Controlled Material Feeding
A feeding machine that delivers bulk materials at a controlled, adjustable rate to crushers, mills, screens, and conveyors. Feed size 300-1,200mm with capacities of 80-1,500 t/h. Available in electromagnetic and electromechanical types for precise feed rate regulation.
Product Overview
The vibratory feeder — also called a vibrating feeder — is a material handling device that provides controlled, uniform feeding of bulk materials from a storage hopper or stockpile to downstream processing equipment. In cement plants, it feeds limestone to crushers, coal to mills, clinker to cement mills, and raw meal to kilns — regulating the feed rate to match the capacity of the receiving equipment.
Proper feeding is critical in cement production. Overfeeding a crusher or mill causes blockages, motor overload, and equipment damage. Underfeeding wastes equipment capacity and reduces plant throughput. The vibratory feeder solves this by delivering a steady, adjustable flow of material — the feed rate can be precisely controlled from near-zero to full capacity, matching the downstream equipment's requirement at any given time.
LIMING vibratory feeders are available in two types — electromagnetic (for precise, stepless control of fine materials) and electromechanical (for heavy, coarse materials and large capacities). Both types use vibration to move material along a trough, with the vibration amplitude and frequency determining the feed rate. Robust construction with wear-resistant trough liners ensures reliable service in abrasive cement plant environments.
Classification
Each type is suited to a specific material size, capacity, and control precision requirement.
Uses an electromagnet to generate high-frequency (3,000 v/min), low-amplitude vibration. Feed rate is controlled steplessly by adjusting voltage via an SCR controller — providing precise, instant control from 0-100%. Ideal for fine materials, accurate dosing, and applications requiring automated closed-loop feed rate regulation.
Uses two counter-rotating motors with eccentric weights to generate lower-frequency (750-1,000 v/min), higher-amplitude vibration. More robust and capable of handling larger, heavier materials. Feed rate is adjusted by changing eccentric weight angle or using a VFD. Ideal for coarse feed (up to 1,200mm) and high capacities (up to 1,500 t/h).
A combined feeder and screen — the trough front section has grizzly bars that allow fines to pass through while oversize material is fed to the crusher. This pre-screens material, reducing crusher load and improving plant efficiency. Common after primary crushers and before secondary crushing stages in limestone circuits.
Key Benefits
Engineered for precise feed control, reliable operation, and protection of downstream equipment.
Electromagnetic feeders offer stepless control from 0-100% capacity via voltage adjustment — enabling precise matching of feed rate to downstream equipment needs. Automated control systems can integrate feed rate with crusher/mill load signals for closed-loop regulation, optimizing plant performance.
By regulating feed rate, the vibratory feeder prevents overloading of crushers, mills, and screens — reducing blockages, motor overload trips, and equipment damage. Grizzly models pre-screen fines, reducing crusher throughput and wear. This extends equipment life and reduces unplanned downtime.
Electromechanical models handle feed sizes up to 1,200mm and capacities up to 1,500 t/h — feeding large limestone blocks to primary crushers. Wear-resistant trough liners (manganese steel or Hardox) withstand abrasive cement raw materials for long service life with minimal maintenance.
The continuous vibration prevents material from adhering to the trough surface and promotes flow — making vibratory feeders effective for wet, sticky, or cohesive materials that would block other feeder types. Stainless steel or PTFE-lined troughs are available for extremely sticky materials.
Technical Data
Representative models. Custom trough sizes and liner options available for your specific application.
| Model | Type | Trough Size (mm) | Max Feed Size (mm) | Capacity (t/h) | Motor Power (kW) | Frequency (v/min) |
|---|---|---|---|---|---|---|
| VF-0930 | Electromagnetic | 900 × 3,000 | 300 | 80-150 | 0.5 | 3,000 |
| VF-1240 | Electromagnetic | 1,200 × 4,000 | 400 | 150-300 | 1.1 | 3,000 |
| VF-1550 | Electromechanical | 1,500 × 5,000 | 500 | 200-400 | 2 × 1.5 | 960 |
| VF-1850 | Electromechanical | 1,800 × 5,000 | 600 | 300-600 | 2 × 2.2 | 960 |
| VF-2060 | Electromechanical | 2,000 × 6,000 | 800 | 500-900 | 2 × 3.7 | 960 |
| VF-2460 | Electromechanical | 2,400 × 6,000 | 1,000 | 700-1,100 | 2 × 5.5 | 960 |
| VF-3070 | Electromechanical | 3,000 × 7,000 | 1,200 | 900-1,500 | 2 × 7.5 | 960 |
| GVF-1850 | Grizzly | 1,800 × 5,000 | 600 | 300-600 | 2 × 2.2 | 960 |
| GVF-2460 | Grizzly | 2,400 × 6,000 | 1,000 | 500-1,000 | 2 × 5.5 | 960 |
* Specifications are for reference only. Actual capacity depends on material type, bulk density, moisture, and trough inclination. Custom trough sizes and liner materials available — contact LIMING for sizing.
How It Works
The vibratory feeder moves material along a trough using controlled vibration. The vibration is generated by either an electromagnet (high frequency, low amplitude) or eccentric motors (lower frequency, higher amplitude). Each vibration cycle throws material forward a small distance — the cumulative effect moves material along the trough at a controlled rate.
Frequently Asked Questions