Studies of the thermal stability of briquettes based on microsilica

A. Baisanov; N. Vorobkalo; Y. Makhambetov; Y. Mynzhasar; Z. Zulhan

doi:10.31643/2023/6445.40

Authors

A. Baisanov Zh.Abishev Chemical and Metallurgical Institute
N. Vorobkalo Zh.Abishev Chemical and Metallurgical Institute
Y. Makhambetov Zh.Abishev Chemical and Metallurgical Institute
Y. Mynzhasar Zh.Abishev Chemical and Metallurgical Institute
Z. Zulhan Bandung Institute of Technology

DOI:

https://doi.org/10.31643/2023/6445.40

Keywords:

thermal stability, briquettes, microsilica, silicon briquettes, briquetting, silicon waste

Abstract

The object of study in this work is microsilica. Microsilica is a pulverized technogenic waste generated during the smelting of technical silicon in industries. The intended use of this material is to obtain the highest quality grades of technical silicon in the end result without the use of expensive quartz. Microsilica is a finely dispersed powder, the direct processing (without preliminary preparation) of which into technical silicon is impossible in ore-thermal furnaces. That requires the manufacture of high-strength briquettes based on it, meeting all the requirements for raw materials for ore-thermal furnaces. In this paper, the authors present the results of a study of the thermal stability of microsilica-based briquettes in order to optimize the physicochemical properties of the resulting briquettes. The tested microsilica briquettes with various carbonaceous reducing agents (screenings of coke of thermo-oxidative coking, screenings of charcoal, etc.) were obtained on a large-scale laboratory roller briquetting press ZZXM-4. The evaluation of the thermal stability of the briquettes was carried out according to the method in which the resulting briquettes are subjected to thermal shock followed by abrasion on a special drum. The thermal resistance of a briquette is defined as the ratio of the weight of the main body of the briquette after the abrasion test to the sum of the weight of the main body and the crumbled material. The dependence of thermal stability on the granulometric composition of briquettes was also determined. The optimal granulometric composition was determined, with which the briquettes have satisfactory thermal stability. Thus, the most technologically advanced granulometric composition of the briquetting charge for reduction smelting in an ore-thermal furnace was established. It is best to use briquettes with granulometric compositions of the appropriate ratio of fractions 0-1; 1-3; 3-5 mm with the following proportions 35/35/30 and 60/20/15, as well as briquettes with particle size distribution within these ranges of variation.

Downloads

Download data is not yet available.

Author Biographies

A. Baisanov, Zh.Abishev Chemical and Metallurgical Institute

Candidate of Technical Sciences, Professor, Head of the Laboratory of Pyrometallurgical Processes, Zh.Abishev Chemical and Metallurgical Institute, Ermekova str., 63, 100009, Karaganda, Kazakhstan.

N. Vorobkalo, Zh.Abishev Chemical and Metallurgical Institute

Master of Technical Sciences, Junior Researcher of the Laboratory of Pyrometallurgical Processes, Zh.Abishev Chemical and Metallurgical Institute, Ermekova str., 63, 100009, Karaganda, Kazakhstan.

Y. Makhambetov, Zh.Abishev Chemical and Metallurgical Institute

PhD, Head of the Laboratory of Ferroalloys and recovery processes, Zh.Abishev Chemical and Metallurgical Institute, Ermekova str., 63, 100009, Karaganda, Kazakhstan.

Y. Mynzhasar, Zh.Abishev Chemical and Metallurgical Institute

Master of Technical Sciences, Junior Researcher of the Laboratory of Pyrometallurgical Processes, Zh.Abishev Chemical and Metallurgical Institute, Ermekova str., 63, 100009, Karaganda, Kazakhstan.

Z. Zulhan, Bandung Institute of Technology

Dr.-Ing., Lecturer/Researcher of Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology,Indonesia.

