Have you ever noticed how each type of beverage has its own unique glass? There are beer mugs, wine glasses, brandy snifters, water glasses and so forth. Red wine is generally served in a different glass from white wine or champagne, and there are a number of beer glasses used to enhance the experience of drinking Pilsners, ales and other beers.

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What do they all have in common? They are delivery devices, each designed to feed different types of beverages in the best way possible for that particular beverage.

The same holds true in our businesses as it relates to feeders.

Look through a few machinery websites and you will see the diverse types of feeders available. These are paired with various forms of crushers, screens, wash plants and material handling devices. The benefits of each style of feeder are often overlooked, yet each can be a big contributor in the overall success of the plant.

If you think about it, the feeder is the mouth of the plant. It needs to be capable of 'eating' whatever diet the plant is on.

Obviously, each feeder type is designed to meet the unique characteristics of a particular application. While many are routinely used in an array of applications ' especially portable configurations ' understanding the operating principles, variables and limitations of each can potentially boost efficiency, as well as maintain uptime.

Vibrating grizzly feeders

Most commonly used ahead of a primary crusher, vibrating grizzly feeders (VGFs) are perhaps the most popular design used today. This is primarily due to their dual role as both a feeder and a scalper to bypass or reject dirt and fines.

VGFs are also popular due to a long, or wide, feed opening that is favorable to being fed by a wheel loader. They are robust enough to accept large surges of material, as well as large boulders.

Adjustable grizzly openings provide some control over the size of material being fed into the crusher, as well as what is rejected ahead of the crusher. This saves crusher wear cost while boosting plant capacity.

It should be understood, too, that VGFs rely on a vibrating mechanism to lift and throw the material down the length of the feeder pan. Accordingly, if too few G-forces are generated then the result can be an ineffective device that does not efficiently transfer the material or clear grizzly openings. This can be an issue in sticky material.

Ideal applications for a VGF include primary crushing plants used in shot quarry and sand-and-gravel operations. They are popular in wheel, track and stationary plant configurations.

Roller belt feeders

The biggest advantages of the roller belt feeder are their relatively low cost and that it is a 'positive feed' device that does not rely on vibration to move material.

Belt speeds can easily be adjusted or automated for precise volumetric metering. The loading hoppers and feeder lengths can be designed to accommodate just about any type or size of loader or excavator. Often, these machines are equipped with hydraulically tipping grids to prevent excessive feed material from entering the system. This is especially beneficial when feeding a machine with a limited feed size.

You can expect a belt feeder to require similar maintenance to that of a conveyor. The rollers used are generally limited in terms of the feed size and impact that can be introduced to a belt feeder. Obviously, unlike a VGF, a belt feeder does not have the advantage of an integral scalping device.

Ideal applications for a belt feeder include sand-and-gravel operations, truck and railcar loaders and unloaders, and mobile wheel and track screen plants.

Apron pan feeders

Similar to belt feeders, apron feeders are 'positive feed' devices that are well suited to applications where sticky materials may be prevalent.

Pan speeds can be adjusted to enable precision metering of feed. Like a belt feeder, apron feeders can also be designed to any length to accommodate the desired loading device.

However, an apron feeder provides the additional advantages of being capable of feeding material at an incline, as well as being very robust and capable of accepting large feed sizes and heavy impact. If properly maintained, unscheduled downtime of apron feeders is rarely an issue. As such, these devices are very popular on primary crushing plants paired with a scalping pre-screen, in mines and on mobile track scalping screen plants.

There are several other devices that are intended to carry material from point A to point B, including reciprocating plate feeders and vibrating pan feeders.

Selection criteria

It is always important to first understand the fundamental application criteria: top size, capacity and material characteristics. These three criteria will help define the type and size of the feeder that can best meet your needs in the most economical method possible.

At that point, additional variables can be weighed, including any mobility or relocation requirements, varying feed materials and so forth.

For more Universal Jaw Crusherinformation, please contact us. We will provide professional answers.

If you're still in doubt, write down the diet of your operation and then consult with both your internal and external industry peers for feeder selection advice. They will be happy to help you decide the best way to feed your plant.

VIBRATING GRIZZLY FEEDER

VIBRATING FEEDER, VIBRATING GRIZZLY SCREEN

DOVE Vibrating Grizzly Feeders, also referred to as Vibrating Grizzly Screens are highly efficient feeders designed to perform two major function of feeding ore into the next stage of the processing plant, as well as simultaneously separate and reject the oversize rocks.

DOVE Vibrating Grizzly feeders are well known in the mining industry for quality, ruggedness, and efficiency, providing continuous feed rate under various extreme conditions of material loading, heavy shock loads from earthmoving equipment.

