J. Abishev Chemical and Metallurgical Institute (Karaganda, Kazakhstan)

Mukhtar A. A., Head of Laboratory, Candidate of Engineering Sciences, Associate Professor, bkosimova@mail.ru
Makashev A. S., Senior Researcher
Atakhan M. M., Engineer
Gabdullin S. T., Head of Laboratory, Candidate of Engineering Sciences

This article presents the results of research carried out in order to develop a processing technology for high-phosphorus oolitic brown iron ores from the Kirovskoe deposit in Kazakhstan with the following initial composition: 37.95 wt% of iron, 0.56 wt% of phosphorus, 3.30 wt% of aluminum oxide, and 29.14 wt% of silicon oxide. The material composition of the ore, studied by X-ray phase analysis, is represented mainly by the iron mineral of hydrogoethite, with an insignificant amount of hematite as an admixture. The nonmetallic part of the sample mainly consisted of clay minerals, silicon and aluminum oxides, and was removed through desliming. The resulting product was subjected to dry magnetic separation (DMS) in a high-intensity magnetic field, which rendered a magnetic product with an iron content of 48.18 wt%. In order to improve the product grade, the DMS product was further subjected to magnetizing roasting aimed to convert iron hydroxides into magnetite and remove hydrate moisture. The magnetic roasting cinder then underwent wet magnetic separation in a weak magnetic field to produce a concentrate containing 64.13 wt% of iron, 0.941 wt% of phosphorus, 5.09 and 3.92 wt% of aluminum and silicon oxides, respectively. The throughout recoveries into the final concentrate were: 74.86 % for iron, 75.23 % for phosphorus, and 67.70 and 5.96 % for aluminum and silicon oxides, respectively, with a concentrate yield of 44.30 %. Based on the relevant laboratory research, a process has been developed, including desliming, magnetizing roasting, and magnetic separation, that renders high-grade iron concentrates.

This research was supported under an agreement concluded between the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan and the Zh. Abishev Chemical and Metallurgical Institute (grant IRN No. AP19675375).

1. Slipchenko B. V. On two genetic types of oolitic iron ores of the Lisakovsky deposit (Northern Kazakhstan). Geologicheskiy Zhurnal. 1981. Vol. 41, No. 6. pp. 53–61.
2. Bekmukhametov A. E., Bilyalov B. D. Metallogeny of exogenous iron ores of the Torgai trough and prospects for their industrial development by the Lisakovsky GOK. Аlmaty: SRC «Gylym», 2003. 366 p.
3. Ericsson M., Löf A., Löf O. Iron ore market report 2019–2020. Gornaya Promyshlennost'. 2021. No. 1. pp. 74–82.
4. Yanitsky A. L. Oligocene oolitic iron ores of Northern Turgay and their genesis. Moscow: Publishing House of the USSR Academy of Sciences, 1960. 220 с.
5. Ramanaidou E. R., Wells M. A. 13.13 – Sedimentary hosted iron ores. Treatise on Geochemistry. 2014. Vol. 13. pp. 313–355.
6. Ivanova M. V., Pirogov B. I., Astakhova Yu. M., Bronitskaya E. S. Influence of morphostructural characteristics of iron ores of the Tonoda area on the ore preparation process. Modern problems of complex processing of difficult-to-process ores and technogenic raw materials. Materials of the International scientific conference «Plaksin Readings – 2017». Krasnoyarsk, September 12–15, 2017. pp. 31–34.
7. Lebedok A. V., Markworth L. Modern iron ore processing: challenges and solutions from ALLMINERAL. Gornaya Promyshlennost'. 2022. No. 3. pp. 84–88.
8. Opalev A. S., Alekseeva S. A. Methodological substantiation of the choice for optimal modes of equipment operation during the stage-wise concentrate removal in iron ores beneficiation. Zapiski Gornogo Instituta. 2022. Vol. 256. pp. 593–602.
9. Kilin V. I. Effect of magnetic treatment upon magnetic properties of magnetite ores. Obogashchenie Rud. 2010. No. 6. pp. 23–26.
10. Gzogyan S. R., Shcherbakov A. V. Improving the quality of concentrates of Stoilensky GOK JSC with the use of magnetic-gravity separation. Obogashchenie Rud. 2020. No. 6. pp. 3–8.
11. Pelevin A. E. Iron ore beneficiation technologies in Russia and ways to improve their efficiency. Zapiski Gornogo Instituta. 2022. Vol. 256. pp. 579–592.
12. Pelevin A. E., Kornilkov S. V., Dmitriev A. N., Bagazeev V. K. Quality improvement of magnetite concentrate in separate processing of different iron ore types and varieties. Gornyi Informatsionno-analiticheskiy Byulleten'. 2021. No. 11-1. pp. 306–317.
13. Mukhtar A. A., Mukhymbekova M. K., Makashev A. S., Savin V. N. Thermomagnetic enrichment and dephosphorization of brown iron ore and concentrates. Steel in Translation. 2018. No. 9. pp. 553–557.
14. Xiao J. H., Zou K., Wang Z. Studying on mineralogical characteristics of a refractory high-phosphorus oolitic iron ore. SN Applied Sciences. 2020. Vol. 2, Iss. 6. DOI: 10.1007/s42452-020-2871-4
15. Mukhtar A. A., Mukhymbekova M. K., Nuskabekov Zh. S., Makashev A. S., Korovushkin V. V. Influence of heat treatment of Abail ironstone ore on final product quality. Gornyi Informatsionno-analiticheskiy Byulleten'. 2015. No. 4. pp. 129–134.
16. Mansour F. A., Ould Hamou M., Merchichi A. Beneficiation of oolitic iron ore sourced from Gara Djebilet using coal-based direct reduction prior to magnetic separation. ENP Engineering Science Journal. 2022. Vol. 2, No. 2. pp. 72–74.
17. Li W., Liu D., Han Y., Li Y., Guo R. An innovative study for pretreatment of high-phosphorus oolitic hematite via hightemperature heating: Phase, microstructure, and phosphorus distribution analyses. Advanced Powder Technology. 2023. Vol. 34, Iss. 5. DOI: 10.1016/j.apt.2023.103996
18. Pan J., Lu S., Li S., Zhu D., Guo Z., Shi Y., Dong T. New route to upgrading the high-phosphorus oolitic hematite ore by sodium magnetization roasting-magnetic separationacid and alkaline leaching process. Minerals. 2022. Vol. 12, Iss. 5. DOI: 10.3390/min12050568
19. Yu W., Sun T., Cui Q., Xu C., Kou J. Effect of coal type on the reduction and magnetic separation of a highphosphorus oolitic hematite ore. ISIJ International. 2015. Vol. 55, Iss. 3. pp. 536–543.
20. Malyshev V. P. Mathematical planning of metallurgical and chemical experiment. Alma-Ata: Nauka, 1977. 35 p.