DISCUSSIONS

Hammer or roller mill and dry Vs wet milling

I am a new member in this feed industry.
I work in a company which works out projects in ethanol distilleries and brewries.
Our main raw material in European region is wheat and corn.
So i want to know which mill will be preferable in terms of initial cost and operationgcost (i,e. power consumption, manpower).
Also i want to compare which method is good dry miling or wet milling in the similar aspects as mentioned above.
One of typical application is -

Particle size distribution requiredis-
Upto 0.3 mm - 10 to 20%
0.3 mm to 0.8 mm - 60 to 70%
0.8 mm to 1 mm - 10 to 20%
1 mm to 1.2 mm - 5 to 10%.

The typical wheat properties-
Bulk Density - 500-600 kg/m3
Particle size - 4-8 mm
Moisture - 10 % w/w.
Impurities - 0.1 to 0.2 % max of input ( Husk,stones&other impurities )

So please guide me in this case, or suggest me some links so that i will be able to study it deeply.

Thanks.

Comments

  • edited November -1
    Dear MY Freind..
    in feed process the raw material as wheat and corn it is mill by hammer mill which is working be moisture contain lower than 11%. dry mill is normal in feed mill process.
    for more information please contact to me by
    <!-- e --><a href="mailto:younder2000@yahoo.com">mailto:younder2000@yahoo.com</a><!-- e -->
    younder is project manager of idah machinery we offer all models of hammer mill
  • edited November -1
    Hi

    You have to weigh up the pros and cons of hammer milling versus roller milling.
    By the sounds of things you are looking to have a constant particle size on your grounded corn or wheat. For this rolle mills will suit your application better, as the gap in the roller mill will be the particle size you require. You will also have better retention of inherent moisture in the product at better thoughput with lower power consumption.

    Hope this can help.
  • edited November -1
    Hello,

    Dry Hammer milling is your best option if you need those particle sizes, a roller mill will let some whole/half grains through. The grain needs to go through a screen to guarantee particle size.

    You would need magnet protection before the mill and a grate for large impurities. As for running and purchase costs, how much are you looking to process per annum? Is it fixed plant or mobile? Electric or fuel powered?

    I am surprised you have wheat at 10% moisture? If so this will break down easily. Most wheat is traded up to 15% moisture which is still good to mill, wheat can be hammer milled into the mid 20's in moisture but it takes more time/energy.

    Your suggested density is also very low.

    Calamill
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