1. The most important factor affecting the effect of magnetic separation is to give the magnetic separation to the ore size.
For most ores, the thickness of ore feed particle indicates the separation degree of ore monomer, namely the degree of separation of magnetic ore particle and gangue particle. If the granularity is small, it indicates that the separation degree of mineral monomer is high and satisfactory separation index can be obtained. If the particle size of the ore is coarse, it means that the mineral is not fully dissociated, and the separation degree of monomer is not high. On the contrary, there are more connected bodies, that is, magnetic particles and gangue are still a considerable part of together. Due to its considerable magnetism, the separation of a considerable part can be selected, so that the grade of the concentrate is reduced. Therefore, it is required to give the magnetic separator minerals must fully achieve monomer separation. For the ore with coarse dissemination size, as long as the mineral and gangue have reached monomer separation on the line, not necessarily fine granularity. Although such ore sometimes coarse grain size, but the quality of separation is not low, the main reason is that the ore dissemination grain size is coarse, grind to a certain extent useful minerals and gangue will be separated.
2. Pulp concentration is one of the main factors affecting the magnetic separation effect of the magnetic separator, which mainly refers to the overflow concentration of the classifier.
If the concentration of pulp is too high, resulting in high concentration of separation, it will seriously affect the quality of concentrate. Because at this time, the concentrate particles are easy to be covered and wrapped by finer gangue particles, and the separation is not open, so that the grade is reduced. If the concentration of slurry is too small, that is, the concentration of separation is too low, it will cause the increase of flow velocity and shorten the separation between pairs, so that some fine magnetic particles that should have had the opportunity to come up will fall into the tailings, which will increase the grade of tailings and cause losses. Therefore, pulp concentration should be adjusted according to the need. The adjustment at the magnetic separator is mainly by the size of the mine blown water to adjust, but the most important is that the classification of overflow concentration must be completed according to the requirements of magnetic separation. The maximum slurry concentration can not exceed 35%, generally controlled at about 30%, to be determined according to the actual situation.
