gold recovery from black sands

		Quote:			Posted by GoldDigger1950
	Quote:         Posted by goldnboy             It's been done for over a hundred years, & with some very good results. I think Homefire was saying you can check it out on you tube. Im sure they must have something on there.           Not at all. He is incorrect. What has been done is to accumulate black sand using a sluice, not separate the gold from the black sand. That requires far different techniques. That's why I asked what you meant. Homefire mentioned a tube but referred to it incorrectly. He was talking about the Henry Henry Sluice which is not used for separating gold from black sand. Think about this for a minute. The black sand and gold have very density making them very hard to separate. A sluice will not do the job. Look, mate, if you can't understand what the discussion is about, try asking more questions. Don't jump on a wrong answer just because it sounds good. A sluice is a FIRST stage of gold recovery, not a final stage. A shake table, spiral aggregate sorting wheel or a gold pan are what is needed. Then when you get to a certain point, you might need to use some very harsh chemicals or mercury. Certainly not a sluice or a Henry Henry.

 Sorry GD but this time I think you are wrong, I was just watching U tube a couple of days ago & they were gathering the black sands from a lake edge and then putting them through the sluice process. This was being done in Alaska. Think about what happens to all the black sands that wash down from streams and rivers all around the world, and what else is with those black sands    then how are we going to separate  them? I would suggest with a special sluice box made for this purpose.

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  In certain situations black sands will be found in a very large amounts , That have been accumulation over a very large amount of time. The black sands I was refering to in Alaska had been washed back onto the beach from a storm type scenario, this process is like a natural sluice box, now all one has to do is bucket up the black sands and then process it fOR  the recovery of the gold. Now the first part of the process for these folks was to run it through a sluice box system. I can have a look on you tube at a later date
 for the link. I think in Oregon USA black sand on the beach may have been sluiced for the recovery of gold also. 

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		Quote:			Posted by goldnboy
	In certain situations black sands will be found in a very large amounts , That have been accumulation over a very large amount of time. The black sands I was refering to in Alaska had been washed back onto the beach from a storm type scenario, this process is like a natural sluice box, now all one has to do is bucket up the black sands and then process it fOR  the recovery of the gold. Now the first part of the process for these folks was to run it through a sluice box system. I can have a look on you tube at a later date  for the link. I think in Oregon USA black sand on the beach may have been sluiced for the recovery of gold also.

You're pretty desperate to be right here.

Black sand and gold when they are the result of sluicing cannot be made to be more separate by additional sluicing. Thus, my answer. But you can continue to come up with dream scenarios that force me to admig that in that particular circumstance, you might consider a sluice. But that was not your original question. Go back and read it. My answers have all been 100% correct. Until you come up with one more reason to ask a DIFFERENT question.

Yes, in Alaska where the black sands are naturally occurring volcanic residue, a sluice will do the job but when the black sand and gold combination result from a sluice or dredge action, the answer is still no. They are too close to the same density which is what makes it so difficult.

Now if you want to continue playing games, go right ahead. Just remember to never, ever ask me a question again. This is no way to treat someone with decades of experience who spends time trying to educate you. Just learn by making mistakes that hundreds of thousands of us have made before you and learned from them. Good luck, Goldnboy. You're going to need it.

Posted on: February 11, 2013, 01:23:39 PM

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And by the way, the Alaskan black sand is just that. Black sand. Not the heavy iron and gold mix you get from sluicing. Learn, Grasshopper. Learn.

Posted on: February 11, 2013, 01:24:47 PM

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		Quote:			Posted by Gramps43
	You can use a finishing sluice on black sands, I used my MacKirk Mini Long Tom on the beach black sand that congregates around stream outfalls here in Oregon and got a bit of fine stuff, the panning was tedious but it was there.  I built a mini ball mill to process the remaining black sand but haven't done anything with them yet.

There are some options, sure, but you still end up with black sand and gold unless you use advanced equipment.

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Yes mercury will soak up the small stuff but unless it is used very cautiously and with every saftey precaution it can cause very serious harm.  At the very minimum face masks and heavy rubber gloves should be worn.

Gramps

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I agree I wouldn't use it either, it could do some nasty things to my already comprimised old grey cells.  But if they are going to use it, like I said, those the bare minimum, a full hazmat suit would be rather uncomfortable in those climes.  If they used one of those cabinets similar to a biological handling cab. that would be even better.

Gramps

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