Electromagnetic Vibrating Feeder

What is an electromagnetic vibrating feeder?

Electromagnetic vibrating feeder is a device used to precisely control the flow rate of granular materials. It operates on the principle of electromagnetic vibration, where an alternating current passes through a coil, creating a magnetic field that attracts and releases a magnetic plate. This periodic attraction and release generates a linear vibration, causing the material on the feeder tray to move forward in a controlled manner.

In our actual production experience, the key to achieving stable feeding with this principle lies in the precise tuning of the electromagnetic coil gap. A gap that is too large reduces amplitude; too small causes overheating. Our standard factory calibration ensures optimal performance across all 11 models.

Our feeders are available in ten different models with capacities ranging from 25 to 100 tons per hour. They are available in SS 304/316L or mild steel. The chutes vibrate at 3000 times per minute and are able to handle a wide range of materials from the finest powders to large coarse particles.

Types of electromagnetic vibrating feeder

1.Different materials

Carbon steel: Q235 carbon steel trough is used, which is suitable for customers with low hygiene requirements, and the price is cheap.

Stainless steel: It is made of SUS304 stainless steel trough, which is resistant to corrosion, high temperature, not easy to rust, and can avoid the pollution of raw materials.

Selection tip: Choose carbon steel for general-purpose applications where budget is a priority. Choose SS304 for food/pharmaceutical applications; choose SS316L for highly corrosive or high-temperature environments.

2.Different structure

Open type: It is a common structure. Suitable for material feeding without special requirements.

Enclosed type: Enclosed electromagnetic vibrating feeder adopts closed body design, which can prevent dust pollution. It is suitable for feeding materials with fragile particles, large dust and easy volatilization.

Selection tip: Open type is sufficient for most dry material applications. Choose enclosed type when handling fine powders (e.g., cement, lime) or volatile materials to meet environmental and safety regulations.

3. Different installation method

Seat type: Under normal conditions, it can be installed with a downward tilt of 10°. For materials with high viscosity or high water content or fine powder, it can be installed with a downward tilt of 15°.

Hanging type: Hanging type installation, the body performs periodic linear reciprocating motion along the groove direction to achieve uniform and quantitative feeding. After installation, the feeder should have a 20mm swimming gap, and the horizontal direction should be horizontal. The suspension device adopts flexible connection .

Installation note: For materials with moisture >15% or fine powder <200 mesh, we recommend the 15° downward tilt to prevent bridging and ensure consistent flow.

4. Different  trough:

Light groove type: suitable for feeding light materials with small specific gravity.

Flat groove type: suitable for uniform feeding of thin material layers.

Wide groove type: The double vibrating head design is adopted, which widens the width of the groove body, increases the particle size of the receiving material, and at the same time increases the feeding amount, which can send the entire receiving device (such as a belt conveyor or a crusher) to the whole receiving device. Cross-section uniform cloth. Mainly used for coal preparation, and can also be used to feed the screening equipment.

Selection tip: Wide groove with dual vibrator head is specifically designed for coal preparation plants where uniform distribution across the entire width of a belt conveyor or crusher feed opening is critical.

Working Principle & Key Technical Parameters

The working principle is based on electromagnetic vibration technology. When alternating current passes through the electromagnetic coil, it generates a rapidly changing magnetic field. This magnetic field attracts and releases the armature at high frequency, causing the feeder trough to vibrate continuously. The vibration force drives bulk materials to move forward along the trough in a stable and controlled flow. Because of its precise feeding capability, the Electromagnetic Vibrating Feeder is used in industries such as mining, metallurgy, coal processing。

Key technical parameters that affect performance:

Amplitude (1.5-3mm): Determines the conveying speed. Higher amplitude = faster feeding.

Frequency (3000 times/min): Fixed at 50/60Hz line frequency. This high frequency creates a “micro-throw” effect that minimizes trough wear.

Control method: Thyristor half-wave rectifier allows continuous stepless speed adjustment from 0 to 100%.

Video

Features and Benefits

Key Benefits for Your Production Line:

Precise batching accuracy – ±2% feeding accuracy reduces material waste and improves product quality consistency

Low maintenance cost – The resonance principle minimizes trough wear; our customers report 3-5 years of trough life under normal operation

Energy efficient – Dual-mass resonance design consumes less power than mechanical feeders of equivalent capacity

Instant start/stop – No motor startup delay; feeding can be stopped immediately for emergency situations

The Electromagnetic Vibrating Feeder exhibits stable vibration parameters during material conveying, with an amplitude typically ranging from 1.5 to 3 mm and a vibration frequency reaching approximately 3000 times per minute. During operation, the material flow rate can be turned on, off, or adjusted via the control system, thereby altering the feeding speed. The controller employs a thyristor half-wave rectifier circuit, allowing for continuous adjustment of the feeding rate by regulating the thyristor opening angle during operation, facilitating unified management of the production line. The material, subjected to vibration within the feeding trough, is continuously thrown up and moves forward along a parabolic trajectory. This motion reduces wear on the trough surface, lowering maintenance and replacement costs. Utilizing the principle of mechanical vibration resonance, the dual-mass structure operates near resonance, finding applications in material conveying equipment, such as in the mining and building materials industries.

