ORALS
SESSION:
RecyclingTuePM1-R7
| 9th Intl. Symp. on Sustainable Materials Recycling Processes & Products |
| Tue. 28 Nov. 2023 / Room: Sunflower | |
| Session Chairs: Florian Kongoli; Juergen Antrekowitsch; Session Monitor: TBA |
14:55: [RecyclingTuePM107] OS
PLANT AND MINERAL WASTE-BASED NEW MATERIALS FOR USE IN HYDRO- AND PYROMETALLURGICAL PROCESSES Svetlana Yefremova1 ; Askhat Kablanbekov
2 ; Baimakhan Satbaev
3 ; Feruza Berdikulova
4 ; Nurgali Shalabaev
5 ; Sergey Yermishin
4 ;
Serik Satbaev6 ; Alma Terlikbayeva
4 ; Abdurassul Zharmenov
4 ;
1National Center on Complex Processing of Mineral Raw Materials, Almaty, Kazakhstan;
2Kazakh-British Technical University, Almaty, Kazakhstan;
3Astana Branch of National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan RSE, Astana, Kazakhstan;
4National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan RSE, Almaty, Kazakhstan;
5Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan;
6National Center on Complex Processing of Mineral Raw Materials, Astana, Kazakhstan;
Paper Id: 209
[Abstract] The Concept of Industrial and Innovative Development of the Republic of Kazakhstan for 2021-2025 includes the development of production of rare and rare earth metals among the priority areas. The latter, unfortunately, is associated with the emissions of organic compounds into the environment. To avoid this, it is necessary to purify solutions of rare-metal production from organic pollutants.
Sorption with carbon sorbents of a novel type is considered to be the most effective way of removing organic impurities during the hydrometallurgy process of non-ferrous metals [1]. However, there are no data on the behavior of these sorbents in the hydrometallurgy of rare metals. Carbon sorbents active against the ions of rare, precious and heavy metals have been obtained from the waste of rice and coke production such as rice husk and special fine coke. It is known that activated carbons from rice husk are effective to remove organic pollutants [2-4]. But their production is associated with the formation of secondary waste.
The purpose of the current work is to use rice husk and special fine coke to generate a new selective composite sorbent and resource-saving high-temperature material for use in hydro- and pyrometallurgical sectors of industry.
Carbon and silica-containing components are isolated from the both waste. The carbon components are used to produce a composite sorbent. The silica-containing components are used to produce a high-temperature material. The combination of a finely dispersed rice husk carbon material with a large specific surface area and a more durable, meso- and macroporous special coke carbon material contributes to the formation of a carbon-carbon matrix when obtaining a composite sorbent. The combination of stoichiometric amounts of amorphous silicon dioxide isolated from rice husk, special fine coke ash and original rice husk is used to ensure the formation of highly refractory silicon carbide. The burning of rice husk contributes to the forming of a porous structure of the prepared material. The formation, on the one hand, of highly refractory phases and, on the other hand, of a porous system enhances the strength, durability and thermal insulation properties of the resulting refractory material.
So, rice husk and special fine coke (some of the most common waste types) are promising raw materials for creating a selective composite sorbent of a novel type. In order to ensure the complex processing of special fine coke and rice husk, it seems practical to use silica-containing waste from composite sorbent production mixed with raw rice husk to synthesize a resource-saving high-temperature material.
This research is funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (grant number AP 19677767).
References:
[1] Yu.V. Surovikin, V.A. Likholobov, V.V. Sergeev, I.V. Makarov, Solid Fuel Chemitry 6 (2014) 47-56.
[2] Y. Deng, X. Wang, Y. Li, J. Shao, H. Yang, H. Chen, Sheng Wu Gong Cheng Xue Bao (Chinese Journal of biotechnology) 10 (2015) 1492-500.
[3] M. Akhtar, M.I. Bhanger, S. Iqbal, S.M. Hasany, Journal of Hazardous Materials 1 (2006) 44-52.
[4] S.L. Ng, C.E. Seng, P.E. Lim, Chemosphere 10 (2009) 1392-400.
