The inclusion of medium intensity magnetic drum separation (MIMS) in combination with jigging may be considered for the beneficiation of the 6-1mm fraction of some friable ore bodies. The following diagram demonstrates some typical flowsheet designs for Iron Ore beneficiation of hard rock and friable ores.
Evolution of the extracted iron ore grade in different countries (Canada, China, Australia, Brazil, United States, Sweden, USSR-Russia, world). The recent drop in world ore grade is due to the big consumption of low grade Chinese ores. The American ore is upgraded between 61% to 64% before being sold.
Exploitation of low-grade iron ore would be quite unique in a South African context as South Africa is well endowed with high-grade iron ore resources. Low-grade iron ore, defined as containing between 20 and 47% iron, is thought to be the primary iron-bearing lithology from which most high-grade ore deposits formed, through different processes of enrichment.
3. RESULTS AND DISCUSSION 3.1 Characterization Studies. The chemical analysis of the iron ore sample is shown in Table 1. The sample contains 56.5% Fe, which is very low-grade in nature. The major impurities are SiO 2 5.6%, Al 2O3 6.2%, P 2O5 0.32% and loss on ignition (LOI) 7.10%.
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A Longi LGS 500 wet high intensity magnetic separator (WHIMS) was used to concentrate a fine, low grade South African hematite ore. The ore was prepared into different size fractions and was ...
The chemical composition of direct-ship and beneficiated iron ores can be divided into high-grade hematite ores, with 64–67% Fe and low SiO 2 and Al 2 O 3, largely from Brazil and West Africa (e.g., Simandou); a number of Australian and other iron ores with ~ 60–62% Fe; high-LOI martite-goethite Australian ores; and high-LOI Australian CID iron ores.
known iron deposits in Sudan, many are of low-grade which require beneficiation to Effective processing of low-grade iron ore through separation techniques 569 found that high intensity magnetic separator tests were limited to very close range of sizes between 2 and 0125 mm By magnetic separation, two products of iron ore and