You can solve problems at your own factory! Encyclopedia of coolant filtration equipment "Kuraroka" " Magnetic separator

Magnetic separator

What is a magnetic separator?

Device that uses magnetic force to separate objectsis a magnetic separator. They are used to remove metallic foreign matter from powder and to separate loaded steel plates one by one. Since separation is performed by magnetic force, it is possible to separate metals that have the property of sticking to or separating from magnets. It is useful for avoiding the risk of contamination of products with metallic foreign matter and for reliably separating blank materials adhering to each other with oil.

The method of producing magnetic force is,Electromagnetic and permanent magnet typeIt is Permanent magnet type has almost no risk of demagnetization and can be used semi-permanently.

How the Magnetic Separator works

Magnetic separators use magnets to attract and separate metal shavings.Magnetic drum to absorb metal shavings.The waste is then sandwiched between squeezing rollers to remove water and then scraped off, collecting only chips such as polishing debris and sludge sludge.

For example, in the grinding process, the workpiece is processed while the grinding fluid is applied, so the shavings after grinding and the abrasive grains of the grinding wheel are mixed in the grinding fluid. In order to separate and remove them before the tank fills up with grinding debris, a magnet is used to separate and discharge the grinding debris.

Ferrites and rare earths are mainly used for magnets in magnetic drums. Rare earths are more expensive than ferrites, though,It has 10 times more magnetic energy.In many cases, rare earth magnets are selected when it is necessary to separate materials that are difficult to be attracted by magnets.

Applications of Magnetic Separators

There are two types of applications: for machine tools and for material separation. For machine tools, magnetic separators are installed on grinding machines, shaving machines, honing machines, and various types of machines that cut castings.Removal of chips and sludge from grinding machine cutting oilThe purpose of the project is to

For use in material sorting applications,Recovery of metals from industrial waste and bulky waste; recycling of resources such as aluminum, tires, wood chips, and animal feed; recycling of ores, furnace tailings, and coal; recovery of iron from casting sand and dust incineratorsand others. It is also used to separate metallic foreign matter in food products.

Features and types of magnetic separators

Machine tool separators collect chips by passing them through a magnetic separator when coolant returns from the machine to the coolant tank.Separators for machine tools are characterized by high separating efficiency.Some products are capable of collecting 90% of weak magnetic materials of approximately 20 to 30 μ. Rare earth magnets are used to achieve high magnetic flux density. Running costs are low, and there is no need to replace filters. If a cyclone is installed, even fine abrasive grains can be collected. Chips in the coolant tank can be removed, reducing the frequency of equipment cleaning and coolant replacement. This also improves the efficiency of the machine tool operation.

Permanent magnetic separators feature high and lasting magnetic forceIt is. It does not generate Joule heat, which tends to be a problem with the electromagnetic type. Although it tends to be smaller and lighter than the electromagnetic type, it provides a magnetic field comparable to that of the electromagnetic type. Robust structure makes installation, handling, and maintenance easy.

Summary of Magnetic Separators

We have introduced the features and mechanism of the magnetic separator.

Magnetic separators are devices that separate objects with magnetic force
Magnet attracts and separates metal shavings
Electromagnetic and permanent magnet types are available, with the permanent magnet type featuring stable high magnetic force

The scale of the magnetic separator to be selected and the type of magnet to be used differ for machine tools and for material separation. Even for machine tools, it is important to select the required processing capacity based on the type of coolant, flow rate, and amount of chips to be discharged. Select the appropriate magnet drum magnet type and squeezing roller material.

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Coolant filtration equipment is used to filter sludge generated from equipment. There are a variety of products available depending on the intended use, so it is important to determine "whether the coolant filtration equipment is suitable for the purpose" and "whether the equipment is suited to the characteristics of sludge.

Filter filtration system capable of filtering all "fine" sludge of 3μm or less Filter filtration system capable of filtering all "fine" sludge of 3 microns or less

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Reference: Sun Maintenance Koki official website (https://www.smk-web.co.jp/index.html)