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Magnetic separation process
The magnetic separation process normally is a dry-wet combined ore dressing process for magnetic mineral. The process is mainly a three-stage magnetic separation treatment for ore powder, then wet separation process for ore slurry. The magnetic field force of magnetic separation will be used is 400~1200GS, the rotational speed of the magnetic drum is 60-320 rpm, the wet material is dehydrated to make the concentrate ore powder.
In magnetic separation process, magnetic separator plays an important role in the process. The mined ore is first crushed by a jaw crusher to a required size, then uniformly fed into the ball mill through an elevator and a feeder, the ore is pulverized and grinded. The ore fines ground by the ball mill enter the next process: classification. The spiral classifier cleans and classifies the ore mixture by the principle that the specific gravity of the solid particles is different and the rate of precipitation in the liquid is different. The magnetic substances in the washed and classified mineral mixture will be separated by magnetic force and mechanical force when passing through the magnetic separator.
The combined dry-wet magnetic separation process can achieve 90% utilization rate of ore, and it is less water consumption during the process, cost effective, no air pollution.
The following process flow is the magnetic separation process of magnetite
magnetic separation process of magnetite
Magnetic separator
Working principle of magnetic separator