DOVE Vibrating Grizzly Feeders are supplied in 34 models, capacity range of (5 ' 700 Tons/Hour), in various technical specifications, to be integrated mainly at primary feeding applications in Mining for Hard rock primary deposits, or Alluvial secondary deposits, Dredging and Floating plant application, Quarries, Cement, Sand & Gravel operations, Recycling, Solid waste treatment, industrial processing, etc.

FEATURES:

• DOVE with over 50 years fabrication expertise, supplies the largest range of Grizzly feeders, configured as Vibrating Grizzly Feeders, or Static Grizzly Feeders, for Hard Rock minerals processing plants, or Alluvial and Tailing Plants, as well as Grizzly Feeders for various other industries.
• DOVE supplies Vibrating Grizzly feeders in 34 models, with capacity range of (5 ' 700 Tons/Hour), as well as special configurations for processing plants of up to Tons/Hour.
• DOVE standard models of Vibrating Grizzly Feeders are supplied in 11 different widths to match up to every crusher opening width. In special application we can tailor make the size for proper integration.

• DOVE supplies Vibrating Grizzly Feeders for Stationary, Portable/ Mobile processing plants, either at the Feed Point to the Feed Hopper, or at the Feed Point to any type of primary Crusher, or Classifiers.
• The Back plate and screening bars are manufactured with wear resistant harden steel, impact resistance and long life.
• DOVE Vibrating Grizzly is highly efficient in pre-screening the fine material, to increase crushing efficiency in Hard Rock mining applications, or screening the oversize to increase efficiency of classification and concentration in Alluvial mining applications.

• DOVE Vibrating Grizzly designed for Low noise, Low Power consumption, Steady vibration, Continuous and uniform feeding, large feeding capacity, and adjustable grid spacing.
• DOVE Vibrating Grizzly is configured with abrasion resistant Grizzly Bars, abrasion resistant Lined Bed and Side Plates, and adjustable & replicable Grizzly Bars.

APPLICATIONS:

• DOVE Vibrating Grizzly Feeders are widely used in Mining for Hard Rock deposits, Alluvial deposits, River Dredging plants, Cement production plants, Construction material production, Lime, Silicate, Ore dressing industries, Power sector, Steel sector, Chemical industry, Foundries, etc.
• DOVE Vibrating Grizzly is effectively deployed in screening (river pebbles, basalt, dolomite, granite, coal, construction waste, diabase, silica, zinc ore, iron ore, quartz, copper ore, limestone, various types of ore, fireclay, slag) etc.

• DOVE Vibrating Grizzly is implemented after the dry feed hopper, in Hard Rock (primary Deposit) mining applications, to screen the undersize out and feed the selected ore size to any primary crusher. DOVE Vibrating Grizzlies are highly efficient and econimical to be configured with Jaw crushers, Impact crusher, Cone crusher, Roll crusher, etc.
• DOVE Vibrating Grizzly is highly efficient device to be configured after the Dry or Wet feed hopper to screen the oversize rocks out and flow the selected undersize to the Trommel Classifier, in Alluvial (Secondary deposits) mining applications.
• DOVE Vibrating Grizzly feeders are effectively configured on the Hopper of Trommel Classifier, in Alluvial (secondary deposits), to screen out the oversize reject rocks, in the absent of feed hopper, and where the plant requires direct feed to the Classifier.

VIBRATING GRIZZLY FEEDERS TECHNICAL SPECIFICATIONS

MODELS TYPE FEED CHUTE SIZE CAPACITY MAX. FEED SIZE MOTOR POWER (mm) (TPH) (mm) (kW) VGM-D DRY 300 x 5 ' 10 300 0.3 VGM-W WET 300 x 5 ' 10 300 0.3 VGM-D DRY 400 x 15 ' 20 300 0.6 VGM-W WET 400 x 15 ' 20 300 0.6 VGM-D DRY 600 x 20 ' 30 300 1.1 VGM-W WET 600 x 20 ' 30 300 1.1 VGM-D DRY 600 x 30 ' 50 300 2 x 1.1 VGM-W WET 600 x 30 ' 50 300 2 x 1.1 VGM-D DRY 900 x 50 ' 80 300 5.5 VGM-W WET 900 x 50 ' 80 300 5.5 VGM-D DRY 600 x 80 ' 100 400 1.1 VGM-W WET 600 x 80 ' 100 400 1.1 VGM-D DRY 800 x 80 ' 120 400 2 x 3 VGM-W WET 800 x 80 ' 120 400 2 x 3 VGM-D DRY 800 x 100 ' 120 400 11 VGM-W WET 800 x 100 ' 120 400 11 VGC-D DRY 960 x 120 ' 210 500 11 VGC-W WET 960 x 120 ' 210 500 11 VGM-D DRY x 150 ' 200 500 15 VGM-W WET x 150 ' 200 500 15 VGC-D DRY x 200 ' 430 500 2 x 3.7 VGC-W WET x 200 ' 430 500 2 x 3.7 VGC-D DRY x 280 ' 500 580 15 VGC-W WET x 280 ' 500 580 15 VGM-D DRY x 100 ' 150 500 4 VGM-W WET x 100 ' 150 500 4 VGM-D DRY x 150 ' 200 500 5.5 VGM-W WET x 150 ' 200 500 5.5 VGM-D DRY x 150 ' 250 500 18.6 VGM-W WET x 150 ' 250 500 18.6 VGC-D DRY x 300 ' 550 650 22 VGC-W WET x 300 ' 550 650 22 VGM-D DRY x 600 ' 700 650 37.5 VGM-W WET x 600 ' 700 650 37.5

