Lifting Electromagnets used to lift attached materials are a kind of special equipment which utilizes the electric &magnetic physical quantity. Lifting electromagnets are indispensable for lifting and transporting ferromagnetic materials in line of metallurgy, mine, machinery, shipbuilding and transportation etc. sometimes we also call them circular lifting electromagnets or scrap lifting electromagnets.
• Permanent, circular, highly efficient, long servicing life, and handling is super strong
• High magnetic force, high lifting capacity, light self weight, and simple structure reliability
• better moisture resistance, good wear-resistance and heat-proof performance
• fine insulation structure, low power consumption, wide usage and is very safe
• Special magnetic circuit design has large air space and magnetism density
• Specially processed energizing coils improve the electrical and mechanical properties
• With a unique way of insulation expanding application range of the electromagnet
• Flexible and optional--a complete set of electric control device can change by request
• Smart and convenient--be able to be used by remote control and wireless
• Wide usage for matching, mould making, dockyard, steel structure plant, warehouse
• Omnipotent---suitable for working with all kinds of lifting equipment
• With simple and convenient installation, operation and maintenance
• Increased rated power-on sustaining rate improve the efficiency of the electromagnet
• Coil protection plate adopts abrasion-resisting and shockproof rolling high-Mn steel
• High temperature type electromagnet adopts unique method of heat protection
• time and effort saving-be able to lift steel more quickly and conveniently than other devices
• Lifting capacity can be further improved by switching to over excitation control mode
Diameter 700-2400 mm
Surface 100% Leak Proof
Material Stainless steel, casting steel
Certificate ISO9001:2008
Factory inspection Available
Structure Welded and combined chain
Standard or nonstandard Standard
Delivery By sea and by air
Size Standard size and others are required
Application Load lifting, lashing, pulling and dragging
Safety factor 4:1
HS code 73269090
Packing Fixed iron frame with five-plywood board packing
shape Circular Lifting Handling Equipment
Application Suitable for lifting steel scrap, ingots and steel ball
Available OEM & ODM
After-sale service provided Engineers available to service machinery overseas
They are also called electro permanent magnetic lifters,Electromagnetic chuck,industrial lifting magnets electromagnets, hydraulic grab electromagnetic circular lifting, electromagnet circular lifting magnets, industrial electromagnet lifting scrap iron, electromagnet lifting scrap metal, Circular scrap lifting electromagnet, Circular lifting magnet, Steel scrap and steel plate lifting handling equipment, Wire rod lifting electromagnet, Mine high quality electric magnet, Electromagnetic chuck, Lifting magnet for lifting scrap, Scrap electromagnetic magnet lifter, Electromagnetic lifter, Electromagnetic lifting magnets, Lifting steel scraps on crane, lifter magnet.
2.Magnetic Coil
3. Contro l Cabinet (Rectifier Cabinet or Battery Back-up Cabinet)
A control cabinet working with lifting electromagnets mainly consists of automatic air-switch, transformer, 3 phases bridge rectifying components, DC contactor and so on. In case of short circuit and over voltage, the electrical circuit has protection measures.
During work, two things should be noted. First, the lifting electromagnets’ rated voltage must be in accordance with the out put voltage of the control cabinet. Besides, the electromagnets’ current must be less than or equal to the rated current of the control cabinet.
4. Cable Reel (with cable) | Cable Drum
A cable reel is a round, drum-shaped object such as a spool used to carry various types of electrical wires.
Cable reel which can also be termed as drums have been used for many years to transport electric cables, fiber optic cables and wire products. Cable reels usually come in four different types, each with their own uses: wood, plywood, plastic and steel.
To ensure the cable reel works normally with the lifting electromagnets, regular maintenance is required. We should regularly float the ash, contamination, oil, etc on the surface of cable reel to keep it clean and dry. Besides, we must periodically check whether the install reel and other parts of the fastener are loose, and any loose part needs to be tightened immediately.
5. Cable
6. Cable Connector | DC Connector
A cable connector, also known as cable gland or cable fitting, is a device designed to attach and secure the end of an electrical cable to the equipment. Unlike electrical connectors, cable connectors connect wires to devices mechanically rather than electrically. They are used throughout a number of industries in conjunction with cable and wiring used in electrical instrumentation and automation systems. Used as a sealing and termination device, they can ensure that the characteristics of the enclosure which the cable enters can be maintained adequately.
Cable connectors are made of various plastics, steel, brass or aluminum.
7. Hook
Hooks are needed to connect, for example, the excavator and the electromagnet.
8. Lifting Beam
Lifting beams are one of the most common lifting devices for material handling. Lifting beams are typically made from a beam and have a single top lifting point with multiple bottom lift points. The bottom lift points enable the user to specify exact lengths when rigging on standard or precision lifts.
