ORALS

SESSION: IronWedPM3-R2	Assis International Symposium (9th Intl. Symp. on Advanced Sustainable Iron & Steel Making)
Wed. 29 Nov. 2023 / Room: Dreams 2
Session Chairs: Tateo Usui; Session Monitor: TBA

17:55: [IronWedPM313] OS
DEVELOPMENT OF RATIONAL RESOURCE-SAVING TECHNOLOGY FOR SMELTING FERROSILICOALUMINUM AND ORGANIZATION OF ITS PRODUCTION
Abdurassul Zharmenov¹ ; Jürgen Hein² ; Sailaubai Baisanov³ ; Alibek Baisanov³ ; Yerbolat Makhambetov³ ; ¹National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan RSE, Almaty, Kazakhstan; ²ICMD International Corporation of Metal and Alloy Development Holding AG, Ганновер, Germany; ³Chemical-metallurgical Institute named after Zh. Abishev, Karaganda, Kazakhstan;
Paper Id: 385 [Abstract]

The depletion of reserves of high-quality primary ore raw materials (quartzite, bauxite), the upward trend in the cost of coke, etc., presupposes an integrated approach to the use of mineral raw materials and coal mining products. Involving coal mining waste in the metallurgical process is one of the promising directions for organizing the production of complex silicon and silicon-aluminum alloys based on the electrothermal properties of high-ash carbonaceous rocks. The content of basic oxides in the ash of carbonaceous rocks, as well as the price, allows us to consider it as a cheap source of the corresponding elements in the composition of complex ferroalloys. The purpose of this work is to develop a rational resource-saving technology for the smelting of ferrosilicoaluminum using carbonaceous rocks. The technology for smelting ferrosilicoaluminum involves the use of high-ash coal waste with minor additions of quartzite without the use of coke. The process of reduction of silicon and aluminum is provided by carbonaceous rock. Waste carbonaceous rocks with an ash content of 
50-65% are a unique material and are a natural mixture of oxides of silicon, aluminum and carbon. The mineral component of the rocks is 92-96% composed of silicon, aluminum and iron oxides, and the sum of silicon and aluminum oxides is at least 89-90%. The content of SiO2 and Al2O3 in the ash part is in the range of 55-60% and 30-35%, respectively. Coal mass in rocks, depending on ash content. is 20-34% with a content of up to 15-18% volatile compounds. This composition of carbonaceous rocks guarantees the production of a silicon-aluminum alloy with a silicon content of 50-65%, aluminum 10-30% and the rest iron [1-3]. The alloy is smelted in ore-thermal electric furnaces with a constant loading of charge materials and periodic release of smelting products - alloy and slag, and the amount of slag does not exceed 3-5% of the weight of the alloy.

References:
[1] Baisanov S.O., Tolymbekov M.Zh., Takenov T.D. etc. Mastering the technology of electrothermal smelting of ferrosilicon aluminum from coal waste at Ispat-Karmet OJSC. Steel, 2000. No. 7. P. 28-30.
[2] Baisanov S.O., Tolymbekov M.Zh., Karemkov A.A. Chekimbaev A.F. Terlikbaeva A.K. New types of carbonaceous rocks for smelting ferrosilicon aluminum // Steel. 2008. No. 8. – P. 59-61.
[3] Tsymbal V.P., Bogomekov V.I., Tolymbekov M.Zh. and others. Efficiency of using ferrosilicoaluminum for steel deoxidation // Steel, 2000, No. 6. – P. 24

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 Kablanbekov² ; Baimakhan Satbaev³ ; Feruza Berdikulova⁴ ; Nurgali Shalabaev⁵ ; Sergey Yermishin⁴ ; Serik Satbaev⁶ ; Alma Terlikbayeva⁴ ; Abdurassul Zharmenov⁴ ; 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.

SESSION: MineralWedPM3-R7	Torem International Symposium (8th Intl. Symp. on Sustainable Mineral Processing)
Wed. 29 Nov. 2023 / Room: Sunflower
Session Chairs: Fernando Jose Gomes; Session Monitor: TBA

17:55: [MineralWedPM313] OS
SCIENTIFIC RESEARCH AND TECHNOLOGY COMMERCIALIZATION FOR SUSTAINABLE DEVELOPMENT IN THE MINING AND METALLURGICAL INDUSTRY
Abdurassul Zharmenov¹ ; ¹National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan RSE, Almaty, Kazakhstan;
Paper Id: 497 [Abstract]

Science and Technology as described in the FLOGEN Sustainability Framework is the first and most efficient and important pillar to achieve sustainability.  The National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan as the largest scientific institution in the mining and metallurgical industry of the Republic of Kazakhstan and Central Asia countries has used the scientific research and developed new technologies to solve the global problems of traditional deposits depletion, treatment of off-grade and man-grade raw materials, achievement of integrated processing of primary minerals, and achieving the transition to deep and ultra-deep horizons in order to reduce environmental pollution and improve the quality of life of current and future generations. This presentation will describe some of these achievements with special emphasis on the following developments.A new technology that produces an alloy of two incompatible metals – iron and aluminum that simultaneously deoxidizes and inoculates in steel. Developed as part of   "Kazakhstani Alloy" project in cooperation ThyssenKrupp (Germany) and Posco (South Korea) the technology has been patented in numerous countries. A new technology for thermomagnetic beneficiation and dephosphorization of high-phosphorous brown iron ores and concentrates which for the first time treats low-quality brown iron ores and produces a prime concentrate with an iron content of 65% and phosphorus content of no more than 0.25% that fully meets the requirements of metallurgical treatment in terms of chemical and mineral compositions, as well as physical properties.An unusual new technology has been proposed to obtain ferrosilicon with a low content of aluminum and titanium based on the processing of large-tonnage renewable raw materials unconventional for metallurgy - rice husk. A new technology for processing of low-quality, complex oxidized and mixed gold-copper ores with poor gold content based on which more than 20 Kazakhstani and foreign gold processing enterprises have been created. Combined beneficiating and hydrometallurgical technologies for processing low-grade copper-containing raw materials have been introduced at a number of domestic deposits. A new technology and pilot-plant production facilities for the production of stable isotope of osmium, iodine and their compounds that put Kazakhstan on the top 3 countries leading in the production of stable isotopes.New safe mining technologies, the latest innovative automated systems for positioning people and equipment, managing a geotechnological complex at open pit (Jetygara) have been implemented at a number of mines in Kazakhstan.The above new technologies are added to the existing Kazakistani technology for lead smelting, using the KIVCET flash-cyclone-oxygen-electric smelting method, that has been implemented in Bolivia, Italy, Canada, and China that overall, today smelt a tenth of the world's primary lead output.The implementation of these technologies has been made possible by a volume of investments of more than $3.5 billion and the annual output of commodity products at these enterprises at today's prices exceeds $4.0 billion while the total amount of investments in new production facilities based on them in the next 2-3 years will reach $2-2.5 billion. These success stories have tremendously helped achieving sustainability through science and technology and it is an important confirmation of the role of science and technology as forecasted by FLOGEN Sustainability Framework