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I hear what your saying Lee....but!

The process of dry blowing uses a slightly different principle than the usual wet processing methods. The main difference I can think of is the fact that the riffles are slanting the opposite direction from what you would find in a water sluice . They slope back towards the feed end so that they form a trap that once something nice and heavy gets right down in there, there is very little chance of it coming up and over the lip again. The heavies get trapped in front of the riffles instead of behind. In theory, the constant vibes and air cushion effect of the blower style should really help those heavy bits get trapped easier while allowing the lighter stuff to keep flowing down over the riffles and out of the tray. The vibes we are talking about are very small and is just enough to keep things agitated......they are not an aggressive side to side motion like what we do when panning.

Having said all that, the only way to know for certain which system is better at fine gold recovery is to have one of each and process the same material through them and see which one wins..

Cheers,

<blockquote data-quote="MJB" data-source="post: 89532" data-attributes="member: 1222">I hear what your saying Lee....but!The process of dry blowing uses a slightly different principle than the usual wet processing methods. The main difference I can think of is the fact that the riffles are slanting the opposite direction from what you would find in a water sluice . They slope back towards the feed end so that they form a trap that once something nice and heavy gets right down in there, there is very little chance of it coming up and over the lip again. The heavies get trapped in front of the riffles instead of behind. In theory, the constant vibes and air cushion effect of the blower style should really help those heavy bits get trapped easier while allowing the lighter stuff to keep flowing down over the riffles and out of the tray. The vibes we are talking about are very small and is just enough to keep things agitated......they are not an aggressive side to side motion like what we do when panning.Having said all that, the only way to know for certain which system is better at fine gold recovery is to have one of each and process the same material through them and see which one wins.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /> Cheers,</blockquote>

[QUOTE="MJB, post: 89532, member: 1222"] I hear what your saying Lee....but! The process of dry blowing uses a slightly different principle than the usual wet processing methods. The main difference I can think of is the fact that the riffles are slanting the opposite direction from what you would find in a water sluice . They slope back towards the feed end so that they form a trap that once something nice and heavy gets right down in there, there is very little chance of it coming up and over the lip again. The heavies get trapped in front of the riffles instead of behind. In theory, the constant vibes and air cushion effect of the blower style should really help those heavy bits get trapped easier while allowing the lighter stuff to keep flowing down over the riffles and out of the tray. The vibes we are talking about are very small and is just enough to keep things agitated......they are not an aggressive side to side motion like what we do when panning. Having said all that, the only way to know for certain which system is better at fine gold recovery is to have one of each and process the same material through them and see which one wins.. :) Cheers, [/QUOTE]

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