9. Wireless Remote Control
Wireless remote controls enable operators to manipulate the equipment from a long distance, which is convenient and safe.
10. Chain
A chain is a serial assembly of collected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression but linear, rigid, and load-bearing in tension. A chain may consist of two or more links. Chains used to lift a magnet panel must be strong enough to keep safe transportation.
11. Iron Core
An electromagnet is a type of man-made magnet. Though it is made out of materials that are not themselves magnetic, when power is applied to its circuit, it acts just like a natural magnet, except it can be turned on and off. An electromagnet is essentially just a battery attached to a coil of wire wrapped around a metal core. The metal most often used for this is iron.
12. Aluminum Coil
The coil wrapping around a iron coil is usually made from aluminum.
13. Mica Sheet
Micas are fairly light and relatively soft, and the sheets and flakes of mica are flexible. Mica is heat-resistant and does not conduct electricity.
14. Steel Plate
Steel plate is a material often used to create metal products.
15. Carbon Steel
Carbon steel is a steel with carbon content up to 2.1% by weight.
16. Insulatiing resin
17.other parts
Others
1.Warranty
There is usually one-year warranty.
2.Delivery package and transportation
The delivery package usually adopts standard export package (fixed iron frame with five-plywood board packing to keep safety and long-distance transportation). All available shipping ways could be applied, by courier, air or sea. Usually the lead time is 7-25 days.
3.Pre-sales service
Based on buyer’s request, all technical proposal will be offered by senior engineers. Besides, full production process will be shown to buyer by photos & video during manufacturing.
4.After-sales service
After-sales service and technical support could be offered within guarantee period. Site maintenance could be also provided. Also, engineers are available to service machinery overseas.
5.Partial testing for lifting electromagnets before delivery
(1) Pressure testing at 2000V, 50 HZ.
(2) Inter turn testing at 550V.
(3) DC resistance testing.
(4) Insulation resistance testing.
(5) Electric clearance testing.
(6) Creep distance testing.
(7) Lifting capacity testing.
(8) Control cabinet testing.
(9) Other testing for magnet size & appearance.
6. Three types for option
--Normal temperature type (DC-220V TD-60%)
--High frequency type (DC-220V TD-75%)
--High temperature type (DC-220V TD-60%)
7. Cautions
① Material surface & Safe lifting conditions
Lifting ferrous items using a magnet requires a good look at the length, width and thickness of the item. Thin metals do not absorb as many of the magnetic flux lines (magnetic energy) as thicker metals. Thin metals also flex, causing the steel to peel-off the magnet. Equally important is the physical size, flatness, surface conditions and type of steel. The charts below illustrate how surface finish and Carbon content effect lifting value.
Percentage Of Stated Lifting Power By Surface Finish
SURFACE FINISH | Ground Surface | 100% |
Rough Machined | 100% | |
Foundry Finish | 85% | |
Rough Cast | 65% |
Percentage Of Stated Lifting Power By Material
CARBON CONTENT | Low Carbon 0.05-0.29% | 100% |
Moderate Carbon 0.30-0.59% | 85% | |
High Carbon 0.60-0.99% | 75% | |
Higher Carbon=Higher Residual* | 0% |
*High Carbon steel (Tool Steel) will absorb magnetism and may magnetically stick to steel surface, such as the magnet or attract ferrous particles.
② Lifting angle relation to lifting force
Maximum lift force achieved by lifting electromagnets is when the direction of force is perpendicular (90°) to the metal surface. If a load is tipped at an angle, shear forces, slide forces, friction, peeling forces associated with movement or impact forces from bumping the load as it is conveyed can cause the lift to fail.
▪ Check magnet/load balance by raising the load off the ground by 2″-3″only.
▪ Reposition the magnet until the load is level.
▪ Never lift a load at an angle in excess of 5°from horizontal.
③ Loss of magnetism
Under normal use conditions, a lifting electromagnet can experience a decrease in its original holding value. The most common factors which can cause a loss of strength include:
▪ Every day wear and tear on the magnet face such as: fine metal buildup on or between the magnet’s poles, nicks or gouges in the magnet’s poles, rust buildup, etc.
▪ Exposure to extreme temperatures.
▪ Severe blow or shock to the magnet. Do not use a blunt instrument to position the magnet on the load.
▪ Exposure to currents. Never place magnet next to a large motor or generator. Never use the magnet as part of a welding ground circuit.
▪ Exposure to vibration.
