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首页> 外文期刊>International Journal of Mining Engineering and Mineral Processing >Improvement in Cr:Fe Ratio of Indian Chromite Ore for Ferro Chrome Production
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Improvement in Cr:Fe Ratio of Indian Chromite Ore for Ferro Chrome Production

机译：铬铁矿生产中铬铁矿中Cr：Fe比的提高

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About 40% of the Indian chromite ore reserves are suitable for metallurgical purpose due to higher Cr:Fe ratio. The present investigation emphasized on the liberation and beneficiation characteristics of Indian chromite oreto improve the Cr: Fe ratio. The off grade chromite sample ofSukinda region, India analysed 40.8% of Cr2O3 with Cr:Fe ratio of 1.7 and 5.8% of SiO2 which was not suitable for metallurgical industry. Detailed characterisation studies were carried out to predict the theoretical limits to improve the Cr/Fe ratio. Mineralogical investigation by using QEMSCAN studies revealed that chromite, hematite, goethite, Fe Silicates and kaolinite are dominating phases in the ore.Half of the Fe was present in the chromite spinel, whereas other 30% and 20% werereported from silicates and iron minerals, respectively. It was predicted from characterisation that, product can be enriched to 2.48 Cr:Fe ratio by discarding the silicate/locked silicate, Fe silicate gangue minerals whereas product quality can be upgraded maximum to 3.58 of Cr:Fe ratio by separating all iron bearing minerals. The beneficiation studies revealed that, the product can be enriched to having Cr:Fe ratio of 2.31 and 3.35 by gravity concentration (wet shaking table) and high intensity magnetic separation (Induced Roll Magnetic Separator) respectively. So the high intensity magnetic separator (Induced Roll Magnetic Separator) was suggested for the quality improvement of the off grade chromite ore ofSukinda region, India.
机译：由于较高的Cr：Fe比，印度约40％的铬铁矿储量适合冶金用途。本研究强调印度铬铁矿的释放和选矿特性，以提高Cr：Fe的比例。印度Sukinda地区的品位亚铬铁矿样品分析了Cr：Fe比为1.7的Cr 2 O 3 的40.8％和SiO 2 不适合冶金工业。进行了详细的表征研究，以预测提高Cr / Fe比的理论极限。通过QEMSCAN研究进行的矿物学研究表明，铬铁矿，赤铁矿，针铁矿，硅酸铁和高岭石是矿石中的主要相，铬铁尖晶石中存在一半的铁，而硅酸盐和铁矿物中分别报告了30％和20％，分别。通过表征可以预测，通过丢弃硅酸盐/硅酸盐锁定的Fe硅酸盐ue石矿物，可以将产品富集到2.48 Cr：Fe，而通过分离所有含铁矿物，可以将产品质量最大提高到Cr：Fe比的3.58。选矿研究表明，通过重力浓缩（湿摇床）和高强度磁选（感应辊式磁选机）可分别将产品浓缩至Cr：Fe比为2.31和3.35。因此，建议采用高强度磁选机（感应辊式磁选机）来改善印度Sukinda地区品位的铬铁矿矿石的质量。

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