DN 200/5 (80 °C, 9.000 Gs, 93 N)

A magnetic grate designed exclusively for industrial use ensures perfect cleaning of your dry mixtures from ferromagnetic contaminants (by ferromagnetic contaminants we mean fully magnetic metals such as iron, nickel, cobalt, and iron-containing alloys—not paramagnetic, very weakly magnetic materials).

For proper operation, the mixtures being cleaned (the material you pour through the magnetic grate) must be:

• homogeneous,
• dry with good free-flowing properties to prevent clogging of the magnetic grate—see below.

The magnetic grate is suitable for use only in non-continuous operations (during manual cleaning of the magnetic grate, the flow of the material being cleaned must be stopped). It is installed only in vertical piping; the tube must be horizontal (if vertical installation is not possible, do not use this product and contact us so we can recommend a different magnetic grate (magnetic separator) or confirm suitability of use), e.g., in the food and chemical industries, agriculture, waste processing, and the building materials industry—see the list of suitable materials below.

The magnetic grate is used as a pre-stage to protect equipment so that ferromagnetic metal contaminants do not enter machines they could damage, such as mill knives, crusher knives, nozzles of regranulation and granulation lines, injection molding nozzles, extrusion presses, pressing stations, shredding equipment, fine screens, ceramic pressing stations, glass presses, etc. It can also be used for cleaning the mixture to the highest possible purity, where the grate is placed at the end of the production process just before packaging and dispatch to prevent any further contamination by ferromagnetic metal during subsequent operations in the plant. In this case, it is assumed that the cleaned material is immediately sealed into closable packaging or other sealable containers. Thanks to an excellently designed magnetic circuit and a flow-through labyrinth created by the spreading circular steel, a high capture rate of ferromagnetic contaminants is achieved (please read the detailed description below of what ferromagnetic metal contaminants this magnetic grate can capture).

The grain size (fraction, size) of the material being cleaned may be up to a maximum diameter of 3 mm (3x3x3 mm), with a regular shape; the material must be free-flowing, dry, non-sticky, and without lumps so that the magnetic grate does not become overloaded (clogged) with material. By “free-flowing material” in this description we mean material that, when flowing by gravity, does not tend to arch (bridge), clump into solid masses, or self-retain and thus prevent free flow through the magnetic grate. Examples of such poorly flowing materials can be moist or greasy materials, but also materials that appear dry and seemingly free-flowing, yet naturally flow poorly. One example is smooth, very finely milled flour or various very finely milled starches. Materials that we recommend and that, in our professional opinion and experience, are suitable for pouring (cleaning) through this magnetic grate are listed below (note the maximum allowable fraction/grain size stated above). If you do not find the material from which you require separation of ferromagnetic metal contaminants (the material to be cleaned) in the list below, do not use this product and contact us for further clarification and a possible recommendation of another magnetic separator/grate, or for approval that this type is also suitable for magnetic separation from your material.

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

- granulated sugar

- powdered sugar (beware of material build-up; we recommend feeding more slowly and distributing evenly over the entire grate area) 

- cereals, various types

- lentils (with frequent use for large quantities of lentils, abrasion may occur; we warn of potentially faster wear of the protective tubes)

- crushed cocoa beans

- crushed PET bottles (beware of material build-up; we recommend feeding more slowly and distributing evenly over the entire grate area; more suitable for smaller throughput quantities)

- rubber regranulate

- rubber granulate

- chili seeds

- animal feed, free-flowing, similar in character to flour up to coarser fractions but max. grain size 3 mm (must not be abrasive)

- coconut flour

- cocoa

- flour (beware of material build-up; we recommend feeding more slowly and distributing evenly over the entire grate area)

- poppy seeds (poppy seeds only, not whole poppy heads)

- ground corn

- meat and bone meal

- matcha powder

- pudding mix (bridging and clogging may occur; feed slowly and evenly across the entire magnetic grate)

- plastic granulate and regranulate

- plastic regrind

- ash (not hot, but cooled to the magnetic grate’s operating temperature)

- free-flowing, non-abrasive food mixtures

- powdered milk

- chocolate powder

- desiccated coconut

- dried herbs

- dried spices (finely ground or very finely crushed)

- dried instant soups

- dried whey (beware of material build-up; we recommend feeding more slowly and distributing evenly over the entire grate area)

- sesame seeds

- glaze, i.e., glass frit (we warn of increased abrasion and an increased risk of wearing through the protective tubes)

- salt (we warn of potentially shorter service life due to the material used; it depends on frequency of use)

- free-flowing starches, e.g., corn starch

- building materials (free-flowing and non-abrasive)

- tapioca pearls

We again emphasize that materials must be dry, free-flowing (must not tend to bridge), non-abrasive, with a maximum regular granulometry up to a diameter of 3 mm (3x3x3 mm). Throughput capacity varies depending on the material from which you require separation of ferromagnetic contaminants; it cannot be determined unambiguously and differs for each material type. If you are unsure about throughput/capacity flow, do not use this magnetic grate, contact our sales and technical department to recommend another type of magnetic separator or to approve 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 high pull-off force on its surface. Therefore, please also consider the height from which you will pour material onto the magnetic grate (impact height). The height from which material is poured onto the magnetic grate 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 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 grate is greater than 1 m, do not use this product and contact our sales and technical department to recommend another type of magnetic separator/grate or to approve the use of this type.