Technical parameters

Types of	Model	Productivity(t/h)		Feed particle sizemm	Double amplitudemm	Voltage(V)	Current(A)		Power(Kw)	Matching control box
		level	-10 degrees				Working current	Indicates current
Basic	GZ1	5	7	50	1.75	220	1.34	1	0.06	XKZ-5G2
	GZ2	10	14	50			3.0	2.3	0.15
	GZ3	25	35	75			4.58	3.8	0.2
	GZ4	50	70	100			8.4	7	0.45	XKZ-20G2
	GZ5	100	140	150			12.7	10.6	0.65
	GZ6	150	210	200	1.5	380	16.4	13.3	1.2	XKZ-20G3
	GZ7	250	350	250			24.6	20	3
	GZ8	400	560	300			39.4	32	4
	GZ9	600	840	350			47.6	38.6	5.5	XKZ-200G3
	GZ10	750	1050	500			39.4*2	32*2	4*2	XKZS-200G3
	GZ11	1000	1400	500			47.6*2	38.6*2	5.5*2
Up mode	GZ3S	25	35	75	1.75	220	4.58	3.8	0.2	XKZ-5G2
	GZ4S	50	70	100			8.4	7	0.45	XKZ-20G2
	GZ5S	100	140	150			12.7	10.6	0.65
	GZ6S	150	210	200	1.5	380	16.4	13.3	1.5	XKZ-20G3
	GZ7S	250	350	250			24.6	0	3	XKZ-100G3
	GZ8S	400	560	300			39.4	32	4
Closed	GZ1F	4	5.6	40	1.75	220	1.34	1	0.06	XKZ-5G2
	GZ2F	8	11.2	40			3	2.3	0.15
	GZ3F	20	28	60			4.58	3.8	0.2
	GZ4F	40	56	60			8.4	7	0.45	XKZ-20G2
	GZ5F	80	112	80			12.7	10.6	0.65
	GZ6F	120	168	80	1.5	380	16.4	13.3	1.5	XKZ-20G3
light groove	GZ5Q	100	140	200	1.5	220	12.7	10.6	0.65	XKZ-20G2
	GZ6Q	150	210	250		380	16.4	13.3	1.5	XKZ-20G3
	GZ7Q	250	350	300			24.6	20	3	XKZ-100G3
	GZ8Q	400	560	350			39.4	32	4	XKZ-100G3
Flat groove	GZ5P	50	70	100	1.5	220	12.7	10.6	0.65	XKZ-20G2
	GZ7P	75	105			380	16.4	13.3	1.5	XKZ-20G3
	GZ7P	158	175				24.6	20	3	XKZ-100G3
Wide groove	GZ5K1		240	100	1.5	220	12.7*2	10.6*2	0.65*2	XKZ-20G2
	GZ5K2		240
	GZ5K3		270
	GZ5K4		300
Round tube	GZ1G	2		50	1.75	220	1.34	1	0.06	XKZ-5G2
	GZ2G	4		50			3.0	2.3	0.15	XKZ-5G2
	GZ3G	10		60			4.58	3.8	0.2	XKZ-5G2
	GZ4G	20		70			8.4	7	0.45	XKZ-20G2
	GZ5G	40		80			12.7	10.6	0.65	XKZ-20G2
Extra large	GZ11-T		100 materials are coal with a specific gravity of 0.85	300	1.5	380	47.6*2	38.6*2	5.5*2	SZK.00

Structure of This Feeder

This feeder consists of several components, including an electromagnetic coil, an armature, a feed trough, and a controller. When energized, the electromagnetic coil generates a magnetic field, causing the armature to reciprocate, which in turn drives the feed trough to vibrate continuously. The material moves forward along the feed trough under the influence of vibration, achieving stable conveying. The controller adjusts the vibration frequency and amplitude, controlling the material feeding speed by changing the current parameters.

Maintenance Tips from Our Engineering Team

Regular inspection of key wearing parts is required to guarantee stable equipment operation, including checks for coil gap, leaf spring condition and trough liner.

