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The Pocket Sluice

Author Topic: Need Your Trommel Knowledge!!  (Read 3185 times)

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Offline AuTiger

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Need Your Trommel Knowledge!!
« on: February 22, 2014, 04:20:42 PM »
Could someone please explain The workings of a Reverse Helix Trommel in comparison to a straight single barrel trammel??

Offline Park Ave

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Re: Need Your Trommel Knowledge!!
« Reply #1 on: February 22, 2014, 05:37:39 PM »
Regular trommel is slanted downwards,
material is fed in at the high end and gradually enters the trommel through gravity or gravity assisted by a spray bar
the trommel rotates and smaller materials fall through the screened sides in the trommel, while larger materials (e.g. stones) exit the lower end of the trommel.
In effect, the trommel is actibg to classify the feed material.
The trommel could be used to screen soil for landscaping or materials for a sluice.
The trommel screens for size, the sluice seperates by weight of the materials.

A reverse helix trommel acts similar to a Desert Fox wheel.
Material is fed into the lower or middle part of the trommel.
Lighter materials (i.e. sand) are washed out the lower end, perhaps into a sluice,
while the threads inside the rotating trommel bring heavier materials (i.e. gold or platinum) up to the higher end of the trommel.
The higher end of the trommel would catch nuggets

Offline AuTiger

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Re: Need Your Trommel Knowledge!!
« Reply #2 on: February 22, 2014, 06:55:00 PM »
Ok! Thankyou, so I'm guessing a sluice is needed at both ends to capture heavies, also is one any better than the other when dealing with fine gold and clay?

Offline jcazgoldchaser

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Offline AuTiger

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Re: Need Your Trommel Knowledge!!
« Reply #4 on: February 25, 2014, 08:08:59 AM »
 <-good_>Thanks Utah, I haven't seen these before, definitely solved some of my queries. That Gold machine vid was excellent and very well narrated. Nice set up also!

Offline Sir Pans Alot

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Re: Need Your Trommel Knowledge!!
« Reply #5 on: February 25, 2014, 10:31:53 AM »
The gold machine trommels work very well!  I like the mutli stage classification/sluices and the mini trommel on the side :P.

Look at the gold on this one from Dulac Brothers: Skip to 4:05 if you just want to see gold in sluice.

[youtube]http://www.youtube.com/watch?v=xelmAaSZnQg#t=253[/youtube]


Offline AuTiger

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Re: Need Your Trommel Knowledge!!
« Reply #6 on: February 25, 2014, 04:01:45 PM »
Yes, good vid and a jovial bunch! Thanks for sharing!

 


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