The iron element is in a very finely dispersed state with jasper, so-called iron silicate; further, it is formed into fine-grained hematite below 10 microns, fine-grained or floating drops, and jasper. Hematite (lignite) with iron at around 5%. At this time, the specific magnetization coefficient of jasper increased, which naturally made it difficult to obtain high-grade concentrates by strong magnetic separation.
There is also a small amount of hematite (lignite) infecting fine quartz, and the amount is not large, but it is widely distributed. Therefore, in the single measurement, the quartz of this fine iron mineral is classified as continuum. Causes of coarse stone size and poor monomer dissociation.
Therefore, in actual production, a large part of the problems encountered in iron ore beneficiation equipment is that the properties of the ore have not been studied in detail. When the hematite content is large, it also affects the strong magnetic separation, causing the loss of iron in the tailings, and also the reason for the high tailings grade and low recovery rate. The useful minerals of the mixed ore include strong ores, semi-pseudo-hematite, and a large amount of weak magnetic minerals-pseudo-hematite and limonite.
The gangue mineral also contains a large amount of weak magnetic mineral pyroxene, and a certain amount of mica, jasper and so on. This has caused great difficulties in the recovery of iron, which is also a large discrepancy between the actual working efficiency and the designed output of the beneficiation equipment. It can be seen from a large number of experiments that the specific gravity and specific magnetic susceptibility of pyroxene and biotite are relatively high, which will cause difficulties in the separation of pyrite and pyroxene biotite.