The important factor that affects the magnetic separation effect of the magnetic separator is the particle size of the ore fed into the magnetic separation
For most ores, the size of the given ore indicates the separation degree of the ore monomer, that is, the degree of separation between magnetic ore particles and gangue particles. If the particle size of the fed ore is small, it means that the separation of mineral monomers is high, and satisfactory separation index can be obtained; if the particle size of the fed ore is relatively coarse, it means that the minerals are not sufficiently dissociated and the separation of monomers is not high, on the contrary, there are more contiguous bodies That is, the magnetic particles and the gangue are still quite partly combined. Since the conjoined body is also quite magnetic, a considerable part of the selection pair can be selected, which reduces the grade of the concentrate. Therefore, it is required that the minerals fed into the magnetic separator must fully achieve monomer separation. For ore with coarser grain size, as long as the mineral and gangue have reached the monomer separation, the grain size is not necessarily too fine. Although the grain size of such ore is sometimes coarser, the sorting quality is not low. The main reason is that the grain size of the ore is coarse and the useful minerals and gangue are separated after grinding to a certain extent.
The pulp concentration is one of the main factors that affect the magnetic separation effect of the magnetic separator, which mainly refers to the overflow concentration of the classifier.
If the slurry concentration is too high, resulting in too high separation concentration, it will seriously affect the quality of the concentrate. At this time, the concentrate particles are easily covered by the finer gangue particles and cannot be separated by the package, so they are selected together to reduce the grade. If the slurry concentration is too small, the sorting concentration is too low, and it will increase the flow rate and shorten the separation pair, so that some small magnetic particles that should have a chance to come up will fall into the tailings and increase the tailings grade and cause losses. Therefore, the slurry concentration should be adjusted according to needs. The adjustment at the magnetic separator is mainly based on the size of the water blown to the ore, but the most important thing is that the concentration of the grading overflow must be completed according to the requirements of magnetic separation. The maximum feed slurry concentration should not exceed 35%, and is generally controlled at about 30%, which should be determined according to actual conditions.