| 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: 144/Recycling/Regular (Oral) SCHEDULED: 16:20/Sat. 26 Oct. 2019/Ambrosia A (77/RF) 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. |
