OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 7 5 The effect of the grinding method on the grain shape coefficient of black silicon carbide Vladimir Nosenko 1, a,*, Daniel Rivas Peres 2, b, Aleksey Aleksandrov 1, c, Aleksandr Sarazov 1, d 1 Volzhsky Polytechnic Institute (branch) of Volgograd State Technical University, 43a Engelsa str., Volzhskiy, 404120, Russian Federation 2 JSC “Volzhsky Abrasive Plant”, 169 F.G. Loginov Str., Volzhsky, 404119, Russian Federation a https://orcid.org/0000-0002-5074-1099, vladim.nosenko2014@yandex.ru; b https://orcid.org/0009-0000-7733-236X, rivas-peres_de@vabz.ru; c https://orcid.org/0000-0003-1986-9139, alexalexal2011@yandex.ru; d https://orcid.org/0009-0007-3052-5691, sarazov_av@mail.ru ART I CLE I NFO Article history: Received: 21 April 2025 Revised: 05 May 2025 Accepted: 05 August 2025 Available online: 15 September 2025 Keywords: Black silicon carbide Fractions Length Width Shape coefficient Grinding methods Correlation and regression analysis Funding The study was carried out with the financial support of JSC Volzhsky Abrasive Plant, Contract no. 4990/ 02/2024-13/48-24. ABSTRACT Introduction. JSC Volzhsky Abrasive Plant is the sole producer of silicon carbide in Russia and the largest producer in Europe. The company employs various methods, equipment, and technologies for grinding abrasive materials, which influence the geometric parameters of the grains. The most prominent and widely used methods for grinding silicon carbide in current production are roller-press grinding and rotary grinding. The purpose of this work is to study the effect of the roller-press and rotary methods of grinding black silicon carbide, which are used at the JSC Volzhsky Abrasive Plant, on the shape factor, length, and width of the grains in the sample fractions. Research methods. The initial material obtained in accordance with the current technological process was selected after crushing in a rod mill. One sample was crushed using the roller-press method, and the other was crushed using the rotary method. The crushed silicon carbide was sieved into fractions using a Ro-Tap sieve analyzer. The geometric parameters and grain shape were determined in five fractions, and 800 grains were measured in each fraction. The horizontal projection of the grain profile was obtained using an Altami SM0870-T optical stereoscopic microscope. Special software was used to process the projections and determine the geometric parameters. Results and discussion. It has been established that the shape factor and grain length follow the maximum value law, while the width follows the normal distribution law. The strength of the correlation between geometric parameters ranges from weak to strong, and the direction of the relationships varies from positive to negative. Graphical dependencies are presented, demonstrating the correlation and regression relationships between the geometric parameters of the grains in the fractions. Rotary grinding results in an average increase of 5% in the number of isometric grains compared to roller-press grinding, while the number of needle-like grains decreases by a factor of 3. The research findings are intended for optimizing the formulation and manufacturing technology of abrasive and refractory products. For citation: Nosenko V.A., Rivas Perez D.E., AleksandrovA.A., SarazovA.V. The effect of the grinding method on the grain shape coefficient of black silicon carbide. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2025, vol. 27, no. 3, pp. 108–121. DOI: 10.17212/1994-6309-2025-27.3-108-121. (In Russian). ______ * Corresponding author Nosenko Vladimir A., D.Sc. (Engineering), Professor, Head of department Volzhsky Polytechnic Institute (branch) of Volgograd State Technical University, 43a Engelsa str., 404120, Volzhskiy, Russian Federation Tel.: +7 904 403-31-74, e-mail: vladim.nosenko2014@yandex.ru Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2025 vol. 27 no. 3 pp. 108–121 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2025-27.3-108-121 Introduction The grain shape of grinding powders has a significant effect on the properties of abrasive tools and the quality of the machined surface of parts [1–3], and is a determining indicator in the manufacture of refractory products [4, 5]. Isometric grains contribute to reducing wear, increasing the durability of abrasive tools, and improving machining performance [6–9]. The grains attain the desired size and shape through a technological process involving multi-stage crushing and grinding of the abrasive material. These operations are performed using various equipment
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