LLC “UMMC-Holding”, Verkhnyaya Pyshma, Russia.

A. M. Panshin, Technical Director

Institute of Material Science and Metallurgy, Ural Federal University, Ekaterinburg, Russia:
M. G. Viduetskiy, Counselor of Director

JSC “Chelyabinsk Zinc Plant”, Chelyabinsk, Russia
P. A. Kozlov, Head of Engineering Center
D. A. Ivakin, Head of Technological Bureau of Engineering Center, e-mail: dai@zinc.ru

Chelyabinsk Zinc Plant carried out the pilot tests of technology of flotation removement of sulfur from zinc cake on pilot pneumatic flotation machine CFM-180. A key principle of operation of pneumatic machines CFM is pulp oxygenation with finely dispersed air bubbles in ejector, which reduces flotation time and increases its selectivity. Technological scheme of testing includes basic flotation of original cake, control flotation of chamber product, and two cleaner flotations of froth product. In comparison with mechanical flotation machine, the following indicators increase during flotation of zinc 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. Results of laboratory studies of flotation products' processing are presented. Flotation and zinc cake washing can reduce zinc cake output by 20–25%, which allows to increase the processing volumes of oxidized imported raw materials by Waelz-process. Processing of chamber flotation product (zinc cake with low sulfur content) by Waelz-process can improve the Waelz kiln performance and reduce the coke breeze consumption. Foam product can be used as a sulfidizing additive under independent processing of copper plant dust with zinc, lead and tin extraction into fumes. On the basis of the carried out tests, there was realized the project of processing site of zinc cakes by flotation on the basis of industrial machines CFM-600 and CFM-1400.

1. Kozlov P. A., Kazanbaev L. A., Ivakin D. A. et al. Prognosticheskiy raschet vykhoda tsinkovykh, mednykh i kobaltovykh kekov (Forecast calculation of yield of zinc, copper and cobalt cakes). Izvestiya vuzov. Tsvetnaya metallurgiya = Russian Journal of Non-Ferrous Metals. 2006. No. 4. pp. 6–13.
2. Kozlov P. A. Velts-protsess (Waelz-process). Moscow : “Ore and Metals” Publishing House, 2002.
3. Panshin A. M., Kozlov P. A. Ivakin D. A. Issledovanie teplotekhnicheskikh osobennostey raboty trubchatykh pechey pri veltsevanii otkhodov metallurgii (Research of thermaltechnical peculiarities of operation of pipe furnaces with Waeltz-processing of metallurgy wastes). Tsvetnye Metally = Non-ferrous metals. 2013. No. 8. pp. 48–50.
4. Geykhman V. V., Kazanbaev L. A., Kozlov P. A. et al. Effektivnost primeneniya flotatsii pri pererabotke tsinkovykh kekov (Efficiency of application of flotation during processing of zinc cakes). Tsvetnye Metally = Non-ferrous metals. 2000. No. 5. pp. 32–34.
5. Geykhman V. V., Kazanbaev L. A., Kozlov P. A. et al. Promyshlennye ispytaniya flotatsii tsinkovykh kekov (Industrial testings of flotation of zinc cakes). Tsvetnye Metally = Nonferrous metals. 2003. No. 1. pp. 29–32.
6. Garifulin I. F., Viduetskiy M. G., Maltsev V. A., Panshin A. M., Purgin A. P. Postroenie matematicheskoy modeli flotatsii tsinkovykh kekov v apparatakh serii KFM (Designing of mathematical model of flotation of zinc cakes in CFM apparatuses). Tsvetnye Metally = Non-ferrous metals. 2013. No. 8. pp. 24–27.
7. Panshin A. M., Maltsev V. A., Viduetskiy M. G., Purgin A. P., Garifulin I. F. Opytno-promyshlennye ispytaniya tekhnologii flotatsii tsinkovogo keka s ispolzovaniem pnevmaticheskoy flotomashiny serii KFM (Experimental-industrial testings of technology of zinc cake flotation using pneumatic columnar flotation machine). Tsvetnye Metally = Non-ferrous metals. 2013. No. 8. pp. 20–23.
8. Panshin A. M., Leontev L. I., Kozlov P. A., Dyubanov V. G., Zatonskiy A. V., Ivakin D. A. Tekhnologiya pererabotki pyli elektrodugovykh pechey Otkrytogo Aktsionernogo Obshchestva “Severstal” v velts-komplekse Otkrytogo Aktsionernogo Obshchestva “Chelyabinskiy Tsinkovyy Zavod” (Technology of processing of JSC “Severstal” electric-arc furnaces' dust in Waelz-complex of JSC “Chelyabinsk Zinc Plant”). Ekologiya i promyshlennost Rossii = Ecology and industry of Russia. 2012. No. 11.
9. Panshin A. M., Kozlov P. A., Ivakin D. A. et al. Termodinamicheskiy i kineticheskiy analiz otgonki tsinka, svintsa i olova v velts-pechi pri pererabotke pylevidnykh polimetallicheskikh promproduktov mednoy promyshlennosti (Thermodynamic and kinetic analysis of distillation of zinc, lead and tin in Waelz-klin during processing of powder-like polymetallic middlings of copper industry). Tsvetnye Metally = Non-ferrous metals. 2013. No. 8. pp. 41–44.
10. Kozlov P. A., Kazanbaev L. A., Boldyrev V. V. et al. Regulirovanie sulfatnogo balansa na Chelyabinskom Tsinkovom Zavode (Regulation of sulfate balance at Chelyabinsk Zinc Plant). Tsvetnye Metally = Non-ferrous metals. 2005. No. 5/6. pp. 31–34.