Strikeitrich
Member
- Joined
- Nov 28, 2011
- Messages
- 14
Hi all,
Is there anyone who can give me some helpful techniques for leaching gold out of ore?
Is there anyone who can give me some helpful techniques for leaching gold out of ore?
Reno Chris said:Its almost like asking what kind of tires should I buy for my car when none of us has any idea what type of vehicle we are talking about.
Traveller11 said:I have a placer ore with micron gold in it that seems to defy any gravity method I attempt to use on it, although I have not tried a centrifuge on it, yet. I am interested in using the acid/clorox leach on it but, there is just enough iron, in the form of magnetite and hematite, to interfere with this leach.
Is there any way to remove the iron chemically? Or, outside of cyanide, is there a leach that will dissolve only the gold and not touch the iron?
Traveller11 said:I'll put it this way. Almost everything from a deposit of black sand on the beach here will go through a 100 mesh screen and much of that will go through a 120 mesh screen. Yes, I could likely pan it, but then what? Pick it up with a snuffer bottle? At that rate, I would be a year putting together an ounce. Some of this gold is way smaller than 200 mesh.
There are no pickers in this material. We have tried sluices with all the fancy matting available. We could try a centrifuge, but those machines are ridiculously expensive, and you still end up with a concentrate of gold and black sand.
The best method I have devised is removing 90-95% of the magnetite and hematite with N52 neodymium magnets, leaving a concentrate of a low enough volume to make leaching economical.
The only thing standing in my way is removing the remaining iron prior to leaching with the acid/clorox leach.
butcher said:http://www.actionmining.com/Catalog.pdf
http://www.actionmining.com/
butcher said:Yes you can remove small amounts of iron, but to remove large amounts of black sand from a tiny amount of gold would cost in fuel, labor, chemicals and waste.
Smelting is also an option for concentrated gold with small amounts of black sand.
But the key word here is concentrating, basically separating the non gold materials and getting the gold materials as free from non gold as possible.
Miners usually can build what they need if they cannot afford to buy them, if you are handy you can build anything to may need to separate or to concentrate your gold.
Again if you’re not talking about a whole beach of sand a pan will work, if you are doing large quantity's then you will need to concentrate with other means.
You keep saying this gold is so fine you cannot pan it, are you sure it is not pyrite you’re seeing or trying to recover it is much lighter than the black sand and will float out easily, gold has a density much higher than the black sand and will stay in the pan when you pan out everything else, even minute pieces of gold weigh much more than the 2” and smaller rock, if fine gold try’s to float clean your pan, a drop or two of dish soap also helps.
This may give you some ideas:
http://www.google.com/search?hl=en&source=hp&q=gold+concentrator&gbv=2&oq=gold+concentrator&aq=f&aqi=g8g-m2&aql=&gs_l=hp.3..0l8j0i5l2.1437.8938.0.10047.19.14.1.4.4.0.79.985.14.14.0...0.0.GF7-6bgO_YI
Chinese were very good at panning gold, in this area Chinese miners sent billions of dollars in gold back to china, just from re-working the tailings the white miners let pass through their process. And these miners were capturing the very fine gold, maybe you need some Chinese to teach you to pan, or you can hire a few to pan for you. :lol:
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