{"id":8566,"date":"2019-10-17T11:26:11","date_gmt":"2019-10-17T03:26:11","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=new&p=8566"},"modified":"2026-07-04T16:23:54","modified_gmt":"2026-07-04T08:23:54","slug":"faq-separation-magnetique","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/fr\/new\/faq-magnetic-separation\/","title":{"rendered":"FAQs of Magnetic Separation"},"content":{"rendered":"

Introduction :<\/strong> Magnetic separation is an important separation technology in the field of mineral processing and is widely used for the sorting and recovery of various types of ores. Whether it involves ferrous ores such as iron and manganese ores or the extraction of non-ferrous metals such as tungsten and tantalum ores, magnetic separation technology plays a crucial role. This article systematically summarizes the most common questions regarding magnetic separation technology to help you gain a comprehensive understanding of its principles, applications, and equipment selection.<\/strong><\/p>\n

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\nChina is one of the earliest countries to understand the magnetic phenomenon. The ancient Chinese discovered that magnets can attract iron but not gold, silver, copper, or other metals. They also discovered the directivity of magnets and produced the earliest compass – Sinan.
\nL'aurore est \u00e9galement form\u00e9e par l'action d'un champ magn\u00e9tique.<\/p>\n

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1. What is Magnetic Separation?<\/h2>\n

A method of mineral separation in a non-uniform magnetic field based on the magnetic difference of various minerals.<\/p>\n

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2. What Are The Applications Of Magnetic Separation?<\/h2>\n

S\u00e9paration des minerais de m\u00e9taux ferreux (fer, mangan\u00e8se, chrome, etc.) ;
\nNon-Ferrous Metal<\/a> (tungsten, tantalum, etc.) and rare metals separation;
\nS\u00e9paration des minerais non m\u00e9talliques (amiante, diamant, kaolin, etc.) ;
\n\u00c9limination des composants magn\u00e9tiques des mat\u00e9riaux solides et des d\u00e9chets.<\/p>\n

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3. What Is The Magnetic Separation Working Principle?<\/h2>\n

Sous l'action du flux d'eau, les particules de minerai se d\u00e9tachent.
\nIn the magnetic field, the magnetic ore particles are aggregated to form a lump of magnetic material, which is attracted to the cylinder. As the cylinder rotates, the non-magnetic mineral, such as gangue, falls off, and the magnetic lump that is finally attracted to the cylinder surface is the concentrate ore. The concentrate goes to the edge of the cylinder, which has the weakest magnetic strength, and is discharged into the concentrate tank under the action of the flushing water. Non-magnetic or weakly magnetic minerals are left in the slurry and finally discharged, which are the tailings.<\/p>\n

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4. What’s The Precondition of Magnetic Beneficiation?<\/h2>\n

(1) There must be an uneven magnetic field of sufficient strength and gradient.
\n(2) There must be a certain magnetic difference between the minerals, that is, the specific susceptibility of the two minerals is different.
\n(3) For minerals with strong magnetic properties, the magnetic force they receive is greater than the sum of various mechanical forces.<\/p>\n

La condition n\u00e9cessaire \u00e0 la s\u00e9paration des particules de minerai magn\u00e9tique est que la force magn\u00e9tique des particules de minerai magn\u00e9tique soit sup\u00e9rieure \u00e0 la force combin\u00e9e des forces m\u00e9caniques qui s'y opposent.<\/p>\n

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5. Why is Magnetic Separation Only In Non-uniform Magnetic Fields?<\/h2>\n

Dans un champ magn\u00e9tique uniforme, le minerai n'est soumis qu'\u00e0 un couple, de sorte que la direction de son axe long est parall\u00e8le \u00e0 la direction du champ magn\u00e9tique.
\nDans un champ magn\u00e9tique non uniforme, les particules de minerai ne sont pas seulement affect\u00e9es par le couple, mais aussi par la force magn\u00e9tique. Les particules de minerai tournent et se d\u00e9placent dans la direction o\u00f9 le gradient du champ magn\u00e9tique augmente, et sont finalement absorb\u00e9es par la surface du p\u00f4le magn\u00e9tique.
\nDe cette mani\u00e8re, les particules magn\u00e9tiques ayant des propri\u00e9t\u00e9s magn\u00e9tiques diff\u00e9rentes sont s\u00e9par\u00e9es, de sorte que la s\u00e9paration magn\u00e9tique ne peut \u00eatre r\u00e9alis\u00e9e que dans un champ magn\u00e9tique non uniforme.<\/p>\n

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6. What is The Classification of Magnetic Minerals?<\/h2>\n

Min\u00e9raux fortement magn\u00e9tiques<\/strong>: It is easy to pick out in a weak magnetic separator<\/a> with magnetic field strength H=900~1800Oe.
\nThere are a few such minerals, mainly magnetite, pyrrhotite, titanomagnetite, zinc-iron spar, and the like.
\nMin\u00e9raux faiblement magn\u00e9tiques<\/strong>: In the magnetic field strength H = 6000 ~ 2000 Oersted, magnetic beneficiation is somewhat difficult, and some are easy.
\nMainly iron-manganese ore, hematite, specularite, limonite, siderite, rhodochrosite, etc.; some titanium, chromium, tungsten-containing minerals; biotite, hornblende, epidote, chlorite, olivine, garnet, pyroxene, etc.;
\nMin\u00e9raux non magn\u00e9tiques<\/strong>: The magnetic separation method is not available currently.<\/strong>
\nIl existe de nombreux min\u00e9raux de ce type, notamment<\/strong><\/p>\n