The material being treated increases its specific surface area with the decrease of particle size, so in the dry PTMS magnetic separator, the specific friction between the particles increases due to the adhesion of the particles to each other. If the direction of the magnetic force is opposite to the direction of gravity, the non-magnetic particles will no longer mix with the magnetic particles in the magnetic part only when the gravity of the particles is greater than the friction caused by the adhesion of the particles between the particles.
Therefore, the minimum particle size of the material to be treated should be limited. The relationship between the separation result of PTMS magnetic separator of 50% hematite and 50% quartz and the material size. It can be seen from this curve that when the particle size of the material is lower than 0.1-0.15mm, the separation index (hematite content β% and recovery ε% in the magnetic part) is greatly reduced.
The use of heavy media PTMS magnetic separator can remove a large number of monomer gangue, so that the amount of ore entering the next process is greatly reduced, so as to improve the production capacity of the concentrator and save the concentration. Because heavy medium beneficiation has such advantages, this beneficiation method is commonly used as a pre-selection in metal ore beneficiation plants.
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