250/5 (10.500 Gs)

The magnetic grid, intended exclusively for industrial use, ensures perfect cleaning of your dry mixtures from ferromagnetic impurities (by ferromagnetic impurities we mean fully magnetic metals such as iron, nickel, cobalt and alloys containing iron, not paramagnetic, very weakly magnetic materials).

For proper operation, the purified mixtures (the material that you pour through the magnetic grid) must be:

• homogeneous,
• dry with good flow properties so that the magnetic grid does not become clogged, see below.

The magnetic grid is suitable for use only in non-continuous operations (during manual cleaning of the magnetic grid, the flow of the purified material must be stopped). It is installed only in vertical pipelines, the tubes must be horizontal (if vertical installation is not possible, do not use this product and contact us to identify another magnetic grid (magnetic separator), or to confirm the suitability of its use), e.g. in the food and chemical industries, in agriculture, in the waste processing industry, in the field of building materials production; see the list of suitable materials below.

The magnetic grid is used as a pre-stage for protecting equipment so that metallic ferromagnetic impurities do not enter devices they could damage, such as mill knives, crushers, nozzles of regranulation and granulation lines, injection molding nozzles, extrusion presses, pressing machines, shredding equipment, fine sieves, ceramic pressing machines, glass presses, etc. It can also be used for purifying the mixture to achieve the highest possible purity, when the grid is placed at the end of the production process just before packaging and dispatch so that no contamination by metallic ferromagnetic material occurs during subsequent operations in the production plant. In this case, immediate sealing of the purified material in closable packaging or other closable containers is assumed. Thanks to the excellently assembled magnetic circuit, a high capture rate of ferromagnetic impurities is achieved (please read the detailed description below of what ferromagnetic metallic impurities this magnetic grid can capture).

The grain size (fraction, size) of the purified material may be max. up to a diameter of 3 mm (3x3x3 mm), of regular shape; the material must be free-flowing, dry, non-sticky and without lumps so that the magnetic grid does not become overloaded (clogged) with material. By the term free-flowing material used in this description, we mean such material that, during free pouring, does not tend to bridge (clump into solid masses), hold itself back spontaneously, and thus prevent free flow through the magnetic grid. Examples of such materials (which flow poorly) may include moist, greasy materials, but also materials that at first glance appear dry and seemingly free-flowing, yet their natural property is that they flow poorly. Such an example is smooth, very finely milled flour or various very finely milled starches. Materials that we recommend and that, according to our expert opinion and experience, are suitable for pouring (purifying) through this magnetic grid are listed below (please note the above maximum permissible fraction/grain size). If you do not find the material from which you require metallic ferromagnetic impurities to be separated (the material to be purified) in the list below, do not use this product and contact us for further clarification and possible recommendation of another magnetic separator/grid, or approval that this type is suitable for magnetic separation of your material as well.

List of suitable materials for magnetic separation using a magnetic grid:

• granulated sugar
• powdered sugar (beware of overloading with material here; we recommend pouring more slowly and distributing evenly across the entire surface of the grid) 
• cereals, various types
• lentils (in the case of frequent use for large quantities of lentils, abrasion may occur; we draw attention to the possible faster wear of the protective tubes)
• crushed cocoa beans
• crushed PET bottles (beware of overloading with material here; we recommend pouring more slowly and distributing evenly across the entire surface of the grid; rather suitable for smaller capacity quantities)
• rubber regranulate
• rubber granulate
• chili seeds
• animal feed, free-flowing, characteristically similar to flour up to coarser fractions, however max. grain size 3 mm (must not be abrasive)
• coconut flour
• cocoa
• flour (beware of overloading with material here; we recommend pouring more slowly and distributing evenly across the entire surface of the grid)
• poppy seeds (only poppy seeds, not whole poppy heads)
• ground corn
• meat and bone meal
• matcha powder
• pudding powder (there is a risk of bridging and clogging with material; pour slowly and evenly across the entire magnetic grid)
• plastic granulate and regranulate
• plastic shred
• ash (not glowing hot, but cooled to the operating temperature of the magnetic grid)
• food-grade free-flowing non-abrasive mixtures
• dried milk
• dried chocolate
• dried coconut
• dried herbs
• dried spices (finely ground or very finely crushed)
• dried instant soups
• dried whey (beware of overloading with material here; we recommend pouring more slowly and distributing evenly across the entire surface of the grid)
• sesame seeds
• enamel, i.e. glass mass (we draw attention to increased abrasion and the increased risk of wearing through the protective tubes)
• salt (we draw attention to possible shorter service life due to the material used; this depends on the frequency of use)
• bulk starches, e.g. corn starch
• building materials (free-flowing and non-abrasive)
• tapioca pearls

