Washan beneficiation plant using a three-stage closed-circuit and two-stage crushing system-wide closed-circuit grinding system, and weak magnetic - intensity magnetic separation process respectively (FIG. 3). The main production indicators of the factory in 1998 are shown in Table 1. Figure 3 Concentration process of the concave mountain plant Table 1 Production indicators of selected plants in 1998
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product name Production / 10,000 t Yield/% grade/% Recovery rate/% Raw ore 502.89 100.00 29.12 100.00 Concentrate 181.23 36.04 63.86 79.02 Tailings 321.67 63.96 9.55 20.98
The produced iron concentrate has a V 2 O 5 of 0.3% and a low grade, which is used for smelting steel to extract vanadium . In recent years, fine mineral rate of 30.64 percent iron, about TFe64.09%, 79.82% recovery of iron, tailings TFe9.23%, ore TFe26.04%, iron ore in V 2 O 5 is still 0.3%.