Lifting electromagnets are frequently working with various industrial overhead cranes to provide an ideal material handling solution for ferrous materials such as steel and iron of various weights, sizes, and temperatures in different industrial sectors, such as,  ship manufacturing, heavy machinery, steel warehouses, ports, and railways field, etc. They are obviously usefully in metal processing industries and steel products distributing centers for handling cast ingot, steel ball, pig iron, machine chip,billet, ingot, steel coils, pipe, rebars, wires, tubes, and, others  etc. What;s more, the lifting magnetic lifters also can be used to handle various types of steel scraps, return scraps, cropping, baling scraps, and so on in foundry factories and iron powder in coal washeries. At the beginning of the slag disposal process, it can remove considerable amounts of iron. It is suitable for usage in the waste steel recovery department and the steelmaking workshop.

Difference in magnet working principles

Because of their magnetic gripping force or capacity, crane magnets are used in industrial lifting applications to attract steel material or parts. The generation of lifting magnetic force varies depending on the magnet type.

In conclusion,an electromagnet needs a power supply, and there are many potential safety risks. A permanent magnet, on the other hand, is always active and doesn't need a power supply. However, because the energy in electromagnets is driven by a power source, they are frequently stronger than permanent magnets. Electricity is only needed to activate and deactivate electro-permanent lifters. Additionally, they won't utilize electricity while using the lift. Therefore, compared to electro lifters, electro-permanent lifters are more energy-efficient. That's to say,  each form of lifting magnet has advantages and disadvantages. We can select a more suitable magnetic lifter to suit the loads and working circumstances by being aware of their relative benefits and drawbacks.

All new, updated, or refurbished lifting devices shall undergo a rated load test and a functioning test performed by a trained examiner prior to beginning use. Make sure your lifting magnets are in good working order. Manufacturers are required to conduct this test and give written certification or video documentation of the results.

Visual examination

The following magnetic lifters must be visually inspected by the user before each use:

• The lifter must be free of any metal attachments and have no attracting force in the OFF position.
• The bottom should have a flat surface.
• The top hoist ring needs to be in good shape.
• Verify the safety latch and handle for smooth functioning.
• Confirm that the safety label that is attached can be read.
• Additionally, you should inspect each component for signs of wear, corrosion, or deformation.

Before its initial hoisting, it is required to adhere to the inspection guidelines to the letter. Make sure they are all functioning properly, especially if they have integrated emergency warning signs.

Breakaway test

When it comes to magnets, damage to the magnetic material inside the object is not visible from the outside. The breakaway test verifies the magnet's present lifting capacity. For a particular test plate, the test shows the force that the magnet released. The breakaway force is affected by a load's mass, composition, flatness, and smoothness. It enables the user to determine whether the magnet satisfies the manufacturer's specified rated capacity.

Operators must have a complete understanding of the loads before lifting.

Load tests are performed as a final step before the lifting magnet is approved for operation. The load test assures their safe operation, that the structure can withstand the loads it was planned for, and that your equipment is safe.

High-quality lifting magnet

These tests are critical to the safe operation of equipment, and our factory will not allow the lifting magnets to be used until they have been done on the equipment that we have installed.

The industrial lift magnet is used in a variety of industries, including metalworking, machinery, steel fabrication, shipbuilding, industrial automation, foundries, warehouses, etc. To insure your safety, the following safety tips are for your reference.

Safety precautions that industrial lift magnet features:

• A. Our electro-permanent magnet has a rated lifting force and a magnetic pull force. To ensure that the adsorbed object does not slip off during the lifting operation, the magnetic draw force is typically 2-4 times the lifting force. That means, our magnet has a safety factor of 3:1. If you have a 100KG ferrous workpiece to handle with our magnet, the lifting capacity of the magnet will be 100 kilogram. And you'll have to employ 300KG of force to get the workpiece off.
• B. Pre-magnetization is sufficient to lift the object, and full magnetization is required to transfer the object. Pre-magnetization is typically 80% of the magnetic force, with an additional 20% to ensure material handling safety.
• C. Some clients may have a question: if the operator accidentally clicks the "DEMAG" button during the handling procedure, will the raised object fall from the air? Our factory takes two precautions here: 1. Press two buttons at the same time to demagnetize the magnet. 2. Our lifting magnets feature a landing sensor (as seen in the above image) that detects whether or not the metal workpiece falls on the ground. Even if both buttons are pressed, demagnetizing will not work if no landing is detected.
• D. The final safety precaution is inherent in its properties: an electro-permanent magnet does not lose magnetism in the event of a power outage. So, even if the ferrous material is suspended in the air, the workpiece will not fall off and injure employees or equipment in the event of a power outage or voltage instability. Because magnetization takes only 2 seconds with a single pulse of electric current. It also requires no electricity when working.

