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

Abstract

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% PbSO 4 ) and lanarkite (about 36% Pb 2 SO 5 ). 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.

Material and Substance Flow Analysis of Used Lead Acid Batteries in Nigeria: Implications for Recovery and Environmental Quality

“…The elemental (Pb) compositions and concentrations of ULAB pastes observed in this study are similar to the concentration range of 70-73% reported by Buzatu et al 21 The levels observed for metals other than Pb in this study were below the TTLC values. It should be noted that the LAB samples in the present study were randomly collected and not separated based on vehicle source (cars, buses or trucks) or manufacturer.…”

Recycling of Rechargeable Batteries: Insights from a Bibliometrics‐Based Analysis of Emerging Publishing and Research Trends

“…The recycling technology of lead-acid batteries was mainly studied by hydrometallurgy (21) and pyrometallurgy (15). Because most of the lead in lead-acid batteries can be recycled efficiently and simply by hydrodesulfurization and pyrometallurgy, [66] the Ni-MH batteries can efficiently recover nickel and rare earth elements from the electrode by the hydrometallurgy process, so the research on its recovery technology was mainly based on hydrometallurgy (32 papers). Hydrometallurgy (19) and electrochemical methods (9) were preferred to study the recovery technology of Ni-Cd batteries, because nickel and cadmium ions can be recovered by electrochemical deposition in addition to hydrometallurgical leaching.…”

Lead recovery from spent lead acid battery paste by hydrometallurgical conversion and thermal degradation

“…The disadvantages of high energy consumption and secondary contamination resulting from the pyrometallurgical method have not yet been alleviated in industrialisation (Gomes et al, 2011). As a result, the hydrometallurgical recovery processes have been proposed as an effective alternative they have a lower environmental impact (Buzatu et al, 2015; Sun et al, 2015).…”