Concentrates and Oxides
(V oxide)
Tungsten concentrates
Tungsten metal and its chemicals being important compound for various applications including special steels and alloys, drilling and tooling materials, electronics and chemicals is being mined and dressed through the World mostly out from two kinds of minerals - sheelite and wolframite, which reach the market appropriatelly as sheelite and wolframite concentrates. These two products are being used for upstream processing into higher value added products, such as Tungsten Oxides, Tungsten Carbides, Tungsten metal, Ferrotungsten, etc.
Sheelite concentrate contains valuable W units in form of CaWO4 with some other impurities like Mn, P, Si, Cu, S etc.
Wolframite concentrate contains W units in form of (Fe, Mn) WO4 with impurities of S, P, Si, Sn, Sb, Mo, As, etc.
- free flowing gray powder size appox 200 microns by down
- free flowing sandy fines size approx 3 mm by down
- 1 ton net double big bags or steel drums on pallets
- Sheelite concentrate (flotational): WO3 50-53%, WO3 30-40%
- Wolframite concentrate (gravitational): WO3 50-60%, WO3 40-50%