④Proper placement of magnets
DETERMING LAYOUT
The lifting electromagnets need to deal with steel sheets, containers, tubing, I-beams, well drilling pipe and more that can be just about any length, width and thickness. Sometimes the part needs to be rotated 90°or 180°. What all this means is more than one magnet attached to a spreader system may be needed to improve your part. See examples below.
The lift magnet may require custom magnetic pole shoes to adequately lift the part if your part is not a sheet or plate and it has peaks, valleys, ridges, etc. Customizing the face of the magnet to conform to the surface condition of the part ensures good contact between the two and most, if not all, magnetic strength will flow into the part to be lifted.
⑤ Magnet maintenance and care
A lifting electromagnet, like any other tool, needs to be kept in good working order. Maintaining your lift magnet can only assist in a safe lift condition.
▪ Occasionally check the mechanical operation of the magnet release handle, spring, grip, as well as the lift lug for damage or fatigue.
▪ Keep the surface (magnetic face) of the lift free of chips, slag, weld beads, dirt, rust, etc. This can be done by wiping the surface of the magnet off frequently with a wire brush, shop rag or gloved hand.
▪ Apply oil or grease to magnetic face pole surfaces if magnet is to be stored for long periods of time.
▪ After a period of time the magnet face poles may become somewhat rounded, nicked, or gouged, reducing the magnet’s effectiveness. Magnetic pole faces can be machined or ground to bring the magnet back to a consistent flat surface. Calibration tests can determine current magnetic strength of the lifter.
▪ Do not weld on, hammer, throw or drop the magnet.
▪ Do not strike, slam, ram or forcefully impact the magnet against other objects.
▪ Lift magnets are designed to be used in dry applications. Never use magnet under water without consulting the manufacturer.
▪ Always store the magnet in a non-conductive, dry environment.
⑥Magnet calibration
An annual calibration test is recommended to ensure that your lifting electromagnet is performing to its optimal level. Calibration of a lift magnet is a test, performed by an approved testing facility that determines the current lift capacity of the magnet, at the time of the test.
Under an “Ideal Condition” environment, a series of break-a-way tests will determine the current “de-rated” holding value of your magnet. This holding value must meet or exceed the value stated on your lift magnet. If the stated holding value is met, the magnet can be returned to use and scheduled for another calibration test in one year. The outcome of the test allows the operator/owner of the lift to know that the magnet meets the lift standards as designed by the manufacturer.
If the stated holding value is not met, the lifting electromagnets can possibly be machined to bring all magnet face poles back to a smooth, level condition. If that does not bring the magnet back to the manufactured lifting value, the magnet should be removed from operation and replaced with another magnet.
A CERTIFICATE OF CALIBRATION, given at the conclusion of the testing, gives the operator/owner documentation of the magnet’s performance.
Specifications
Type | Model | Diameter (mm) | Current (A) | Power (Kw) | Lifting Capacity (KG) | Weight (KG) | ||
Steel Ball | Steel Ingot | Steel Scrap | ||||||
Normal Temperature Type (DC-220V TD-60%) | LE70L/1 | 700 | 15 | 3.3 | 2500 | 380/200 | 120/100 | 490 |