* DOVE reserves the right to modify the specifications at anytime, without prior notice.

WARRANTY:

All DOVE equipment carry a standard Manufacturer's Warranty, which can be extended to 5 years, in addition to lifetime spare parts supply service.

DOVE provides full technical services worldwide, including plant engineering design, mining site construction design, site assembly, installation, test run and training.

MANUFACTURING FACILITIES:

DOVE Equipment & Machinery manufacturing facilities are located about 30 minutes drive from the company Head office in Bangkok, which includes 8 factories and showroom.

DOVE Equipment and Machinery with over 50 years manufacturing expertise, and the largest range of mining and minerals processing technologies is the recipient of ISO : , Green Industry Certification, and Golden Eagle of Asia Awards Best Business of the Year (DOVE Equipment and Machinery and DOVE Instruments), which insures highest quality and standard of our manufacturing and customer service practices.

DOVE Manufacturing Facilities.

DOVE Equipment and Machinery 8 Factories.

Video of DOVE Manufacturing Facilities:

MINERAL TEST SERVICES:

DOVE laboratory will assay your ore samples rapidly and analyze your raw materials and recommend the most efficient processing plant according to the ore specifications, minerals composition, and ore assay results, and your project size and the geologic and topographic conditions of your mine.

Please,  CONTACT US  for your sample analysis and quotation.

OPERATING PRINCIPALS:

DOVE Vibrating Grizzly Feeders are highly effective and popular Grizzly screener/feeders with a history of reliability and durability in the mining, aggregate, construction, and various other industries. They are designed for continuous and uniform screening and feeding of selected size of ore in various processing plants design and configuration.

DOVE Vibrating Grizzly Feeders are designed with the following components:

1. The Pan section, which is basically where the feed is deposited from the feed hopper, or in the case of the portable or mobile plant, from the excavator or Conveyer belt.
2. The Discharge section, which is immediately following the Pan section, which consist of the Grizzly section, which is configured with Gaps between the Grizzly Bars, which allows the undersize material to pass through before discharge to the next component of the processing plant, which is either a type of primary crusher in Hard Rock processing plant, or a Trommel in case of Alluvial processing plant, or a classifier/ Vibrating screen in solid waste treatment plant, or a conveyer assembly to transport the material, etc.
3. Vibrating Mechanism, which is located under the Feeder, where also the feeder is configured with heavy duty springs on each side, which allows the feeder to vibrate via the mechanism located under neath the Pan section. The feeder is designed with a shallow wall, to protect the vibrating mechanism and the Electric motor from any feed material which may miss the Feeder during the loading of material and fall off the Feeder. The Grizzly Feeder is designed with a certain angle, which allows the material to get further lose and move forward from the Pan section to the Discharge section, by the combined action of Vibrating force and Gravity, while segregating the material.
4. Material Segregation, Material on continuous basis moves forward from the Pan section to the Grizzly section. The Vibration force results in segregation of material and the finer particles smaller than the Gap in the Grizzly bars section goes through the Grizzly bars gap and settles in the bottom channel bellow the Grizzly section, ready for the next step of the process.

In the case of Hard rock plant where the segregated fine material is selected by Grizzly feeder, the bypass fine material decreases the amount of oversize material going to the crusher, which results in selection of smaller capacity crusher and subsequently in saving in maintenance and spare wear parts. The segregated fine material can be combined with the output of the crusher to go to next step in processing and recovery, or if there are no economic value, it can be discarded.

In the case of Alluvial mining, the segregated fine material are collected by conveyer and move to classifier and concentrators for recovery of minerals. The over size rucks are discarded, or in some cases can move to crushers.

Vibrating Grizzly Feeder is an important item of equipment, integrated to various types of processing plants for segregation of material, and to eliminate over capacity in the design of processing plants, which results in economic value for project.

WE HIGHLY RECOMMEND FORWARDING SOIL SAMPLES OF YOUR MINE TO US FOR ANALYSIS, IN ORDER TO DESIGN AND RECOMMEND THE MOST EFFICIENT PROCESSING PLANT, TAILOR MAID TO YOUR MINE REQUIREMENTS, FOR HIGHEST PRODUCTION RECOVERY.