Crushing, Screening & Conveying

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Principal Design Of Trommel Screen (3 replies)

H
mhasanmtqn
4 years ago
mhasanmtqn 4 years ago

Hello, i want to ask about trommel screen, i had a project to design a trommel screen, but i so confused about the principal to make a trommel screen design, i dont find a principal on internet, if anyone have a book/pdf about that, please share the link below. in picture below is my example design with : 

  1. incline 4degree
  2. size = ID 2250 x 1000 L
  3. capacity = 300 t/hr
  4. rpm = 8.5
  5. drive unit = motor 75 kw+chain drive+Gear reducer

my trommel screen have divided by 3 mesh material

  1. 407 -323 mm
  2. 323-224
  3. 224 - 150

and material from jaw crusher feed is 

  1. 407 -332 (26,67%)
  2. 323-224 (35,33 %)
  3. 224 - 150 (7,83%)
  4. the rest of it is material over 407

my question is, what the basic theory to determine length of mesh based on material feed from jaw crusher? or my picture had good design for trommel screen? please anyone comment anything. 

Thanks

tromme
https://www.911metallurgist.com/wp-content/uploads/2019/11/tromme.png
Mike
4 years ago
Mike 4 years ago
Like

R. H Richards Text Book on Ore Dressing has a section on Trommel Design, the book (1940)

d
David
4 years ago
David 4 years ago
Like

thanks Mike. Most of Richards' books are here https://archive.org/search.php?query=creator%3A%22Robert+Hallowell+Richards%22 and https://catalog.hathitrust.org/Search/Home?lookfor=%22Richards,%20Robert%20H.%201844-1945.%22&type=author&inst= for free.

J
carman
4 years ago
carman 4 years ago
Like
1 like by Saeed Alijani

The first item to understand is a   Trommel Screen is at least 5 times or more less efficient than a vibrating screen. I would suggest you do a area size calculation and see how much area you would need. The decline of the Trommel will just increase the material velocity. I would also install lifter bars on the inside of the trommel circumference evenly spaced about a meter long a tapered to the discharge end. This will push the material forward and allow more material to enter the feed end. The drive will depend on what mass you wish to move,

 

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