ORALS

SESSION: RecyclingSatPM2-R1	Kozlov International Symposium on Sustainable Materials Recycling Processes and Products (7th Intl. Symp. on Sustainable Materials Recycling Processes and Products)
Sat Oct, 26 2019 / Room: Ambrosia A (77/RF)
Session Chairs: Shrenivas Ashrit; Elsayed Mousa; Session Monitor: TBA

16:20: [RecyclingSatPM210]
Using zinc cake flotation in columnar type equipment for increasing of Waelz Process Efficiency
A. Panshin¹ ; Pavel Kozlov² ; Mark Viduetskiy³ ; ¹LLC "UMMC-Holding", Verkhnyaya Pyshma, Russian Federation; ²UMMC-Holding, Moscow, Russian Federation; ³Institute of of Material Science and Metallurgy, Ural Federal University, Yekaterinburg, Russian Federation;
Paper Id: 144 [Abstract]

The Chelyabinsk Zinc Plant carried out the pilot tests of flotation technology removal of sulfur from zinc cake on pilot pneumatic flotation machine CFM-180. A key principle of the operation of pneumatic machines CFM is pulp oxygenation with finely dispersed air bubbles in the ejector, which reduces flotation time and increases its selectivity. Technological schemes of testing include basic flotation of original cake, control flotation of the chamber product, and two cleaner flotations of froth product. In comparison with mechanical flotation machine, the following indicators increase during flotation of cake on CFM: - Initial feed performance (by 4 times); - Sulfur recovery into flotation concentrate (by 1.4 times); - Silver recovery into flotation concentrate (by 1.2 times). The washed chamber product (0.06% of sulfide sulfur and 2.98% of sulphate sulfur) and foam product (18.1% of sulfide sulfur) were obtained during testing. The results of laboratory studies of the processing of the flotation products are presented. The flotation and zinc cake washing can reduce zinc cake output by 20-25%, which allows increase of the processing volumes of oxidized imported raw materials by the Waelz-process. Processing of chamber flotation product (zinc cake with low sulfur content) by the Waelz-process can improve the Waelz kiln performance and reduce the coke breeze consumption. Foam product can be used as a sulfurizing additive under independent processing of copper plant dust with zinc, lead, and tin extraction into fumes. On the basis of the carried out tests, the project of the processing site of zinc cakes by flotation on the basis of industrial machines CFM-600 and CFM -1400 has been realized.

References:
[1] Kozlov P.A., Kazanbaev L.A., Ivakin D.A. et al., Forecast calculation of yield of zinc, copper and cobalt cakes. Russian Journal of Non-Ferrous Metals. 2006.No.4.pp.6-13.
[2] Kozlov P.A., Waelz-process. Moscow: "Ore and Metals" Publishing House, 2002.
[3] Panshin A.M., Kozlov P.A., Ivakin D.A., Research of thermaltechnical peculiarities of operation of pipe furnaces with Waelz-processing of metallurgy wastes., Non-Ferrous Metals. 2013. No.8, pp. 48-50.

SESSION: RecyclingSatAM-R4	Kozlov International Symposium on Sustainable Materials Recycling Processes and Products (7th Intl. Symp. on Sustainable Materials Recycling Processes and Products)
Sat Oct, 26 2019 / Room: Adonis
Session Chairs: Florian Kongoli; Dominik Hofer; Session Monitor: TBA

11:20: [RecyclingSatAM01]
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 Id: 134 [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)