XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 1935
closer to feeding addition, while in the 10 is closer to the
concentrate removal. The tests were performed in posi-
tions 1, 3, 5 and 7 and drum speed of 100, 80 and 40%
of the maximum one. Initially, the magnet was fixed in an
intermediate position and tests were performed at differ-
ent speeds. A cleaner stage was also evaluated, and the feed
was composed by the concentrate of all tests of the rougher
stage. The results, presented at Figure 4, demonstrated that
lower speeds produced slightly better quality and higher
recoveries. Additionally, they showed a small experimen-
tal error due to differences in the replica results. In bough
rougher and cleaner stages the magnet position showed lit-
tle impact (Figure 5), where, in the rougher stage, just posi-
tion 2 presented a significantly lower performance and for
cleaner stage, just position 1presented a significantly better
performance.
Since the effect of the variables was not so expressive,
another test was run in intermediate conditions, drum speed
Figure 2. Effect of particle size distribution on the iron content in the concentrate and recoveries for mass,
iron and magnetite
Figure 3. Particle size distribution of feeding and product of Bond Work Index test
closer to feeding addition, while in the 10 is closer to the
concentrate removal. The tests were performed in posi-
tions 1, 3, 5 and 7 and drum speed of 100, 80 and 40%
of the maximum one. Initially, the magnet was fixed in an
intermediate position and tests were performed at differ-
ent speeds. A cleaner stage was also evaluated, and the feed
was composed by the concentrate of all tests of the rougher
stage. The results, presented at Figure 4, demonstrated that
lower speeds produced slightly better quality and higher
recoveries. Additionally, they showed a small experimen-
tal error due to differences in the replica results. In bough
rougher and cleaner stages the magnet position showed lit-
tle impact (Figure 5), where, in the rougher stage, just posi-
tion 2 presented a significantly lower performance and for
cleaner stage, just position 1presented a significantly better
performance.
Since the effect of the variables was not so expressive,
another test was run in intermediate conditions, drum speed
Figure 2. Effect of particle size distribution on the iron content in the concentrate and recoveries for mass,
iron and magnetite
Figure 3. Particle size distribution of feeding and product of Bond Work Index test