At present, rare earth ore mined in China and other countries in the world, the content of rare earth oxides is only a few percent, or even lower. In order to meet the production requirements of smelting, the ore minerals and gangue minerals will be processed before smelting. and other useful minerals apart to increase the content of rare earth oxide, a rare earth to meet the obtained rare earth ore metallurgical requirements. The beneficiation of rare earth ore is generally carried out by flotation, and is often supplemented by re-election and magnetic separation to form a variety of combinations of beneficiation processes.
The rare earth deposit of the Baiyun Obo mine in Inner Mongolia is a carbonate rock deposit of iron dolomite. It is associated with rare earth minerals in the main component iron ore (in addition to fluorocarbon antimony ore, monazite, there are also several kinds of antimony and rare earth minerals). The produced ore contains about 30% iron and about 5% rare earth oxide. First in the mine
After the large ore is broken, it is transported by train to the concentrating plant of Baotou Iron and Steel Group Co., Ltd. The task of the concentrator is to increase the Fe2O3 from 33% to more than 55%. First, grind and classify on a conical ball mill, and then use a cylindrical magnetic separator to select a primary iron concentrate of 62 to 65% Fe2O3. The tailings continue to undergo flotation and magnetic separation to obtain a secondary iron concentrate containing 45% Fe2O3 or more. The rare earth is enriched in the flotation foam and the grade is 10-15%. The enrichment can be selected from a coarse concentrate having a REO content of 30% by a shaker, and after reprocessing by the ore dressing equipment, a rare earth concentrate having a REO of more than 60% can be obtained.
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