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Hammermill

Model: L

Key Features

  • Robust construction for long life
  • Wide range of applications
  • Simple to operate and maintain
  • Power range from 30 to 90
  • 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. They can also be used for dry straw and fodder grinding. Industrial applications are numerous.

Construction

The mills are of exceptionally robust construction with a body in 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 in special double roller heavy-duty roller bearings.

Operation

Grain is introduced to the mill via the hopper. Material flow must be regulated and even, for which a feed control mechanism is required – see optional equipment. In the milling chamber, the hammers rotating at high speed pulverise the material into particles small enough to be drawn through the screen by the fan. Milled material is conveyed pneumatically into the collection cyclone from where it is discharged into a suitable receptacle. Fine dust from the top of the cyclone is trapped by the filters.

Alternative Filtration Systems

The milling process requires airflow to aid particle size reduction and to transport the material internally - for more industrial applications a reverse jet filter can be used, that cleans the air through ultra fine mesh filter bags, which are automatically and constantly cleaned by blasts of reverse compressed air. There is no loss of product in the exhaust air stream, and the whole grinding system is maintained under a slight negative pressure so there cannot be leaks of product at joints etc.

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

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.

Specifications
Model Motor Capacity Screen Size Qty of Hammer Overall Dimension (LXWXH)
L560/360 30 4 700x355mm 20 1620x818x1070mm
L560/400 37 5 700x395mm 24 1660x818x1070mm
L1120/300 55 9 1350x295mm 32 1750x1340x1692mm
L1120/30 75 12 1350x295mm 32  
L1120/40 75 12 1350x395mm 40 930x1340x1962mm
L1120/40 90 15 1350x395mm 40  

NOTES

  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.