Liberation spectra around the Wet Magnetic Drum

Now select the Wet Magnetic Drum feed (ball mill discharge), concentrate and tailings streams. Clear the ball mill feed stream if this is still selected. Click on view graph.

The feed stream is the ball mill discharge. We have already discussed this in the previous section. The tailings stream is made up of almost 50% of liberated Chert particles, and an accumulation of low grade particles. It also contains about 7% of liberated magnetite particles. In the actual plant, this stream is treated in a scavenging unit, and the liberated Magnetite is recovered. Their presence in the tailings stream is due to the by-pass factor in the Drum. The concentrate stream contains no liberated Chert particles. That is the reason the ball mill feed does not contain this type of particles. From about 30% Magnetite content and up, the Drum recovers most particles, which is expected. The concentrate stream contains about 27% liberated Magnetite particles.