Coil gap inspection: Check the air gap between the electromagnetic coil and armature every 500 operating hours. Gap should remain within ±0.5mm of factory specification.

Spring condition: The leaf spring group is the most critical wear component. Replace when cracks are visible or when amplitude drops below 1.5mm at full voltage.

Trough liner: For abrasive materials (e.g., quartz, ores), we recommend installing replaceable wear liners to extend trough life.

Customized Options

These feeders can be customized according to different needs. Common customization types include:

Hanging design: Hanging electromagnetic vibrating feeders are usually designed to be suspended on brackets or hooks, suitable for occasions where hanging installation is required, such as limited space or places that require flexible movement.

Weighing design: It combines the functions of electromagnetic vibrating feeder and weighing system, and is used to accurately measure and control the supply of materials. It is widely used in occasions where accurate measurement of material supply is required, such as food processing, chemical production, pharmaceutical industry and other fields.

Customization for special requirements

High temperature materials: high temperature resistant materials and cooling measures can be used.

Example: For materials up to 300°C, we use high-temperature resistant spring steel and add forced air cooling to the electromagnetic coil.

Easy to clog materials: measures such as lengthening the feed trough and increasing the vibration frequency can be adopted.

Example: For sticky clay or wet sand, we lengthen the trough by 20-30% and increase vibration frequency to 4000 times/min (using frequency converter) to prevent material buildup.

Large particle materials: measures such as thickening the trough plate and increasing the vibration intensity can be adopted.

Example: For materials with particle size up to 500mm (e.g., ROM coal), we thicken the trough plate to 10-12mm and increase vibration intensity by 20%.

Application

This equipment has a wide range of application scenarios in industrial production, mainly including but not limited to the following fields:

Mining and mining industry: used to supply granular materials such as ore and coal from storage bins or hoppers to production lines such as crushers and screening equipment on demand.

Real-world challenge: In mining applications, the feeder often receives material from a primary crusher with highly variable feed size. Our solution: the GZ7-GZ11 models with heavy-duty trough and reinforced spring group handle feed sizes up to 500mm while maintaining consistent output.

Building materials: used to accurately supply granular raw materials such as sand, stone, cement to production lines such as concrete mixing stations and crushing equipment.

Real-world challenge: Cement plants require dust-tight operation. Our enclosed design (GZ-F series) with sealed cover prevents dust emissions, meeting environmental compliance standards.

Chemical industry: used to accurately supply powdered or granular chemical raw materials such as granules and powders to production equipment such as reactors and mixing equipment.

Food processing: often used to supply granular or powdered food raw materials such as grains and powdered sugar to food processing production lines to ensure the continuity and stability of the production process.

Real-world challenge: Food-grade applications require stainless steel construction and easy cleaning. Our SS304 trough with smooth welds and removable covers allows quick washdown between product changeovers.

Pharmaceutical industry: can be used to supply granular or powdered materials such as drug powder and capsule raw materials to mixing, tableting and other equipment in drug production lines.

Packaging industry: used for raw material supply on automatic packaging lines to ensure the automation and efficiency of the packaging process.

Solutions by Industry

• 

  Mines and Mining Companies

  Mines and mining companies often use electromagnetic vibrating feeders to feed raw materials such as ore and coal to production lines such as crushers and screening equipment to improve production efficiency and reduce manual operations.

• 

  Building Material Manufacturer

  Building material manufacturers may use these feeders to automatically feed raw materials such as sand, stone, cement, etc. to concrete mixing plants or other production equipment to meet construction needs.

• 

  Food Processing Companies

  Food processing companies often use them to accurately feed food raw materials such as grains and powdered sugar to food processing production lines to ensure the continuity of the production process and food quality.

 

Frequently Asked Questions

Q: How do I select the right model for my application?

A: Start with two key parameters: (1) Required capacity (t/h) – refer to our technical table; (2) Maximum feed particle size – ensure it's within the model's specification. For materials with high moisture (>15%) or fine powder (<200 mesh), choose enclosed type with 15° downward tilt.

Q: What's the difference between electromagnetic and motor vibrating feeder?

A: Electromagnetic feeders use high-frequency (3000/min) low-amplitude vibration, ideal for precise batching and fine materials. Motor feeders use lower frequency (500-1000/min) with higher amplitude, better for coarse, heavy materials. Choose electromagnetic for accuracy; choose motor for heavy-duty conveying.

Q: How long is the delivery time?

A: Standard models are available within 15 working days. Customized models require 20-25 working days depending on specification.

Q: Do you provide installation and commissioning support?

A: Yes. We provide detailed installation drawings and on-site commissioning guidance. Remote video support is also available.