Abstract
Secondary lead mainly refers to the lead recovered from discarded lead –acid battery , lead dust, and slag from lead smelting process. The pyrometallurgical process of spent lead involves direct smelting of lead or the desulphurization at lower temperatures followed by smelting . In electrowinning , lead was desulphurized by Na2CO3 and NaOH. The paste was leached, and lead compounds were dissolved in acid for electrowinning . Zinc can be recovered by leaching its compounds with ammonia, hydrochloric acid, and sulphuric acid. Various processes like solvent extraction and cementation can be employed to remove impurities. There are certain problems related to the production of zinc and lead : (i) Distribution of mineral dust particles in the area of grinding and screening. (ii) The presence of acid vapors in the areas of leaching , purification , and electrolysis causes the pollution of the water, soil, and loss of green space. (iii) Gas and diesel fuel release greenhouse gases.
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Afsara, S. (2020). A Review on Recycling Technologies and Product Life Cycle Issues of Zinc and Lead. In: Siegmund, A., Alam, S., Grogan, J., Kerney, U., Shibata, E. (eds) PbZn 2020: 9th International Symposium on Lead and Zinc Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-37070-1_85
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