Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/696
Título: Physical processing efficiency of saline vs. alkaline spent batteries
Autor: Cabral, Marta
Nogueira, C. A.
Margarido, F.
Palavras-chave: Recycling
Spent batteries
Physical processing
Data: 12-Out-2008
Citação: Cabral, Marta; Nogueira, C. A.; Margarido, F. Physical processing efficiency of saline vs. alkaline spent batteries. REWAS 2008 – Global Symp. on Recycling, Waste Treatment and Clean Technology (Proc.), Cancun, Mexico, 2008, 12-15 Oct., B. Mishra, C. Ludwig and S. Das (Eds.), TMS, Warredale, USA, p. 1045-1050
Resumo: Physical processing of spent batteries which includes shredding and sieving operation is the first step for chemical treatment by hydrometallurgy. A laboratory study was carried out to evaluate physical processing efficiency, by analysing the resulting particle size, of alkaline and saline mignon-type Zn-MnO2 batteries. After shredding with a tip shredder, results obtained showed that alkaline batteries were more efficiently size reduced than saline batteries. Difference in particle size distribution was larger for granulometric fraction -20+11.2 mm and also higher for saline batteries. Average diameters (d50) for saline and alkaline batteries were respectively 9.1 and 6.2 mm. Chemical composition carried out on several granulometric fractions allowed to identify metals distribution through size categories. This analysis showed that zinc concentration with the grain size was almost constant, while manganese decreased when particle size increased. More than 95% of iron scarp from the battery cases had a particle size higher than 5.6 mm.
URI: http://hdl.handle.net/10400.9/696
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