| [Solid and liquid wastes from industrial processes: Innovations in material recovery and environmental protection] Non-ferrous and Ferrous Dust Processing by Waelz Process Non-ferrous and Ferrous Dust Processing by Waelz Process Pavel Kozlov1; Leontyev Leopold Igoryevich2; Dyubanov Valeriy Grigorievich3; 1UMMC-HOLDING, Moscow, Russian Federation; 2RUSSIAN ACADEMY OF SCIENCES, Moscow, Russian Federation; 3BAYKOV METALLURGY & MATERIALS INSTITUTE, Moscow, Russian Federation; PAPER: 134/Recycling/Regular (Oral) SCHEDULED: 11:20/Sat. 26 Oct. 2019/Adonis ABSTRACT: Gas cleaning dusts, forming in ferrous and non-ferrous metallurgy, have a high content of zinc, lead, copper and other components. These metals may be extracted from steel electrosmelting dust and copper smelting dust for matte into the intermediate products for their production. In the Russian Federation (RF), steel electrosmelting dusts, containing 30% or more of zinc [1], began to be recycled only in recent years [2]. Millions of such dusts disposal tonnes have been accumulated. Copper smelting dust for matte contains 10-25% of zinc and 10-30% of lead that makes it perspective for non-ferrous metals recovery [3]. The technological flowsheets of metallurgical dusts processing of steel and copper production are given in this work at the conditions of Chelyabinsk Zinc Plant, PJSC. The main flowsheet with intermediate products obtaining for zinc, lead and iron production, as well as an auxiliary flowsheet with zinc powder and lead fumes production are presented for steel electrosmelting dust. Both flowsheets are presented for coper smelting dust: a functional flowsheet with two pyrometallurgical stages with intermediate products obtaining for zinc, lead, tin and copper production and a developed flowsheet with one pyrometallurgical stage. The valuable components extraction from wastes of steel and copper production contributes to increase the economic and ecological efficiency of production in the nonferrous-metals industry by means of raw materials economy and implication in recycling of resulting and non-utilizable wastes. References: [1] Yakornov S.A., Panshin A.M., Kozlov P.A., Ivakin D.A. Current state of electrical arc furnace dusts processing in Russia and abroad // Tsvetnye Metally. - 2017. - No. 4.-P. 23-29. [2] Stefanova A., Aromaa J. Stefanova A., Aromaa J. Alkaline leaching of iron and steelmaking dust. Helsinki: Aalto University, School of Chemical Technology, 2012. 72 p. [3] Grudinsky P. I., Kozlov P.A., Dyubanov V.G. Copper smelter dust as promising material for recovery of non-ferrous metals by the Waelz process // Perspektivnye materialy. 2018. No 12. P. 74-81. (In Russian) |
