Lead paste was firstly desulfurized with sodium carbonate, in the meanwhile lead sulfate was converted into lead carbonate and the form of lead metal and lead oxides remained unchanged, and then the desulfurized lead paste was reduced by charcoal under vacuum.
There are four main components in spent lead acid battery: polymeric containers, lead alloy grids, waste acids and pastes. Among them, the pastes mainly comprise lead oxide (∼9%), lead dioxide (∼28%), lead sulfate (∼60%) and a small amount of lead (∼3%) (Zhu et al., 2012a).
Conclusions A research investigation for recycling lead from lead paste in the spent lead acid battery under vacuum has been developed in this work.
Thus, desulfurization of lead sulfate into other lead compounds which can easily react with acid is a common pretreatment process for the spent lead paste . Carbonate and alkali are the most commonly used reagents for desulfurization of the spent lead paste.
Lead–acid batteries are important to modern society because of their wide usage and low cost. The primary source for production of new lead–acid batteries is from recycling spent lead–acid batteries. In spent lead–acid batteries, lead is primarily present as lead pastes.
Hence, based on the minimum specific gravity of industrial lead paste slurry, the concentration of desulfurizer required for sodium-calcium double alkali lead paste desulfurization was estimated to be at least 2.32 mol/L. 3.2. Mechanism of a novel process of lead paste pre-desulfurization
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Recovery of lead from lead paste in spent lead acid battery by ...
Semantic Scholar extracted view of "Recovery of lead from lead paste in spent lead acid battery by hydrometallurgical desulfurization and vacuum thermal reduction." by Yunjian Ma et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar''s Logo. Search 222,353,153 papers from all fields of science. Search. Sign In Create Free Account. DOI: …
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Storage Batteries Comprehensive Testing Regeneration System is the large-scale professional battery reconditioning equipment that is suitable for testing and reconditioning the lead-acid batteries. It is integrated with charge and discharge testing, pulse desulfurization, high-frequency activation, constant current overcharge repair, capacity grading, so on.
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Recovery of lead from lead paste in spent lead acid battery by ...
This paper reports a recovery of lead contained in spent lead acid battery using hydrometallurgical desulfurization and vacuum thermal reduction. The spent lead pastes are converting sulfur (PbSO 4 ) to soluble sulfates (Na 2 SO 4 …
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A novel approach to recover lead oxide from spent lead acid batteries by desulfurization and crystallization in sodium hydroxide solution after sulfation
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A compatible environmental process consisted of hydrometallurgical desulfurization and vacuum thermal reduction to recycle lead was investigated in this research. Lead paste was firstly desulfurized with sodium carbonate, by which, the content of sulfur declined from 7.87% to 0.26%. Then, the desulfurized lead paste was reduced by charcoal ...
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Recycling of spent lead-acid batteries (LABs) is extremely urgent in view of environmental protection and resources reuse. The current challenge is to reduce high consumption of chemical reagents. Herein, a closed-loop spent LABs paste (SLBP) recovery strategy is demonstrated through Na 2 MoO 4 consumption-regeneration-reuse.
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Lead sulfate, lead oxides and lead metal are the main component of lead paste in spent lead acid battery. When lead sulfate was desulfurized and transformed into lead carbonate by sodium carbonate, lead metal and lead oxides remained unchanged. Lead carbonate is easily decomposed to lead oxide and c …
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