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Development of the crystallization method for removing lead impurity from secondary zinc

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Abstract

The crystallization method for removing the lead impurity from secondary zinc, which is based on the liquation refining applied in zinc metallurgy and the monotectic transformation in the zinc-lead system, is considered. A laboratory setup allowing the acquisition of cylindrical samples 2 cm in diameter and up to 5 cm in height using planar crystallization from the top to the bottom is developed. Three series of experiments are performed, and a spectral analysis is fulfilled in several points over the height of the samples. Contaminated zinc with an average lead content of 0.26, 0.80, and 2.00% was used as the material for purification. It is established that, as a result of using this technology, lead is removed from the upper part of the sample and enriches its lower part.

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Authors and Affiliations

  1. National University of Science and Technology “MISIS”, Leninskii pr. 4, Moscow, 119049, Russia

    E. A. Shan’gin

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  1. E. A. Shan’gin
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Correspondence to E. A. Shan’gin.

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Original Russian Text © E.A. Shan’gin, 2012, published in Izvestiya VUZ. Tsvetnaya Metallurgiya, 2012, No. 4, pp. 43–47.

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Shan’gin, E.A. Development of the crystallization method for removing lead impurity from secondary zinc. Russ. J. Non-ferrous Metals 54, 51–55 (2013). https://doi.org/10.3103/S1067821213010197

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