References

Protopopov A, Protopopov M, Suleimenov E, Aimenov Z, Altynbekov R. Study of silicon production process in ore-smelting furnace and optimization of technological process.Kompleksnoe Ispolzovanie Mineralnogo Syra= Complex Use of Mineral Resources.2022, 326(3):68-80. https://doi.org/10.31643/2023/6445.30

Data of LLP Tauken Temir (Electron resource) 2022. (Аccess date: 12.11.2022), URL: http://www.tks-temir.kz/

NikolayZobnin,Torgovets Anatoliy,Pikalova Irina,Yussupova Yuliya,Atakishiyev Sergey. Influence of Thermal Stability of Quartz and the Particle Size distribution of Burden Materials on the Process of Electrothermal Smelting of Metallurgical Silicon. Oriental Journal of Chemistry. 2018;34:1120-1125. http://dx.doi.org/10.13005/ojc/340265

Glazev M, Bazhin V. On the recycling and use of microsilica in the oil industry. E3S Web of Conferences. 2021, 266. https://doi.org/10.1051/e3sconf/202126602010

Freitas L, MagriniA. Waste Management in Industrial Construction: Investigating Contributions from Industrial Ecology.Sustainability. 2017;9(7):1251. https://doi.org/10.3390/su9071251

Dvořáček J, Vodzinský V, Domaracká L. Industrial Wastes and Economics oftheir Utilization. Metalurgija.2006;45(2):141-143. https://hrcak.srce.hr/6527

Yi Zhong,Sun Heng,Wan Jian,Li Chao. A New Process for Highly Effective Utilization of Industrial Solid Wastes —Sialite Technology. Advanced Materials Research. 2009;66:210-213. https://doi.org/10.4028/www.scientific.net/AMR.66.210

Li Y, Zhang J, Liu Z, et al. Reduction Mechanism of Iron Oxide Briquettes by Carbonaceous Materials Extracted from Blast Furnace Dust.Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science. 2019;50(5): 2296-2303. https://doi.org/10.1007/s11663-019-01628-7

Snyman M, SnymanN. Improved ultrafine coal dewatering using different layering configurations and particle size combinations. Journal of the Southern African Institute of Mining and Metallurgy. 2019,119. https://doi.org/10.17159/2411-9717/2019/v119n3a10

Bruno M. An investigation of microsilica by thermoanalytical methods. Thermochimica Acta. 1998; 318(1-2):125-129.

Ahmad Subhan, Umar A, Masood Amjad, NayeemMohammad. Performance of self-compacting concrete at room and after elevated temperature incorporating Silica fume. Advances in concrete construction. 2019;7:31-37. https://doi.org/10.12989/acc.2019.7.1.031

Mater J.Guide for the use of silica fume in concrete. ACI. 1995;92(4):437-440.

Zakharov SV, Vasiliev KO, Yermolovich E V. Assessment of environmental friendliness of the use of silicon production waste. School of postgraduate students of the All-Russian scientific conference. Irkutsk. 2017,16-20.

Bernd F. Microsilica-characterization of a unique additive. IIBCC 2006 -Sao Paulo, Brazil. October 15 –18.2006; 10.

Elkin KS. Production of metallic silicon in Russia —state and prospects. "Non-ferrous metals and minerals 2014": materials of the sixth international congress. 16-19 September 2014, Krasnoyarsk.2014.

Dubenskiy MS, Kargin A A. Mikrokremnezem -otkhod ili sovremennaya dobavka? [Microsilica is a waste or a modern additive?]. Vestnik Kuzbasskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of the Kuzbass State Technical University]. 2012; 1(89):119-120.(In Russ.).

SzelagM. Development of cracking patterns in modified cement matrix with microsilica. Materials. 2018; 11(10):1928. https://doi.org/10.3390/ma11101928

Kuz’min MP,Larionov LM, Paul K. Chu. New Methods of Obtaining Al–Si Alloys Using Amorphous Microsilica. International Journal of Metal casting. 2019; 14:207-217.

Ozhogin VV. Osnovy teorii i tekhnologii briketirovaniya izmelchennogo metallurgicheskogo syria: monografiya. Mariupol: PGTU (Fundamentals of the theory and technology of briquetting shredded metallurgical raw materials: monograph. Mariupol: PSTU). 2010,442.

Ravich BM.Briketirovaniye v tsvetnoy i chernoy metallurgii[Briquetting in non-ferrous and ferrous metallurgy]. D. M.: «Metallurgiya». 1975, 356.

Degel R,Fröhling Ch, Kalisch M, Hecker E. Oterdoom H. Innovative electric smelter solutions of the SMS group for the silicon industry. The Fourteenth International Ferroalloys Congress Energy efficiency and environmental friendlinessare the future ofthe global Ferroalloy industry. 2015;4:122-132.