We emphasize again that materials must be dry, free-flowing (must not tend to bridge), non-abrasive, with maximum regular granulometry up to a diameter of 3 mm (3x3x3 mm). The throughput capacity varies depending on the material from which you require ferromagnetic impurities to be separated; it cannot be determined unambiguously and differs for each type of material. If you are not sure about the throughput or capacity flow, do not use this magnetic grid, contact our sales and technical department for a recommendation of another type of magnetic separator or for approval of the use of this type.

Please note that the wall thickness of the protective tube is very small in order to achieve high magnetic induction (magnetic force) and pull-off force on its surface. Therefore, please also consider the height from which you will pour the material onto the magnetic grid (drop height). The height from which the material is poured onto the magnetic grid must not exceed 1 m. However, this is individual for each type of material. It is not possible to precisely determine and prescribe from what height a given material should be poured. If material is poured from a great height, the protective tubes may bend or be punctured, and the entire product may be damaged. If the height from which your material will be poured onto the magnetic grid is greater than 1 m, do not use this product and contact our sales and technical department for a recommendation of another type of magnetic separator/grid or for approval of the use of this type.

This magnetic grid captures (separates) metallic ferromagnetic particles from sizes of 1 µm and smaller (ferromagnetic in character, immeasurable, magnetic dust) up to a size of dia. 3 mm (3x3x3 mm), which is the maximum fraction (size) of material that may fall onto the magnetic grid and that may be poured through the magnetic grid. In exceptional cases, the magnetic grid may capture larger metallic objects up to dia. 5 mm (5x5x5 mm). However, incidental occurrence of these impurities is assumed to be max. up to 1% of the total hourly capacity of the material being poured through (regular cleaning of the magnetic grid from ferromagnetic impurities is assumed; this does not mean that the entire 1% of larger ferromagnetic impurities may remain on the magnetic grid for the entire period of pouring the hourly capacity of material). The content of these larger ferromagnetic impurities must not be higher. If the occurrence of these larger ferromagnetic impurities in your material is higher, do not use this magnetic grid and contact our technical and sales department for expert advice.

Objects larger than those specified by us (max. diameter 3 mm, 3x3x3 mm), except for the ferromagnetic impurities described above in incidental quantities, must not fall onto the magnetic grid. If you are concerned about the presence of larger ferromagnetic or other impurities and admixtures, it is necessary to install a sieve with a mesh size of max. 3 mm upstream so that these larger undesirable objects are captured before entering the magnetic grid (after installing the sieve, it is necessary to consider reducing the capacity load and throughput of the magnetic grid). The sieve is not included in the delivery of the magnetic grid. We also point out the possibility that your material may contain a large amount of fine metallic impurities (very fine metallic magnetic dust smaller than 1 µm), which may coat the magnetic tubes and block the magnetic grid (fine magnetic particles bind even the poured material to themselves and overload the entire system). At the same time, the magnetic force/efficiency of the magnetic grid will be greatly reduced. If the magnetic tubes become coated immediately after starting the passage of material through the magnetic grid and completely “hide” in iron dust, this is not a defect of the magnetic grid, but the magnetic separation must be reinforced by another magnetic separator/grid or the magnetic grid must be cleaned more frequently; your material probably contains a very large amount of ferromagnetic particles. 

 If you are not able to ensure:

• the absence of particles larger than 3 mm in diameter (3x3x3 mm) in your material
• an amount of larger ferromagnetic particles (up to 5 mm) of less than 1% of the hourly capacity
• a minimal occurrence of fine metallic dust in your material

do not use this magnetic grid and contact our sales and technical department for a recommendation of another type of magnetic separator or for approval of the use of this type.  

The magnetic grid is designed to capture as many metallic ferromagnetic impurities as possible. However, everything depends on the amount of these ferromagnetic impurities present in your material. It is not possible to bindingly guarantee the capture of all ferromagnetic impurities. It is always necessary to consider the specific technology and capacities. If necessary, other types of magnetic separation/magnetic grids must be installed upstream or added. Please do not rely solely on this one magnetic grid. If you are not sure, do not use this type of magnetic grid and contact our specialists in the field of magnetic separation at any time.

