DÜŞÜK TENÖRLÜ MANYETİT CEVHERİNİN MANYETİK AYIRMA VE YERÇEKİMİ İLE ZENGİNLEŞTİRİLMESİ: TANE BOYU ETKİSİ

Year 2021, Volume: 60 Issue: 1, 31 - 39, 01.03.2021

Hikmet Sis Tekin Karaağaç Mustafa Birinci Tufan Kıyak

https://doi.org/10.30797/madencilik.796806

Abstract

This study compares the efficiency of different methods in beneficiation of iron ore from Doğanşehir (Malatya) region. It is a low grade ore with 27.43 % Fe content that requires concentration to meet the specifications of blast furnace feed. The ore mainly contains magnetite, ferro-actinolite and magnesioferrite. The collected samples were classified into different size fractions after size reduction and then subjected to different gravimetric and magnetic separation methods for concentration. The results showed that particle sizes affected the concentrations to a large extend, but wet magnetic separation yielded comparably better results than gravimetric methods. A concentrate assaying 65.66 % Fe and 0.38 % K2O+Na2O was obtained with 78.11 % recovery by wet magnetic separation. It was concluded that concentrates meeting blast furnace specifications could be obtained from this low grade iron ore. It was also concluded that the proposed separation flow sheet can be applied to similar low grade iron ores in the region.

Keywords

Iron ores, magnetite, magnetic separation, gravity separation, scrubbing

Supporting Institution

Inonu University

Project Number

Scientific Research Projects Unit of Inonu University (Malatya) through project number FYL-2017-857.

Thanks

This research was financially supported by the Scientific Research Projects Unit of Inonu University (Malatya) through project number FYL-2017-857.

ENRICHMENT OF LOW GRADE MAGNETITE ORE BY MAGNETIC AND GRAVITY SEPARATIONS: EFFECT OF PARTICLE SIZE

Abstract

This study compares the efficiency of different methods in beneficiation of iron ore from Doğanşehir (Malatya) region. It is a low grade ore containing 27.43 % Fe which requires concentration to meet the specifications of blast furnace feeds. The main mineral composition of ore is magnetite and also contains magnesioferrite, ferro-actinolite and calcite minerals. The collected samples were classified into different size fractions after size reduction and then subjected to different gravimetric and magnetic separation methods for concentration. The results showed that particle sizes affected the concentrations to a large extent and generally cleaner concentrates were obtained at finer sizes for a certain separation method. On the other hand, wet magnetic separation yielded comparably better results than gravimetric methods. A concentrate assaying 65.66 % Fe and 0.38 % K2O+Na2O was obtained with 78.11 % recovery by wet magnetic separation. It was concluded that concentrates meeting blast furnace specifications could be obtained from this low grade iron ore. It was also concluded that the proposed separation flow sheet can be applied to similar low grade iron ores in the region.

Keywords

Iron ores, magnetite, magnetic separation, gravity separation, scrubbing

Project Number

Scientific Research Projects Unit of Inonu University (Malatya) through project number FYL-2017-857.

References

• Akbari H, Noaparast M, Shafaei SZ, Hajati A, Aghazadeh S, Akbari H. 2018. A beneficiation study on a low grade iron ore by gravity an magnetic separation. Russian Journal of Non-ferrous metals, 59 (4), 353-363. doi: 10.3103/S1067821218040028
• Harris DC. 2010. Quantitative chemical analysis. 8. Edition, W. H. Freeman and Company, New York, Chapter 1-4 Stoichiometric Calculations for Gravimetric Analysis.
• He J, Liu C, Hong P, Yao Y, Luo Z, Zhao, L. 2019. Mineralogical characterization of the typical coarse ore particles and the potential to discharge waste gangue using a dry density-based gravity separation. Powder Technol. 342, 348-355. doi: 10.1016/j.powtec.2018.10.010
• Nayak N P, Pal BK. 2013. Beneficiation of banded hematite jasper using Falcon concentrator: An alternative to iron ore resources, Research Open Journal of Mineral and Mining Engineering, 1 (6), p 8-14.
• Ozcan O, Celik I B. 2016. Beneficiation routes for upgrading iron ore tailings with teethered bed separator, Separation Science and Technology, 51 (17), 2844-2855. doi: 10.1080/01496395.2016.1218514
• Seifelnassr A A S, Moslim EM, Abouzeid A Z M. 2012. Effective processing of low-grade iron ore through gravity and magnetic separation techniques, Physicochem. Probl. Miner. Process., 48 (2), 567-578. doi.org/10.5277/ppmp120220
• Sivrikaya O, Arol A I. 2012. Evalution of low grade iron ore deposit in Erzincan-Turkey for iron ore pellet concentrate production, Physicochem. Probl. Miner. Process., 48 (2), 475-484. doi: doi.org/10.5277/ppmp120213
• Tripathy SK, Banerjee PK, Suresh N, Murthy YR, Singh V. 2017. Dry high intensity magnetic separation in mineral industry-A review of present status and future prospects, Mineral Processing and Extractive Metallurgy Review, 38 (6), 339-365. doi: 10.1080/08827508.2017.1323743
• Vapur H, Top S, Altiner M, Uçkun Ş, Sarikaya M. 2019. Comparison of iron ores upgraded with Falcon concentrator and magnetic separators assisted by coal reduction-conversion process, Particulate Science and Technology. doi: 10.1080/02726351.2018.1548532
• Worldsteel Association, 2019. World steel in figures 2019, URL:https://www.worldsteel.org/en/dam/jcr:96d7a585-e6b2-4d63-b943-4cd9ab621a91/World%2520Steel%2520in%2520Figures%25202019.pdf