2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 8: Non-ferrous, Rotary Kiln, Ferro-alloys, Rare Earth, Coal
| Editors: | Kongoli F, Xueyi G, Shumskiy V, Kozlov P, Capiglia C, Silva AC, Turna T |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 350 pages |
| ISBN: | 978-1-987820-50-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Research And Development Of Hydrometallurgical Processing Stage In Copper Industry Wastes’ Recycling Technology With Tin Recovery Into Tin Concentrate
Pavel Kozlov1; Yuriy Reshetnikov2;1CHELYABINSK ZINC PLANT, Chelyabinsk, Russian Federation; 2PJSC CHELYABINSK ZINC PLANT, Chelyabinsk, Russian Federation;
Type of Paper: Plenary
Id Paper: 217
Topic: 6
Abstract:
Chelyabinsk Zinc Plant developed the technology of processing of zinc-, lead- and tin-containing copper industry dusts, including the following stages:<br />-pyrometallurgical stage – calcinations with an addition of sulphidizer, flux and reducing agent to the product, where lead is removed from the product with a transfer in processed sublimates, while zinc and tin stay in cinder;<br />- hydrometallurgical stage – high-temperature leaching of cinder, where zinc, iron, copper etc. are extracted in solution with obtaining of tin-concentrating solid residue. <br />There is considered the hydrometallurgical stage of obtaining of tin-containing concentrate from cinder with low content of lead (less than 1%). <br />There is shown the low extraction of zinc in solution and absence of selective separation of tin and lead with acid sulfuric-acid dust leaching without application of pyrometallurgical stage. <br />Three-stage leaching (similar to the technology of hydrometallurgical processing of Waelz-oxides, existing in Chelyabinsk Zinc Plant) and one-stage high-temperature leaching were researched for obtained cinder. Three-stage product leaching is low-efficient, because it requires a lot of equipment and does not provide the required concentration of tin in solid residue. <br />About 98% of zinc, contained in cinder, more than 95% or copper and iron is transferred in solution during the high-temperature product leaching by waste zinc electrolyte with addition of sulfuric acid (t= 80-900C, the concentration of H2SO4 is 160-170g/dm3). Obtained solution is required for application in a technological cycle of the zinc plant. The solid residue contains 14-21% of tin, which allows to use it at tin enterprises. <br />Keywords: copper industry dusts, cinder, pulp, hydrometallurgical processing, selective leaching, zinc, tin, lead.
References:
[1] P. Kozlov, Mastering of recycling of anthropogenic wastes of non-ferrous metallurgy, Non-ferrous Metals, 2 (2014), 45-52.[2] A.M. Panshin, R.M. Shakirzyanov, A.V. Zatonskiy, P.A. Kozlov., D.A. Ivakin, Proceedings of Fundamental researches and applied developments of processes of utilization and processing of anthropogenic formations, Yekaterinburg, 2014, Processing of dusts of bag collectors, formed during production of secondary copper, containing zinc, lead and tin, 522.
[3] M.E. Syroeshkin, Sh.I. Yumakaev, Processing of Waelz-oxides, slag sublimates and lead dusts on lead-zinc plants, Moscow, Metallurgiya, 1971, 88
[4] A.M. Panshin, D.A. Ivakin, V.N. Vyatkin, Thermodynamic and kinetic analysis of distillation of zinc, lead and tin in Waelz-kiln during processing of powder-like polymetallic middings of copper industry, Non-ferrous metals, 8 (2013), 41-44.
[5] L.A. Kazanbaev, P.A. Kozlov, V.L. Kubasov, A.V. Kolesnikov, Hydrometallurgy of zinc (purification of solutions and electrolysis), 2006, Moscow, Russia, 176.