What are the key factors that affect magnetic separator efficiency?

Recovery by magnetic separation is all about magnetic susceptibility. Ferromagnetic minerals such as magnetite are much easier to recover because of their greater magnetic susceptibility. There are many paramagnetic minerals with similar magnetic susceptibility which makes separation difficult. This is why knowledge of the ore mineralogy is critical. Magnetic susceptibility is proportional to magnetic particle mass. Therefore reduced particle size and reduced libération will reduce recovery.

The feed material is crucial. It's particularly important to understand its metallurgy and the presence of magnetics or para-magnetics within. From hands-on experience in operating and optimizing rougher and cleaner magnetic separators, many factors come into play. However, the quality of the feed can significantly influence the outcome. Pulling rougher concentrate from heavy oxides and clays can be challenging based on experience. A coating can form around the magnetic particle, preventing it from being effectively picked up.

There are several factors that affect the efficiency of the magnetic separator. Some examples include: - The intensity of the magnetic field, which must be strong enough to attract magnetic particles. - The feeding speed of the material, which must be controlled to ensure that all particles are exposed to the magnetic field. - The size of the particles, which must be compatible with the size of the magnetic separator. - The moisture of the material, which can reduce the efficiency of the magnetic separator. - The presence of other non-magnetic substances in the material, which may interfere with the separation.

The optimization of magnetic force required for each application with sufficiently liberated minerals is primarily determined by the product of magnetic flux density and the gradient matching the particle sizes and the characteristics of the minerals to be separated. This is achieved by proper/optimized magnetic circuit designs and in the case of WHIMS/HGMS by also selecting the best matrix elements. There is a lot more to say and certainly some of the comments I see need to be enhanced - even corrected.

For drum separators drum diameter and width are proportional to capacity. The gap between the bottom of the tank and the drum represents magnetic gradient. A smaller gap is required for fine particle recovery but remember to reduce throughput. For WHIMS remember the following : Feed particle size STRICTLY 100% minus 1 mm No ferromagnetic minerals in the feed Select magnetic matrix according to feed PSD Carefully optimise solids feedrate and feed slurry velocity. Manufacturers tend to be overly optimistic !

For all magnetic separators feed slurry density is critical. High density results in the crowding of the magnetic particles by the non magnetic particles. A low density will impact the volumetric capacity. 20 to 30% by mass is a good range. For magnetic separation circuit design remember the following : Rougher - enough magnetic field strength for recovery Scavenger - reduce slurry SG and increase magnetic field strength to maximize recovery Cleaner - reduce slurry SG and decrease magnetic field strength to maximize non magnetic rejection

Particle size and composition Optimized liberation is important to control the particle size distribution of material fed to the magnetic separator. This size range ensures that mixed particle ( ore and gangues mixture ) with magnetic properties do not report to the concentrate. Magnetic intensity The magnetic field strength generated by the magnetic separator is decisive in attracting and capturing magnetic particles. Higher field strength is suitable for separating materials with low response to magnetic fields while low field strength is suitable for separating material with high response to magnetic field. Flow rate and feed particles concentration Higher flow rate lowers the contact time between the particles and the magnet feed.

L’énergie magnétique est un énergie noble qui peut participer encore en grande échelle dans notre modification énergétique pour un futur 0% m énergie fossile.efficace et propre mais a besoin encore des recherches scientifiques plus profondes et plus approfondies dans tous les secteurs.

It is important to carry out tests and analyzes to determine the best possible conditions and thus optimize the effectiveness and efficiency of the magnetic separator. The goal is to maximize the recovery of useful heavy minerals while minimizing costs and resource use. Ultimately, the optimization of the magnetic separation process contributes to the sustainability and profitability of the mining industry, allowing a more efficient and sustainable extraction of mineral resources.

Run your fines through a ball mill make sure everything is at least -100 when you do this you increase your production fine to 25% more