The desulfurization of lead paste by regenerated alkali was as follows: (i) desulfurization was conducted by adding waste lead paste to a beaker containing a certain volume of regenerated NaOH solution and stirred. (ii) After the desulfurization reaction was complete, filter residue and filtrate were obtained by vacuum filtration.
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
NaOH was used as the direct desulfurizer for lead paste, and lime was used to regenerate NaOH from the mother liquid at sufficient concentrations for desulfurization.
Thus, the proposed pre-desulfurization process for lead paste using the Na-Ca double alkali method is economically feasible in industrial applications. A pilot-scale experiment would be necessary to predict the economic benefit more precisely for future large-scale industrial application.
Adopt the surface update strengthens the alkali-making reaction. The traditional sodium desulfurization process for waste lead-acid batteries is beneficial to the environment; however, it is limited by poor economic viability as the cost of desulfurizer is much higher than the value of desulfurization by-products.
In summary, the Na-Ca double alkali pre-desulfurization process can successfully recover lead from spent lead paste in an environmentally sustainable manner, minimize the disposal of hazardous solid waste, and prevent the emission of harmful gases. 5. Conclusion
Efficient Desulfurizer Recycling during Spent Lead–Acid Batteries …
1 Introduction. With the rapid development of the automobile industry, the production of lead–acid batteries (LABs) as the automotive ignition power source and energy storage devices has experienced enormous growth during the past few decades. [] Up to 11.7 million tons of refined lead (Pb) were used in the manufacture of LABs, accounting for over …
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Efficient Desulfurizer Recycling during Spent Lead–Acid Batteries …
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If you are experiencing problems with your lead-acid battery, desulfation may be the solution. Desulfation is the process of removing sulfate deposits from the lead plates of a battery. Using a Battery Desulfator. A battery desulfator is a device that uses high-frequency pulses to break down sulfate deposits on the lead plates of a battery. This tool can help …
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Efficient Desulfurizer Recycling during Spent Lead–Acid Batteries …
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The treatment of spent lead paste is essential for the recycling of spent lead-acid batteries. In this study, we propose a facile route for the recovery of lead from spent lead paste by pre-desulfurization followed by low-temperature reduction smelting. The effects of two desulfurization methods, i.e., high-pressure and normal-pressure processes, on the …
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Efficient Desulfurizer Recycling during Spent Lead–Acid Batteries …
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 …
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The traditional sodium desulfurization process for waste lead-acid batteries is beneficial to the environment; however, it is limited by poor economic viability as the cost of …
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The new processes of desulfation of PbSO 4 and sulfation of Ca(OH) 2 can be instantly completed in 10 and 30 s, respectively, which significantly enhance reaction speeds, conversion efficiencies, and space-time yield, achieving a directional, continuous, and sustainable technology, guiding a clean revolutionary improvement on the treatment of ...
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Su Yu, Lin Chuansong, Yang Aihe. Talking about the pollution prevention technology and policy of waste lead-acid batteries [J]. Light Industry Science and Technology, 2019, 35(08): 118-119 ...
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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 ...
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Download Citation | Recovery of lead from lead paste in spent lead acid battery by hydrometallurgical desulfurization and vacuum thermal reduction | Lead sulfate, lead oxides and lead metal are ...
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This study proposes a new closed-loop pre-desulfurization process for lead paste, which consumes only lime as the indirect desulfurizer, produces sodium sulfate as a by-product, and regenerates...
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Analysis of a more sustainable method for recycling waste lead ...
The traditional sodium desulfurization process for waste lead-acid batteries is beneficial to the environment; however, it is limited by poor economic viability as the cost of desulfurizer is much higher than the value of desulfurization by-products. This study proposes a new closed-loop pre-desulfurization process for lead paste, which ...
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Ultra‐Fast Recyclable and Value‐Added Desulfation …
The new processes of desulfation of PbSO 4 and sulfation of Ca(OH) 2 can be instantly completed in 10 and 30 s, respectively, which significantly enhance reaction speeds, conversion efficiencies, and space-time …
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STC has produced an experimental batch of about 1000 starter batteries with the proposed hydro-metallurgical Lead Oxide Regeneration technology and several tests carried out by independent electrochemical laboratories confirmed that the obtained batteries containing the regenerated nanostructured oxides have a greater capacity and a longer life ...
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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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STC''s revolutionary and patented U4Lead technology is already working in an industrial plant supplied by STC to the Nigerian company named Green Recycling Industries. It allows the...
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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 ...
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In this paper, a novel approach to recover PbO from lead pastes of spent lead acid batteries by desulfurization and crystallization in sodium hydroxide (NaOH) solution after sulfation was proposed. In the lead pastes, PbO can react with sulfuric acid easily to generate PbSO 4, so that the contents of PbO have little impact on the sulfation.
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STC''s revolutionary and patented U4Lead technology is already working in an industrial plant supplied by STC to the Nigerian company named Green Recycling Industries. It allows the...
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STC has produced an experimental batch of about 1000 starter batteries with the proposed hydro-metallurgical Lead Oxide Regeneration technology and several tests carried out by independent electrochemical laboratories confirmed that …
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Desulfation in Lead-acid Batteries; a Novel (resistive) Approach: A major life-limiting problem with lead-acid batteries is that when discharged (partially or otherwise) the resulting lead-sulfate slowly transforms into an insoluble form …
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