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

Model L560x36 L560x40 L650×450 L650×600 L650×900 L650×1200 L650×1500
Rotor diameter (mm) 560 560 675 675 675 675 675
Width of grinding chamber (mm) 360 400 450 600 900 1200 1500
Main shaft speed (rpm) 2940 2950 2970 2970 2970 2970 2970
Linear speed of hammer (m/s) 86 86 105 105 105 105 105
Number of hammer 20 24 72 96 144 192 240
Power (kW) 22 / 30 30 / 37 30 / 45 55 / 75 90 / 132 132 / 185 200 / 315
Capacity (t/h) 3 – 4 4 – 5 1.5 – 2.4 3 – 4 5.2 – 7 7.7 – 9.8 11 – 16
Bearing model for rotor shaft SFK 2212 SFK 2212 SKF2216 SKF2216 SKF2317 SKF2317 SKF2317
Grease type for rotor bearings LGHP2 LGHP2 LGHP2 LGHP2 LGHP2 LGHP2 LGHP2
Screen sizes (mm) 700 x 395 700 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) 2800 2800 3600 4800 7200 9600 12000
Air pressure (Pa) 800 – 1000 800 – 1000 1150 1150 1150 1150 1150
Number of anti-vibration mounts 4 4 6 6 6 8 8
Weight (kg) 746 645 1410 -1480 2070 – 2230 2670 – 2996 3350 – 3450 4370 – 4400
Length (mm) 1453 1586 1800 2170 2530 2870 3200
Width (mm) 749 770 1180 1180 1180 1180 1180
Height (mm) 1070 1420 1480 1480 1480 1480 1480

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

Model 212 / FP 212/10D 212/15E 212/15D 212/20E 212/20D
Drive Units Flat belt pulley Lister TS1 diesel 11kW electric Lister TS1 diesel 15kW electric Lister TS2 diesel
Output (1)
5mm screen
Depending on power 1000 1500 1125 2000 2000
Output (1)
3mm screen
Depending on power 750 1100 850 1500 1500
Output (1)
1mm screen
Depending on power 250 375 300 500 500
Screen Area cm2 839 839 839 839 839 839

 

Model 214/FP 214/25E 214/25D 214/30E 214/30D FBC60
Drive Units Flat belt pulley 18kW electric Lister TR2 diesel 22kW electric Lister TR3 diesel 30kW electric
Output (1)
5mm screen
Depending on power 2500 2250 3000 3000 4600
Output (1)
3mm screen
Depending on power 1900 1725 2300 2300 3500
Output (1)
1mm screen
Depending on power 350 600 800 800 1200
Screen Area cm2 1,678 1,678 1,678 1,678 1,678 4,040

 

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

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