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Taimei Mine is located in Guangdong Province. A Department of weathered granite Medium ferroniobium DEPOSITS shell. Currently mining areas include Boluo 521 and Taimei 524, of which 521 is the main mining area. The ore contains Nb 2 O 5 0.029%. The main metallic ore minerals are columbite, microlite, aeschynite, hafnium-rich zircon, thorite, xenotime, gangue mainly quartz, feldspar. Mineral grain crystals: coltan is generally less than 0.1 mm, and yttrium-rich zircon is generally less than 0.074 mm. The mine is the main production base for China's current raw materials.
Beneficiation plant at two roughing and selected portions. The rough selection uses a gravity-magnetic-heavy process (see Figure 1). The ore (water gun mining) is selected for screening, and parts larger than 0.5 mm do not contain ore. 0.5～0.3mm material is selected by shaker, less than 0.3mm material is concentrated by φ12m thickener, thickener overflow (-0.075mm) is discarded, concentrator sanding (0.3～0.074mm) is given to φ1.5m The ring wet magnetic separator has undergone one rough selection and one sweep, and the magnetic part is selected by a shaker. The obtained fine ore concentrate grade of coltan is 7% to 8% Nb 2 O 5 , and the recovery rate is 44.75%. The factory is further processed.
Figure 1 Taimei antimony ore roughing plant process
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A re-election-magnetic selection-electrical selection-floating reselection combination process is used (Fig. 2). Columbite ore to crude screened, greater than 4 mm free of mineral waste material, through the material of less than 4 mm hydraulic classifier classifying boxes, respectively shaker material selected high levels of niobium concentrate tin, niobium concentrate, fine views Mine three products. The various products are sieved into two grades of +0.9 mm and -0.9 mm, and the tantalum ore concentrate is selected by a double or three-disc dry magnetic separator. In the magnetic selection mine, the halo is selected by floating re-election, the non-magnetic materials are sorted by a shaker, the shaker concentrate is returned to the classification box, and the zircon is selected by the mine in the shaker. Production index: NdFeite concentrate contains 60% Nb 2 O 5 , the recovery rate is 95% (42.51% for the original ore), and some zircon and monazite products are also recovered.
Figure 2 Taimei Yankuang Select Plant Process