The article investigates the possibility of reducing the yield of the fine fraction (0-10 mm) during the crushing of high-carbon ferrochrome. The relevance of the study is due to the fact that an increased amount of fines deteriorates technological performance, increases metal losses, and reduces the output of commercial product. Pilot industrial trials were conducted to study the effect of deoxidation of liquid ferrochrome with secondary aluminum of grade AV87 under a standard casting scheme. Changes in ingot structure, crystallization conditions, and the material’s tendency to crack formation were evaluated. The influence of specific aluminum consumption on ingot formation and the subsequent generation of fine size fractions during crushing was analyzed. It was established that deoxidation contributes to a reduction in gas content and an increase in ingot density, which decreases the proportion of brittle fracture. Based on the results of the trials, an optimal range of aluminum consumption was determined, ensuring minimal fines yield and stable process parameters. The obtained results can be used to improve the casting technology of high-carbon ferrochrome under industrial conditions.

It was noted that the use of aluminum deoxidation does not require significant changes to the existing casting technology and can be implemented without substantial capital investment, thereby improving the economic efficiency of ferrochrome production and enhancing the overall quality of commercial products in metallurgical industry conditions.

Thus, optimization of aluminum consumption makes it possible to regulate deoxidation and crystallization processes, reducing internal defects and improving the structural homogeneity of ingots in industrial metallurgical practice.

ZHAILYKANOV M.A.

Production support manager, smelting shop № 1, master’s degree student, Aktobe Ferroalloys Plant - a branch of JSC «TNK «Kazchrome», K. Zhubanov Aktobe regional university, Aktobe, Kazakhstan

E-mail: Maksat.Zhailykanov@erg.kz, https://orcid.org/0009-0001-8031-0011

USSENOV A.A.

Production support manager, smelting shop № 1, Aktobe Ferroalloys Plant - a branch of JSC «TNK «Kazchrome», Aktobe, Kazakhstan

E-mail: akulan.ussenov@erg.kz, https://orcid.org/0009-0007-5268-2065

1. Bazhirov T.S., Procenko V.S., Bazhirov N.S., Dauletiyarov M.S., Serikbaev B.E., Bazhirova K.N. Perspektivy kompleksnogo ispol'zovaniya shlakovyh othodov proizvodstva ferrohroma dlya polucheniya zharostojkih materialov. Izvestiya Nacional'noj akademii nauk Respubliki Kazahstan. Seriya himii i tekhnologii. 2020. № 6. S. 111–119.
2. Kaliakparov A.G., Baltabaev S.R., Strahov V.M., Muhtar A.A. Proizvodstvo vysokouglerodistogo ferrohroma s ispol'zovaniem antracita. Metallurg. 2018. T. 61. № 9–10. S. 765–769. DOI: https://doi.org/10.1007/s11015-018-0561-x
3. Salkynbaev B.ZH., Ulmaganbetov N.A., Dosekenov M.S., Lazhan S.A. Optimizaciya uzla drobleniya plavil'nogo cekha №4 Aktyubinskogo zavoda ferrosplavov. Vestnik Aktyubinskogo regional'nogo universiteta imeni K. ZHubanova. 2023. №3 (73). S. 22–30.
4. Hansen M., Anderko K. Struktury dvojnyh splavov. M.: Metallurgiya, 1962. 608 s.
5. SHank F. Struktury dvojnyh splavov. M.: Metallurgiya, 1973. 760 s.