Beneficiation and flowsheet development of a low grade iron ore: a case study

IF 0.5 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Bulletin of the Mineral Research and Exploration Pub Date : 2020-12-01 DOI:10.19111/bulletinofmre.834182

Ö. Özcan, Ahad Aghlmandi Harzanagh, E. Orhan, Ş. Ergün

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Abstract

In the present study a detailed characterization followed by beneficiation of low grade iron ore was studied. The Run of Mine (R.O.M) sample assayed 21.91 % Fe, which is very low grade in nature. The impurities are SiO2 26.25%, MgO 20.48%, CaO 5.85%, Al2O3 1.86% and loss on ignition (LOI) 12.71%. A Davis Tube test was performed for the assessment of the separability of magnetic ores by low intensity magnetic separators. The heavy liquid test was carried out to evaluate the possible response of the sample by the gravity concentration technique. The samples were subjected to jigging, dry low intensity magnetic separation (DLIMS) and shaking table tests. Thus a sufficient concentrate could not be obtained in +1 mm by using jigging and DLIMS. The obtained results show that the a high grade iron concentrate (>65% Fe) with lower recoveries was obtained from shaking table tests by using -1 mm fraction. According to the results a flowsheet was developed. From the developed flowsheet, it is possible to obtain pellet grade concentrate with 65.41% Fe, 2.54% SiO2, 2.79% MgO, 0.70% CaO and 0.32% Al2O3. with 21.42% weight recovery. The overall gangue rejection recovery of the circuit is over 95%.

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某低品位铁矿选矿及流程开发实例研究

在本研究中，对低品位铁矿石选矿后的详细特征进行了研究。原矿（R.O.M）样品测定了21.91%的Fe，这是一种性质非常低的品位。杂质SiO2为26.25%，MgO为20.48%，CaO为5.85%，Al2O3为1.86%，烧失量为12.71%。进行了重液试验，以通过重力浓缩技术评估样品的可能响应。对样品进行跳汰、干式低强度磁选（DLIMS）和振动台试验。因此，通过使用跳汰和DLIMS不能在+1mm内获得足够的精矿。结果表明，采用-1mm粒级进行摇床试验，可获得回收率较低的高品位铁精矿（>65%Fe）。根据结果，制定了流程图。根据开发的流程图，可以获得含65.41%Fe、2.54%SiO2、2.79%MgO、0.70%CaO和0.32%Al2O3的球团级精矿。重量回收率为21.42%。电路的整体排矸回收率超过95%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of the Mineral Research and Exploration GEOSCIENCES, MULTIDISCIPLINARY-

CiteScore

1.20

自引率

20.00%

发文量

审稿时长

10 weeks

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