Accidents can occur at any point in routine production. Operators must adhere to strict safety regulations when utilizing the electro-permanent magnet in order to eliminate safety hazards in the handling of heavy steel loads.

Operation rules or reminders for lifting magnets:

• Before each use, inspect the magnet visually. We must determine whether the magnet appears to be in good condition from the outside. Then we check to see if the controller parameters are properly adjusted, the wire is properly connected, and the magnetization and demagnetization are normal.
• Before using the magnet, the operator must read the instruction handbook. They should also be confident in their fundamental safety understanding. Any staff who is not authorized should not operate the magnet.
• Keep an eye on the load and avoid handling loads that exceed the lifting capacity of the lifting magnet. The capacity of the lifting magnet can be modified based on your load handling requirements.
• Keep an eye on the working temperature. Magnets can sometimes be custom-made to meet your precise temperature requirements. Use the magnet within the temperature range allowed, because the greater the temperature, the faster the magnetic force decays.
• Avoid any kind of collision or vibration during operation.
• Attempt to keep the load balanced and the weight equally distributed under the magnet.
• Ensure that the load and the magnet are fully in contact, and do not magnetize the magnet before this.

Lifting magnets are currently frequently used in automatic production lines for lifting and handling steel plates, pipes, coils, and ferromagnetic materials. Companies place a high value on safety in structural steel fabrication, construction machinery production, shipbuilding, and logistics. There are some additional instructions, reminders, and tips on how to use lifting magnets successfully. They are all aimed toward increasing your profits.

While magnetic lifting systems are regarded one of the safest means of lifting, there is always the possibility of a power failure during lifting. Is lifting magnets safe even if the electricity goes out? How long can your lifting magnets withstand a power outage?

There are three sorts of magnetic lifters, as we all know: electromagnets, permanent magnets, and electro-permanent magnets. What about their tenacity?

Permanent magnets:

As the name implies, permanent magnets do not require electricity and transport items using the magnetism of the poles, preventing unexpected accidents. The magnetic force steadily lessens as use increases, and unloading becomes slower.

Electromagnets:

In general, manufacturers will make extensive use of battery systems. When the power is unexpectedly cut when lifting workpieces, the electromagnetic system will instantly start the backup power supply to provide energy and keep the items in the absorption state.

Electromagnets can lose strength if coils burn out due to overheating (limit of 15 minutes) or rectifier sections fail. If an electromagnet abruptly ceases working, safety problems have most certainly arisen in that workplace.

Electro-permanent magnets:

Electro-permanent magnets consume less energy than typical magnetic lifers, have a strong and stable magnetic force, and are safe. The electro-permanent magnets are only energized when picked up and placed. There is no need for electricity during transportation, which drastically saves energy usage and eliminates the possibility of products failing.

Magnets simplify material handling operation. Lifting magnets improve efficiency in numerous situations. To ensure safety, proper attention must be paid to the backup power source. Ensure that everyone in the institution understands what to do in the event of an accident.

Electro-permanent lifting magnets have gained popularity among machinery makers, steel mills, foundries, metalworking factories, shipyards, and steel wholesalers. The maintenance process is not difficult, and the cost is quite inexpensive, which is a major factor. Your lifting magnets can have a longer lifespan and higher operational efficiency with routine maintenance.

Please make sure the following before any maintenance or repairs:

•  The lifting magnet can only be maintained and repaired by qualified personnel.
•  Before handling or removing components, turn off the circuit breaker located at the back of the magnet.
• Do not smoke in the area of the magnet.
• If the lifting magnet is battery-operated, make sure it is not charging.

