Hammermills

Alvan Blanch produces a wide range of Hammermills that can be used for industrial or farm applications: for grinding grain to fine flour or to coarse meal for animal feed production. The Hammermills can also be used for dry straw and fodder grinding. They can also be used for the grinding of non-granular materials, such as cassava chips, maize cobs, and straw (with optional chute) .

Hammermill - Alvan Blanch
Alvan Blanch L650 900 Hammermill

L-Series Hammermills

  • Robust construction for durability.
  • Wide range of applications
  • Simple to operate and maintain
  • Power range from 30 to 90 kW
  • Suitable for non-granular materials
  • Pneumatic or mechanical discharge systems
  • Various filtration solutions

Application

Alvan Blanch industrial range Hammermills can be used for grinding grain into fine flour, or into coarse meal for animal feed production. The Hammermills can also be used for dry straw and fodder grinding. The industrial applications are numerous.

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Alternative Filtration Systems

The milling process requires airflow to aid particle size and to transport the material internally through the machine. For industrial applications, a reverse jet filter can be used. This jet filter cleans the air through ultra-fine mesh filter bags, which are automatically and continually cleaned by blasts of reverse compressed air. No product is lost in the exhaust air stream and the whole grinding system is maintained under a slight negative pressure, so there cannot be leaks of products at joints.

Permanent bar magnets are fitted across the width of the mill intake hopper, or a plate-type magnet with hinges is fitted into the feed duct for easy cleaning.

 

Construction

The mills are manufactured to be robust with a thick mild steel plate. The heavy-duty rotor is fitted with large, four-way, reversible hammers in tempered steel. The rotor has a large diameter shaft running with special double roller, heavy-duty, roller bearings.

Operation

The grain is introduced to the mill via the hopper, the material flow must be regulated and even (optional feed mechanism required, for optimal results). In the milling chamber, hammers rotate at high speeds to pulverise the material in to particles small enough to be drawn through the screen by the fan. The milled material is then conveyed pneumatically into the collection cyclone, and is then discharged in to suitable receptacle. Fine dust from the top of the cyclone will be trapped by the filters.

Optional Equipment

Metering devices are required for grain grinding – to ensure that the feed is evenly spread and regulated – rotary, vibratory or screw type are available.

Automatic control of the feeder, to match the maximum available load on the motor, allows the mill to constantly run at optimum capacity.

 

Cyclones

A range of different sizes are available from Alvan Blanch.

Rotary Valve

May be fitted to cyclone outlet to ensure airtight connection – either to optional two-way bagging device or to a holding hopper.

 

Special Versions

For applications such as breaking (not grinding) the mill can be equipped with a specially designed rotor running at reduced speed and arranged for gravity discharge from the milling chamber.

Grain Milling Systems

Packaged plants incorporating hammermills with automatic feeding system and packaging of flour into weighed bags are available – Details available upon request.

Alvan Blanch Skid Mounted Milling System Qatar 1

Skid Mounted Milling System – Qatar

Alvan Blanch Supervac Hammermilll

Supervac Hammermill with electric motor

Supervac Hammermills

  • Easy to operate and maintain
  • Convenient low-level feed hopper
  • Robust construction Electric, diesel or petrol drive
  • Suitable for most crops
  • Large diameter rotor and screen

The Alvan Blanch Supervac series Hammermills are designed for milling grain in to flour, or to act as part of a larger feed preparation system. They can also be used for the grinding of non-granular materials, such as cassava chips, maize cobs, and straw (with optional chute). 

Operation

Grain is tipped into the ground level suction feed hopper, from there, it is drawn by the powerful effect of the fan. Air is controlled by a slide that can be opened and closed when needed, letting in air and therefore reducing the volume of grain sucked from the feed hopper. The optimum feed rate from the hopper will be determined by the product processed. An ammeter is provided with the electric version, so that peak loading can be achieved.

Within the milling chamber there are hammers, rotating at high speed, to pulverise the material into particles small enough to be drawn through the screen by the fan rotor. The milled material is conveyed pneumatically into the collection cyclone, from there, it is discharged into the two-way bagging system. The two-way bagging device greatly improves productivity and ease of operation, as it enables one bag to be filled whilst the other is being removed.

