Processing oxidic waste of lead-acid batteries in order to recover lead

The main process parameters have been investigated with a relatively new method for lead recovery from oxidic paste. The method consisting in leaching with NaOH and is also useful for processing other secondary resources (volatile dusts resulted from metallurgical extraction of lead from primary res...

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Veröffentlicht in:Asia-Pacific journal of chemical engineering 2015-01, Vol.10 (1), p.125-132
Hauptverfasser: Buzatu, Traian, Petrescu, Mircea Ionut, Ghica, Valeriu Gabriel, Buzatu, Mihai, Iacob, Gheorghe
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container_title Asia-Pacific journal of chemical engineering
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creator Buzatu, Traian
Petrescu, Mircea Ionut
Ghica, Valeriu Gabriel
Buzatu, Mihai
Iacob, Gheorghe
description The main process parameters have been investigated with a relatively new method for lead recovery from oxidic paste. The method consisting in leaching with NaOH and is also useful for processing other secondary resources (volatile dusts resulted from metallurgical extraction of lead from primary resources). The chemical analysis and X‐ray diffraction have attested that the oxidic paste resulted from the dismantling of spent lead‐acid batteries has a content of 70–73% Pb, mainly as anglesite (around 38% PbSO4) and lanarkite (about 36% Pb2SO5). Experiments have been carried out through leaching with NaOH of the industrial paste out of spent car batteries as well as for the pure substances. The experiments were conducted at temperatures of 40, 60 and 80 °C, at various solid/liquid ratios (S : L = 1 : 10; 1 : 30 and 1 : 50) and different molarities for the NaOH solutions (2, 4, 6 and 8 M). The reaction time was 1 h for the leaching of the pure substances and 2 h for the leaching of the industrial pastes. An extraction efficiency of 92% Pb was obtained with a leaching solution of 6 M NaOH, at 60 °C, for 2 h and S/L ratios of 1 : 20–1 : 30. The efficiency may be increased up to 97% Pb only when the leaching process is carried out in two steps. © 2014 Curtin University of Technology and John Wiley & Sons, Ltd.
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An extraction efficiency of 92% Pb was obtained with a leaching solution of 6 M NaOH, at 60 °C, for 2 h and S/L ratios of 1 : 20–1 : 30. 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J. Chem. Eng</addtitle><description>The main process parameters have been investigated with a relatively new method for lead recovery from oxidic paste. The method consisting in leaching with NaOH and is also useful for processing other secondary resources (volatile dusts resulted from metallurgical extraction of lead from primary resources). The chemical analysis and X‐ray diffraction have attested that the oxidic paste resulted from the dismantling of spent lead‐acid batteries has a content of 70–73% Pb, mainly as anglesite (around 38% PbSO4) and lanarkite (about 36% Pb2SO5). Experiments have been carried out through leaching with NaOH of the industrial paste out of spent car batteries as well as for the pure substances. The experiments were conducted at temperatures of 40, 60 and 80 °C, at various solid/liquid ratios (S : L = 1 : 10; 1 : 30 and 1 : 50) and different molarities for the NaOH solutions (2, 4, 6 and 8 M). 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subjects aqueous solutions
Concentration (composition)
Diffraction
dissolution
Extraction
Leaching
Lead (metal)
Lead acid batteries
Pastes
Process parameters
Reaction time
recycling
waste
title Processing oxidic waste of lead-acid batteries in order to recover lead
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