The principle of magnetic separation method

Magnetic separation is a mineral processing method that separates minerals according to the difference in magnetism between the particles of the sorted minerals and the magnitude of the magnetic force in the magnetic field. According to the different magnetization properties of various substances after being subjected to the magnetic field, any substance that can be magnetized is easily attracted by the touching pole, and any substance that cannot be magnetized or has very weak magnetization properties cannot be attracted by the magnetic pole. In order to achieve the purpose of separation.

According to the magnetic field strength of the magnetic separator, can be divided into strong magnetic separation and weak magnetic separation; according to the media used in the separation, and divided into wet magnetic separation and dry magnetic separation. Magnetic separator is widely used in resource recovery, timber industry, mining industry, kiln industry, chemical, food and other workshops. It is suitable for wet magnetic separation of magnetite, magnetic pyrite, roasted ore, ilmenite and other materials with particle size below 3mm, and also used in the iron removal operation of coal, non-metallic ore, building materials and other materials. As long as the separated minerals or mineral aggregates have appropriate magnetic difference and suitable particle size, almost all of them can be used for beneficiation by magnetic separation.

Most commonly used in the separation of magnetite and other minerals between iron-bearing minerals, such as rare metal minerals, various iron minerals, manganese minerals and wolframite, garnet, wolframite, hornblende, etc.. In order to increase the magnetic properties of weakly magnetic minerals, sometimes it is necessary to magnetize and roast such minerals, and then carry out magnetic separation to improve the sorting effect.

Let's briefly introduce the classification of magnetic separation equipment again:

1. The source of the magnetic field is divided into two categories: fixed magnets and electromagnets. Generally speaking, the magnetic field of electromagnets is stronger.

2. According to the characteristics of iron removal process, dry type and wet type are divided into two categories, the dry type is used to separate the iron chips in the raw material gravel and dry powder, and the wet type is used to separate the iron powder in the slurry.

3. According to the structure of the equipment is divided into roller type, pulley type. Hanging type, filtering type and several other types.

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