Construction

The Supervac mills are of a robust construction, unlike many other competitors in the market. The main body is 3mm plate and the cyclone is a 1.6mm thick steel. A wearing plate is bolted into the lower section of the mill body. The mill rotor, which consists of four-way reversible hinged hammers of tempered steel, is built of 6mm and 10mm plate and mounted on a 45mm diameter shaft. A powerful fan rotor is fitted to the same shaft, and the full circle screens are available in a wide range of perforations and are easy to change. The suction feed hopper has been positioned at ground level – for ease of use. The Hammermill incorporates a stone trap, as well as a magnet. The new highly efficient cyclone reduces dust at the discharge point and is equipped with a two-way bagging device, with quick release sack clamps as standard.

Optional Equipment

Remote Feed:

 Due to the powerful suction effect of the fans, the feed hopper can be positioned away from the mill (via extra pipework).

Direct Feed:

 For non-granular materials (straw etc) a special direct feed chute is fitted – this incorporates a control slide for flow control when used on grain.

Dust Collection:

Filter stocking arrangement can be coupled to the cyclone outlet to collect fine dust.

Mill Mix Combination:

The cyclone can be mounted on an Alvan Blanch meal mixer for animal feed milling.

Alvan Blanch Supervac Hammermill Nigeria

Supervac 214 series Hammermill fed by augers from the maize & cake bunkers

L-Series Hammermills Specifications

ModelL560x36L560x40L650×450L650×600L650×900L650×1200L650×1500
Rotor diameter (mm)560560675675675675675
Width of grinding chamber (mm)36040045060090012001500
Main shaft speed (rpm)2940295029702970297029702970
Linear speed of hammer (m/s)8686105105105105105
Number of hammer20247296144192240
Power (kW)22 / 3030 / 3730 / 4555 / 7590 / 132132 / 185200 / 315
Capacity (t/h)3 – 44 – 51.5 – 2.43 – 45.2 – 77.7 – 9.811 – 16
Bearing model for rotor shaftSFK 2212SFK 2212SKF2216SKF2216SKF2317SKF2317SKF2317
Grease type for rotor bearingsLGHP2LGHP2LGHP2LGHP2LGHP2LGHP2LGHP2
Screen sizes (mm)700 x 395700 x 395(910 x 425) x2(910 x 290) x4(910 x 290) x6(910 x 290) x8(910 x 290) x10
Air flow (requirements (m3/h)28002800360048007200960012000
Air pressure (Pa)800 – 1000800 – 100011501150115011501150
Number of anti-vibration mounts4466688
Weight (kg)7466451410 -14802070 – 22302670 – 29963350 – 34504370 – 4400
Length (mm)1453158618002170253028703200
Width (mm)74977011801180118011801180
Height (mm)1070142014801480148014801480

1) Outputs – are based on dry maize passing through 3mm and 1mm screens and are given for general guidance only. On barley, outputs will be approximately 25% lower
2) There are various hammer configurations for different applications. For fine grinding, the full complement of hammers should be used.

Supervac Hammermills Specifications

Model212 / FP212/10D212/15E212/15D212/20E212/20D
Drive UnitsFlat belt pulleyLister TS1 diesel11kW electricLister TS1 diesel15kW electricLister TS2 diesel
Output (1)
5mm screen
Depending on power10001500112520002000
Output (1)
3mm screen
Depending on power750110085015001500
Output (1)
1mm screen
Depending on power250375300500500
Screen Area cm2839839839839839839

 

Model214/FP214/25E214/25D214/30E214/30DFBC60
Drive UnitsFlat belt pulley18kW electricLister TR2 diesel22kW electricLister TR3 diesel30kW electric
Output (1)
5mm screen
Depending on power25002250300030004600
Output (1)
3mm screen
Depending on power19001725230023003500
Output (1)
1mm screen
Depending on power3506008008001200
Screen Area cm21,6781,6781,6781,6781,6784,040

 

1) Outputs are approximate, based on dry maize through screens of the different sizes stated.

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