It's a mix 50/50 in weight of tungsten carbide particles with a size between 40 and 210 µm (density 10 g/dm3) and nickel particles with a size between 20 and 150 µm (density 8 g/dm3).
the simpliest way is to separate WC and Co powders in an air classifier. An equipment which is suited for fine classifying operations should work for your powders.