LE80L/1 | 800 | 18 | 3.96 | 3000 | 480/250 | 150/130 | 620 | |
LE90L/1 | 900 | 26.6 | 5.9 | 4500 | 650/440 | 250/200 | 800 | |
LE110L/1 | 1100 | 35 | 7.7 | 6500 | 1000/800 | 450/400 | 1350 | |
LE120L/1 | 1200 | 45.5 | 10 | 7500 | 1300/1000 | 600/500 | 1700 | |
LE130L/1 | 1300 | 54 | 12 | 8500 | 1400/1100 | 700/600 | 2010 | |
LE150L/1 | 1500 | 71.2 | 15.6 | 11000 | 1900/1500 | 1100/900 | 2830 | |
LE165L/1 | 1650 | 75 | 16.5 | 12500 | 2300/1800 | 1300/1100 | 3200 | |
LE180L/1 | 1800 | 102 | 22.5 | 14500 | 2750/2100 | 1600/1350 | 4230 | |
LE210L/1 | 2100 | 129 | 28.4 | 21000 | 3500/2800 | 2200/1850 | 7000 | |
LE240L/1 | 2400 | 154 | 33.9 | 28000 | 4800/3800 | 2850/2250 | 9000 | |
High Frequency Type (DC-220V TD-75%) | LE110L/1-75 | 1100 | 27.6 | 6.07 | 6500 | 1000/800 | 450/400 | 1500 |
LE130L/1-75 | 1300 | 40.7 | 8.95 | 8500 | 1400/1100 | 700/600 | 2280 | |
LE150L/1-75 | 1500 | 51.4 | 11.3 | 11000 | 1900/1500 | 1100/900 | 3175 | |
LE165L/1-75 | 1650 | 55.6 | 12.2 | 12500 | 2300/1800 | 1300/1100 | 3840 | |
LE180L/1-75 | 1800 | 73.9 | 16.3 | 14500 | 2750/2100 | 1600/1350 | 4690 | |
LE210L/1-75 | 2100 | 98.5 | 21.7 | 21000 | 3500/2800 | 2200/1850 | 7810 | |
LE240L/1-75 | 2400 | 117.6 | 25.9 | 26000 | 4800/3800 | 2850/2250 | 10115 | |
LE250L/1-75 | 2500 | 185 | 40.3 | \ | 5600/4500 | 3500/2650 | 11100 | |
High Temperature Type (DC-220V TD-60%) | LE70L/2 | 700 | 12.77 | 2.81 | 2500 | 380/200 | 120/100 | 520 |
LE80L/2 | 800 | 16.1 | 3.54 | 3000 | 400/250 | 150/130 | 650 | |
LE90L/2 | 900 | 20.5 | 4.51 | 4500 | 600/400 | 250/200 | 900 | |
LE110L/2 | 1100 | 27.5 | 6.05 | 6500 | 1000/800 | 450/400 | 1500 | |
LE130L/2 | 1300 | 40.6 | 8.93 | 8500 | 1400/1100 | 700/600 | 2300 | |
LE150L/2 | 1500 | 51.4 | 11.3 | 11000 | 1900/1500 | 1100/900 | 3200 | |
LE165L/2 | 1650 | 60.6 | 13.3 | 12500 | 2300/1800 | 1300/1100 | 3500 | |
LE180L/2 | 1800 | 73.8 | 16.2 | 14500 | 2750/2100 | 1600/1350 | 4530 | |
LE210L/2 | 2100 | 98.5 | 21.7 | 21000 | 3500/2800 | 2200/1850 | 7410 | |
LE240L/2 | 2400 | 111 | 24.4 | \ | 4800/3800 | 2850/2250 | 9830 |
Dimensions (mm)
Type | Model | A | B | C | D | E | ||
Normal Temperature Type (DC-220V TD-60%) | LE70L/1 | 700 | 800 | 160 | 90 | 30 | ||
LE80L/1 | 800 | 800 | 160 | 90 | 30 | |||
LE90L/1 | 900 | 1090 | 200 | 125 | 40 | |||
LE110L/1 | 1100 | 1140 | 220 | 150 | 45 | |||
LE120L/1 | 1200 | 1180 | 220 | 150 | 45 | |||
LE130L/1 | 1300 | 1240 | 250 | 175 | 50 | |||
LE150L/1 | 1500 | 1250 | 350 | 210 | 60 | |||
LE165L/1 | 1650 | 1590 | 370 | 230 | 75 | |||
LE180L/1 | 1800 | 1490 | 370 | 230 | 75 | |||
LE210L/1 | 2100 | 1860 | 400 | 250 | 80 | |||
LE240L/1 | 2400 | 2020 | 450 | 280 | 90 | |||
High Frequency Type (DC-220V TD-75%) | LE110L/1-75 | 1100 | 1270 | 220 | 150 | 45 | ||
LE130L/1-75 | 1300 | 1290 | 250 | 175 | 50 | |||
LE150L/1-75 | 1500 | 1360 | 350 | 210 | 60 | |||
LE165L/1-75 | 1650 | 1690 | 370 | 230 | 75 | |||
LE180L/1-75 | 1800 | 1650 | 370 | 230 | 75 | |||
LE210L/1-75 | 2100 | 1900 | 400 | 250 | 80 | |||
LE240L/1-75 | 2400 | 2100 | 450 | 280 | 90 | |||
LE250L/1-75 | 2500 | 2260 | 450 | 280 | 90 | |||
High Temperature Type (DC-220V TD-60%) | LE70L/2 | 700 | 824 | 160 | 90 | 30 | ||
LE80L/2 | 800 | 824 | 160 | 90 | 30 | |||
LE90L/2 | 900 | 1115 | 200 | 125 | 40 | |||
LE110L/2 | 1100 | 1350 | 220 | 150 | 45 | |||
LE130L/2 | 1300 | 1280 | 250 | 175 | 50 | |||
LE150L/2 | 1500 | 1360 | 350 | 210 | 60 | |||
LE165L/2 | 1650 | 1690 | 370 | 230 | 75 | |||
LE180L/2 | 1800 | 1650 | 370 | 230 | 75 | |||
LE210L/2 | 2100 | 1912 | 400 | 250 | 80 | |||
LE240L/2 | 2400 | 2080 | 450 | 280 | 90 |