E3S Web Conf.
Volume 18, 2017Mineral Engineering Conference MEC2017
|Number of page(s)||6|
|Published online||04 October 2017|
Silver recovery from zinc metallurgical sludge – analysis of solutions
1 AGH University of Science and Technology, Faculty of Non-Ferrous Metals Kraków, Poland
2 AGH University of Science and Technology, Faculty of Mining and Geoengineering Kraków, Poland
3 Górniczo-Hutnicze “Bolesław” S.A, Kolejowa 37, 32-332 Bukowno, Poland
* e-mail: email@example.com
During the hydrometallurgical process of zinc production, conducted in the ZGH “Bolesław” S.A. in Bukowno [Mine and Metallurgical Plant], about 40,000 tons of sludge is generated. After dehydration in the Larox filter presses, sludge contains ca. 16-18% of Zn, 20-25% of Fe, and 200-300 ppm of Ag. Next, sludge is transported to the Olkusz concentrator for flotation to obtain concentrate enriched with Ag (1,000-1,500 ppm). The concentrate is then sent to the HC “Miasteczko Śląskie” [zinc smelter], while the flotation tailings are subjected to recycling in waelz kiln in Bukowno to regain mainly Zn and Pb, in the form of oxides (also sent later to the HC “Miasteczko Śląskie”).
© The Authors, published by EDP Sciences, 2017
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