This magnetic grate captures (separates) ferromagnetic metal particles from a size of 1 µm and smaller (ferromagnetic in nature, unmeasurable magnetic dust) up to a size of 3 mm (3x3x3 mm), which is the maximum fraction (size) of material that may fall onto and be poured through the magnetic grate. In exceptional cases, the magnetic grate may also capture larger metal objects up to a size of 5 mm (5x5x5 mm). However, an incidental occurrence of these contaminants is assumed at max. 1% of the total hourly capacity of the material being poured (regular cleaning of the magnetic grate from ferromagnetic contaminants is assumed; this does not mean that the entire 1% of larger ferromagnetic contaminants can remain on the magnetic grate throughout the entire hour of throughput). The content of these larger ferromagnetic contaminants must not be higher. If the occurrence of these larger ferromagnetic contaminants in your material is higher, do not use this magnetic grate and contact our technical and sales department for professional advice.

No objects larger than stated (max. diameter 3 mm, 3x3x3 mm) may fall onto the magnetic grate, except for the incidental ferromagnetic contaminants described above. If you are concerned about the presence of larger ferromagnetic or other contaminants/foreign matter, a screen with a maximum mesh size of 3 mm must be installed upstream so that these larger unwanted objects are captured before entering the magnetic grate (after installing the screen, a reduction in the grate’s capacity/throughput should be considered). The screen is not part of the magnetic grate delivery. We also warn of the possibility that your material may contain a large amount of fine metallic contaminants (very fine magnetic metal dust smaller than 1 µm), which can coat the magnetic tubes and block the magnetic grate (fine magnetic particles also bind the poured material and overload the entire system). At the same time, the magnetic force/efficiency of the magnetic grate will be greatly reduced. If the magnetic tubes become coated immediately after starting material flow through the magnetic grate and are completely “hidden” in iron dust, this is not a defect of the magnetic grate; magnetic separation must be strengthened with an additional magnetic separator/grate or the magnetic grate must be cleaned more frequently—your material likely contains a very large amount of ferromagnetic particles. 

If you are not able to ensure:

- the absence of particles larger than 3 mm (3x3x3 mm) in your material

- less than 1% of larger ferromagnetic particles (up to 5 mm) in the hourly capacity

- minimal occurrence of fine metal dust in your material

do not use this magnetic grate and contact our sales and technical department to recommend another type of magnetic separator or to approve the use of this type.  

The magnetic grate is designed to capture as many ferromagnetic metal contaminants as possible. However, everything depends on the amount of these ferromagnetic contaminants present in your material. It is not possible to bindingly guarantee capture of all ferromagnetic contaminants. The specific process and capacities must always be considered. If necessary, additional types of magnetic separation/magnetic grates must be installed upstream or added. Please do not rely only on this single magnetic grate. If you are unsure, please do not use this type of magnetic grate and contact our magnetic separation experts at any time.

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

Do not use the magnetic grate to separate stainless steel (commonly referred to as “stainless”), even if it appears magnetic/paramagnetic (this can be the case, for example, after passing through various crushers or other forms of deformation; likewise, such paramagnetic stainless steels may be used to manufacture various screens). 

The magnetic grate is not intended for magnetic separation of non-ferrous, non-magnetic metals, nor for magnetic separation of parts or their components that contain ferromagnetic metals (e.g., plastic parts with embedded remnants of metal particles, shredded window frames with remnants of metal strips, wood pellets with pressed-in fine wires…). If you need to separate such ferromagnetic contaminants as well, do not use this magnetic grate and contact our magnetic separation experts, who will advise which other magnetic separator to use or what type to add to your separation setup.

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

Be very careful when cleaning the magnetic grate; the magnetic cores are very strong and attaching them to metal objects can cause injury by pinching or impact clamping. Do not place them on anything magnetic (tables, workbenches, stair treads, floors…).

This magnetic grate is not intended for use in any environment classified as an explosive atmosphere (ATEX).

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

Magnetic induction measurement procedure

Measurements are performed using a standard gaussmeter with a probe thickness of 0.75 mm at the point of the highest structurally available magnetic induction—at the pole pieces, i.e., at the lowest point of the magnetic circuit arc. We repeat the test 3 times, each time at a different point of the magnetic circuit, and calculate the average magnetic induction.

Pull-off force measurement procedure

We measure using a polished steel reference standard with a diameter of 10 mm and a height of 20 mm. Measurements are performed at the point of the highest structurally available pull-off force—at the pole pieces, i.e., at the lowest point of the magnetic circuit arc. We record the force at which the reference 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 the measurement and a guarantee of the measured values, we issue an original measurement report for your specific magnetic rod (the report includes the stock and production number), and it is included with the delivery of each magnetic separator.

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 impaired functionality of the device or a shortened service life. In such a case, consultation with the manufacturer is necessary to clarify to what extent the device can be exposed to higher temperatures without damage while maintaining safe operation.

WARNING: 

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

Copyright:

We do not agree, we do not wish, and we hereby grant no one any permission to copy individual parts or the entire text. Rewriting the text using identical phrases with resulting similarity in meaning and correspondence with our text is also prohibited. We do not wish and do not agree with any placement of our text anywhere on other websites, in professional journals, studies, or final theses at secondary schools and universities without prior consent of the company Magsy. If you wish to use our text or parts thereof, please contact us at any time.