If you place the magnetic grid into your own structure (box, hopper, chute…), please note that such structures must not be made of metallic (magnetic) material. There is a risk of injury and a significant reduction in magnetic force. All structures into which the magnetic grid is installed must be made of non-magnetic materials. The minimum distance of metallic (magnetic) structures from the magnetic grid is 200 mm.

This grid can be placed freely into hoppers or integrated directly into piping systems using the Jacob system. Seals and Jacob fastening clamps are not included in the delivery.

The magnetic grid must not be used for the separation of stainless steel (commonly referred to as stainless), even if it appears magnetic/paramagnetic (such materials may occur, for example, after passing through various crushers or after other forms of deformation; likewise these paramagnetic stainless steels may be used for the manufacture of various sieves). 

The magnetic grid is not intended either for the magnetic separation of non-ferrous non-magnetic metals or for the magnetic separation of components or their parts that contain ferromagnetic metals (e.g. plastic parts with pressed-in residues of metallic parts, crushed window frames with residues of metal strips, wooden pellets with pressed-in fine wires…). If you need to separate such ferromagnetic impurities as well, do not use this magnetic grid and contact our specialists in the field of magnetic separation, who will advise you which other magnetic separator to use or by what type to supplement your separation setup.

Please note that during cleaning of the magnetic grid it is not possible to use pressurized water or soak the magnetic cores. Only a dry cloth may be used for cleaning, or well-dried compressed air to blow off residual metallic impurities and separated material.

Be very careful when cleaning the magnetic grid; the magnetic cores are very strong and their attachment to metallic objects may cause injuries by pinching or pressure snapping. Do not place them on anything magnetic (tables, workbenches, stair treads, floors…).

This magnetic grid is not intended for use in any environment classified as an explosion-hazard environment (ATEX).

The magnetic grid is intended for indoor use only. Do not install it outdoors.

Procedure for measuring magnetic induction

The measurement is performed using a standard gaussmeter with a probe thickness of 0.75 mm at the point with the structurally highest magnetic induction - at the pole extensions, or at the lowest point of the arc of the magnetic circuit. We repeat the test 3 times, each time at a different point of the magnetic circuit, and calculate the average magnetic induction.

Procedure for measuring pull-off force

We measure using a polished steel standard with a diameter of 10 mm and a height of 20 mm. The measurement is performed at the point with the structurally highest pull-off force - at the pole extensions, or at the lowest point of the arc of the magnetic circuit. We record the force at which the standard detached. We repeat the test 3 times and calculate the average pull-off force.

For your information, 10 N = approx. 1 kg.

As confirmation of measurement and guarantee of the measured values, we issue an original measurement report, which is included with each delivered piece of magnetic separator and is issued specifically for your particular magnetic rod (the report states the warehouse and production number)

Operating temperature: 

from -20 °C to +45 °C (from -4 to +113 °F)

Exceeding the operating temperature is possible in certain cases; however, it is important to realize that it may lead to impairment of the device's functionality or shortening of its service life. In such a case, consultation with the manufacturer is necessary to clarify to what extent the device may be exposed to higher temperatures without damage and while maintaining safe operation.

WARNING: 

The resulting pull-off force and magnetic induction depend on many factors - e.g. the dimensions of the standard, the air gap between the standard and the tested magnetic circuit, the thickness of the measuring probe, surface contamination, the surface finish of the standard, etc. The stated values of pull-off force and magnetic induction were measured under ideal conditions given by the test environment. However, these values may change depending on the specific type of environment, where e.g. operating conditions and subsequent wear may affect the product’s efficiency and measurement results. The stated values must therefore be regarded as indicative and any deviations from them cannot be considered a defect. To determine the exact value of magnetic induction and pull-off force in a specific case, it is necessary to carry out your own measurement. If the determined pull-off force values are not sufficient for you because they do not correspond to the stated values, you may use the guaranteed option of returning the goods within 30 days under the conditions stated in the terms and conditions and purchase another type of magnetic separator. These 30 days serve precisely for testing the goods, and after this period the seller may refuse to accept the return of the goods.

Copyright:

We do not agree, do not wish, and hereby do not grant anyone any consent to copy individual parts or the entire text. Modification of the text using identical word combinations resulting in semantic similarity and agreement with our text is also prohibited. We do not wish and do not agree to any placement of our text anywhere on other websites, in professional journals, studies, final theses at secondary schools and universities without the prior consent of Magsy. In the event of a request to use our text or parts thereof, please contact us at any time.