1. Advice for maintaining your lifting magnet's mechanical components:

• A. Daily inspection before each use, including the housing and magnet surface look, cleanliness, and the condition of all welds, power wires, screws, chains, and rings, among other things.
• B. Inspect the appearance for any cracks or obvious stains. Verify the chains and rings to see if anything is hanging loose. On the magnet surface or the housing, are there any dings or signs of excessive wear?

2. Tips on maintaining electronic components of your lifting magnet:

• A. Proper storage is required. An anti-flammable, explosion-proof, dust-proof, and anti-strong magnetic field should surround the storage area. It is best to place the controller in a well-ventilated area without allowing liquid or metal particles to get inside.
• B. Avoid collisions or falling.
• C. Electrical equipment maintenance and repair must adhere to all applicable laws and technical guidelines.
• D. It is advised that the user perform routine checks of the magnet's buttons, indications, terminals, and power cords. If you use the magnet every day at work, check the resistance value and insulation value once every six months.

No, it will not. Our lifting equipment's magnetic force is activated and deactivated by a brief electric pulse. Once magnetized, the lifting force is permanent unless the current is turned off again. That means, our lifting magnets need no power during the lift and can continue to retain the load even if the electricity goes off.

What benefits do electro permanent magnet lifters have over permanent magnet lifters and electromagnetic lifters?

The magnetic flux penetration of EPM magnets can be adjusted according to the thickness of steel plates, ensuring that one plate is lifted each time without picking up the second. Energy efficiency, safety and durability, and ease of use are all advantages.

Can your lifting magnets lift multiple plates at once?

Yes, the number of plates to be lifted varies according to thickness, weight, and your individual operating conditions. We can design a magnetic lifting system specifically for your purpose.

Do you provide an electric hoist and a lifting beam?

We do provide electric hoists and overhead cranes, and below-the-hook overhead crane lifting magnets. In terms of the lifting beam, we can make it for you along with magnet lifters, or you can make it yourself to save money on transportation.

Is it possible for your magnetic lifting equipment to handle stainless steel materials or products?

No, our magnet lifting is not ideal for stainless steel parts; it is only suitable for ferrous objects with good magnetic conductivity.

What is the thinnest steel sheet your magnet lifting system can pick up?

Our lifting magnets can lift sheets as thin as 2mm, lifting one sheet at a time without picking up a second or multiple sheets. You can tell us about your handling needs, such as the thickness and number of sheets to be handled. We can design a magnetic lifting system specifically for your purpose.

How to select from Vacuum lifting systems to Magnet Lifting System for thin steel sheets handling?

Vacuum lifters are cheaper than our magnetic lifting method, but they are also more prone to damage, less safe than magnet lifters, and require more frequent maintenance. When using magnet lifters, there won't be any load slippage or drops because the magnetic force of these lifters can continue even if the power source is abruptly cut off.

To cater to different needs, the tailored lifting magnet needs to be customized based on lifting needs and applications. And the following questions will help you to customized the lifting magnets for your application?

What and how much weight are you lifting?

The first thing we need to consider when deciding on a lifting magnet is: what and how much are you going to lift?

• The material you are lifting must first be familiar to you. Only ferrous materials can be raised by lifting magnets.
• The quantity and size of magnets required depend on the material types, sizes, and temperatures, etc.
• Safety is our top concern. To ensure that we can safely lift the handling material, we must use the magnet's maximum lifting capacity.
• Additionally, the material's weight indicates your working load. And the thickness will determine if your magnet can safely lift the fabric with a strong force.

What parameters required to provide to get custom magnet lifting?

• For handle plates, we need to know the length, width, thickness, and material type;
• for steel pipes and tubes, we need to know the diameter, wall thickness, length, and weight;
• and for particularly complex items, additional drawings or photographs will be necessary.
• For the customization of the magnet lifting system, other details such as whether the lifting process is handled automatically or manually, inside the home or outside, the types of crane, the maximum hoisting weight and height of the crane, etc., may also be required.

Contact us to get a custom lifting magnet for your industrial hoist and crane today!