2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 4: Kozlov Intl. Symp. / Sustainable Materials Recycling Processes and Products
| Editors: | F. Kongoli, S.V. Alexandrovich, D.V. Grigorievich, L.L. Igoryevich, I. Startsev, T.A. Vladimirovich |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 193 pages |
| ISBN: | 978-1-989820-03-2 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Improvement of Processes of Indium Extraction from Zinc Production Sulphate Solutions Using Mixing-Setting Extraction Equipment
Oleg Belyakov1; A. Panshin2; Pavel Kozlov3;1CHELYABINSK ZINC PLANT, Chelyabinsk, Russian Federation; 2LLC "UMMC-HOLDING", Verkhnyaya Pyshma, Russian Federation; 3UMMC-HOLDING, Moscow, Russian Federation;
Type of Paper: Regular
Id Paper: 140
Topic: 7
Abstract:
The Institute of Chemistry and Chemical Technology (Siberian branch of the Russian Academy of Sciences) designed new "mixer-settler" type of extractor ESOT - 1.0 -15.0 (poly-propylene) and ESOT -0.8-5.5 (polyethylene with titan turbine type mixers). In 2013, these extractors were installed and tested in the indium extraction department of the hydrometallurgical shop of the Chelyabinsk Zinc Plant.
The modernized extraction unit is a cascade of three extractions (ESOT - 1.0 - 15.0) and six re-extractions (ESOT - 0.8 -5.5) which are sequentially connected blocks. Production capacity of the unit is 15m3/h of solution, counted as total volume of both phases.
Extractor ESOT - 1.0 - 15.0 is designed for indium extraction from sulphate-chloride acid solutions in raised temperatures (about 600°C) with a wide productive capacity range (max.15 m3/h of solution as total volume of phases). Extractor ESOT - 0.8 -5.5 is designed for the processes of indium re-extraction and extracting agent washing. Its production capacity does not exceed 5 m3/h of solution, counted as total volume of phases.
Application of the units ESOT - 1.0 - 15 and ESOT - 0.8 - 5.5 made it possible to carry out the following measurements:
- Efficient extraction in a wide range of the unit productive capacity (3-8 m3/h) of water phase with organic to water phases ratio of 1:3 (not counting recirculation of organic phase);
- Minimization of bilateral carry-over of water and organic phases (organic phase carry-over with raffinate was 0.2-0.5%, while water phase carry-over, saturated with extracting agent, was less than 0.3%);
- Minimization of indium loss with raffinate (to 6-7 mg/l with productivity 5 - 7.5 m3/h of water phase);
- Ensuring the reliable performance of the extraction unit with higher silica acid concentration in the initial solution (to 0.4 g/dm3);
- Consumption decrease on the unit production (cost decrease of basic materials by more than 10 times);
- Maintenance simplification and extraction unit repair.
Keywords:
Hydrometallurgical; Optimization; Technology; Zinc;References:
[1] Fedorov P.I., Akchurin R.Kh., Indium. Moscow: Science, 2000, 276 p.[2] Kazanbaev L.A., Ways of creation of wasteless manufacturing system at Chelyabinsk Electrolyte Zinc Plant. Non-ferrous Metals. 1985. No. 4. pp. 35-38.
[3] Kazanbaev L.A., Kozlov P.A., Kubasov V.L., Travkin V.F. Indium. Technology of Production. Moscow: "Ore and Metals" Publishing House, 2004. 168 p.