| Popis: |
There is a substantial production increase especially in the iron-steel industry, which is the main consumption area of manganese ores, besides battery and chemical industries. However, it is seen that high-grade raw material resources are decreasing with the increasing demand in the world. For this reason, presenting low-grade ores to the industry as raw materials is of importance today. In this study, in order to evaluate the low-grade manganese reserves in Turkey, classification and enrichment experiments with a roll-type dry magnetic separator were carried out on manganese ore from İzmir-Karaburun region. First, after grinding (size reduction) and classification processes, the ore was divided into three different size fractions as -1150+850, -850+425 and -425+150μm then the effect of size on magnetic separation performance was investigated. As a result of magnetic separation tests, a concentrate with 69.39% recovery and 39.42% Mn grade was obtained from the coarse size fraction feed having 17,21% Mn. In the mid-size fraction, a concentrate with a recovery of 78.25% and 31.30% Mn grade was obtained from the feed containing 15.15% Mn, while obtaining a magnetic product with a recovery of 86.97% and 28.56% Mn grade from the fine size fraction feed containing 16.85% Mn. When the results obtained were examined, it was determined that the concentrate obtained in the coarse-grained fraction with a grade of 39.42% Mn was determined to be a salable product for the iron-steel industry, while additional concentration studies were required for other size ranges. |
