steps up a gear: development of improved sorting technologies for...
Nogueira, Carlos; Pedrosa, Fátima; Margarido, F.; Santos, R. Novais; Durão, F.; Guimarães, C.Although the number of end of life vehicles (ELVs) needing recycling is growing, due to processing limitations aluminium recycling rates are being hindered. A European-funded project - ShredderSort - aims to contribute to new solutions to the aluminium recycling industry. More than 10 million tons of automotive waste from end of life vehicles (ELV) are generated yearly in the EU and the values are continuously ...
Collection of waste batteries in Portugal and Brazil
Vieceli, N.; Margarido, F.; Durão, F.; Guimarães, C.; Nogueira, CarlosThe legal aspects governing the disposal of used batteries were established in the nineties of the last century in Brazil and Portugal. In Brazil the law establishes the implementation of a reverse logistics system of this waste, similar to the system of Portugal, in which there is an extended producer responsibility. Portugal, subjected to the targets set by the European Union, has increased collection rates, ...
Separation of non-ferrous frations of shredded end-of-life vehicles for valoris...
Margarido, F.; Santos, R. Novais; Durão, F.; Guimarães, C.; Nogueira, Carlos; Oliveira, Paula; Pedrosa, Fátima; Gonçalves, Ana MariaWorldwide the end-of-life vehicles (ELV) generate millions of tons of waste, requiring an adequate and efficient management. The non-ferrous fraction contains essentially aluminium, magnesium and copper alloys, being valorised by metallurgical processors to obtain new metals and alloys. However most of the recovered metals are downcycled, as is the case of aluminium where the recycled products are essentially u...
Minero-metallurgical processes for lithium recovery from pegmatitic ores = Proc...
Margarido, F.; Vieceli, N.; Durão, F.; Guimarães, C.; Nogueira, CarlosABSTRACT: With the expected increase of lithium demand in the forthcoming years, an efficient management of all the available resources is necessary. Rock minerals like pegmatites are important primary sources of lithium that shall be valorized. Minero-metallurgical processes have been developed for lithium recovery from pegmatitic ore deposits, involving physical concentration, thermal treatment, digestion and...