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starflash  
#1 Posted : Monday, 11 April 2011 1:02:31 p.m.(UTC)
starflash

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im looking for some good safe advice to burn off some mercury which is contaminating some of my coro gold. I have got a fume mask, leather gloves, a divers weight mould and a blow torch. I guess i will wait for a windy day and stay up wind.

any advice will be well recieved

thanks
starflash
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gavin  
#2 Posted : Monday, 11 April 2011 1:30:09 p.m.(UTC)
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I'm no expert so don't trust my advice alone...

Don't some people take a spud, cut it in half, make a hollow, place amalgamate in hollow, put 2 halves back together, wrap it tightly in foil, then roast it like a conventional roast potato in a fire? I believe all the harmful mercury ends up in the potato flesh without letting harmful fumes escape. Just remember not too eat it afterwards no matter how tasty it looks! ;)
kiwijw  
#3 Posted : Monday, 11 April 2011 2:43:11 p.m.(UTC)
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Edited by user Saturday, 9 July 2011 4:34:53 a.m.(UTC)  | Reason: Not specified

starflash  
#4 Posted : Monday, 11 April 2011 2:57:45 p.m.(UTC)
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nice thanks for that jw
criticol  
#5 Posted : Monday, 11 April 2011 4:04:21 p.m.(UTC)
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Hi Starflash,

TAKE GAVIN`S ADVICE as the safest way for the hobbyist to remove mercury from the amalgamated gold bits.
You can do it this way also by placing your gold on (say) a shovel or steel plate and covering the gold with ½ a potato, then just heat the plate up some way,(like) sticking the shovel in the embers of a fire. (Use your noggin, and you’ll find a way that suits you.)

When you`ve finished this operation, just "Crush" the potato up "UNDER WATER" to recover the Mercury for safe disposal,or,for future use.

If you just drive off the Mercury in the open air, “You” are polluting the surrounding environment, as the minute particles in the vapors will re-condense (Sublime) again as soon as their temperature drops, and that may just be on something that you are liable to shove in your mouth, (like) fruit etc.

This will possibly not cause you a problem! But if you make a habit of doing this, then remember that the effects of mercury inhalation etc, are cumulative, meaning that they add-up within your body causing problems.

I think that “EAGLE” has done this operation often with his “Fines” so just send him a PM and ask his method.

Cheers---Colin.

P.S. I would have thought, that you would have known this already??????

Edited by user Monday, 11 April 2011 4:23:35 p.m.(UTC)  | Reason: Not specified

starflash  
#6 Posted : Monday, 11 April 2011 5:24:24 p.m.(UTC)
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thanks criticol

yes i guess i should look after the environment, i will give that a go.

no i have never done that before, i have several separate amounts of gold from various trips that have a fair amount of mercury in them, so want to get rid of the nasty bits.

ps one of my speci jars which had a lot of grey material with the gold has now turned a powdery grey all over the species. im picking oxidising lead material, what do you think?
thanks guys
starflash
criticol  
#7 Posted : Monday, 11 April 2011 6:00:17 p.m.(UTC)
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Hi again Starflash.
You’re probably right about the oxidized lead.
The remains of lead shot? There’s a lot of it in all the creeks.(just to confound us!)

Years ago I found a single hand sized lump of rock in the “Pururi” area.
This rock weighed 11kgs! It was dark grey, and looked like fish eggs all compressed together, and it had a sort of golden sheen on it when it was wet.
(I thought I was “Made“.)
On having a bit of it assayed, it turned out to be a rare form of iron pyrites, so it was relegated to the scrap heap outside.
After about 10 years of weathering it started to breakdown to a leaden grayish powder that looked just like oxidized lead.
I always thought afterwards that this rock was some form of telluride,

Cheers---Colin.
kiwijw  
#8 Posted : Monday, 11 April 2011 6:03:39 p.m.(UTC)
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Edited by user Saturday, 9 July 2011 4:35:12 a.m.(UTC)  | Reason: Not specified

thanks 1 user thanked kiwijw for this useful post.
gavin on 12/04/2011(UTC)
kiwijw  
#9 Posted : Monday, 11 April 2011 6:12:03 p.m.(UTC)
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Edited by user Saturday, 9 July 2011 4:35:28 a.m.(UTC)  | Reason: Not specified

gingerbreadman  
#10 Posted : Tuesday, 12 April 2011 5:37:04 a.m.(UTC)
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JW,s way of just put it in a pan out side is a good way nice and simple .here,s some gold after it,s been retorted
File Attachment(s):
261.JPG (1,824kb) downloaded 72 time(s).
starflash  
#11 Posted : Tuesday, 12 April 2011 12:21:57 p.m.(UTC)
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hey ginger

the grey stuff left behind in your photo is that lead?

i was never very good at physics or chemistry, meagan who sat next to me got all my attention!
goldnugget  
#12 Posted : Tuesday, 12 April 2011 12:31:32 p.m.(UTC)
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Years ago I found some marcasite nodules which fit the description of fish eggs clumped together with light golden sheen. Some years later these had reduced to a greyish powder. As far as I recollect, marcasite is a form of iron pyrites. These particular ones were found in a coal seam, I think on the side of road somewhere near Charleston, on the Coast. (It was 40 odd years ago so not sure if it was the main road or a side road.)

Cheers,
Rick.
gingerbreadman  
#13 Posted : Tuesday, 12 April 2011 1:02:08 p.m.(UTC)
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starflash wrote:
hey ginger

the grey stuff left behind in your photo is that lead?

i was never very good at physics or chemistry, meagan who sat next to me got all my attention!

Lol did it pay off!!...gess not else you would no what that grey stuff is haha....im no good at chemistry eather i believe most of that grey stuff is chalk which is rubbed on the inside of the retort to stop the gold from sticking to the inside but could be someother stuff as well when it was melted i lost 3 grams .
kiwijw  
#14 Posted : Tuesday, 12 April 2011 3:27:32 p.m.(UTC)
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Edited by user Saturday, 9 July 2011 4:35:48 a.m.(UTC)  | Reason: Not specified

Eagle  
#15 Posted : Friday, 15 April 2011 9:11:31 a.m.(UTC)
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Hey Starflash I was shown some of that Coromandel gold the other day,Not the prettiest looking gold I've seen before.I now understand why you Coromandel boys always come down "South" here.
Maybe you should just turn your pieces in your speci jar into fishing sinkers Lol.

Go hard
Eagle
kiwijw  
#16 Posted : Saturday, 16 April 2011 7:52:13 a.m.(UTC)
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Edited by user Saturday, 9 July 2011 4:36:08 a.m.(UTC)  | Reason: Not specified

starflash  
#17 Posted : Sunday, 17 April 2011 3:44:28 p.m.(UTC)
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hi eagle

we know how gealous you southern boys get of us northerners
he is a photo of my latest coromandel finds
starflash attached the following image(s):
fishing-weights.jpg
kiwijw  
#18 Posted : Sunday, 17 April 2011 4:06:51 p.m.(UTC)
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Edited by user Saturday, 9 July 2011 4:36:24 a.m.(UTC)  | Reason: Not specified

criticol  
#19 Posted : Sunday, 17 April 2011 4:22:41 p.m.(UTC)
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Gooday Starflash.

Guess the fish would have a heart attack seeing that thing hurtling down through the water?

Cheers---Colin.
starflash  
#20 Posted : Sunday, 17 April 2011 4:49:55 p.m.(UTC)
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thats a photo of my retort. hahaha
i think i burnt all the gold off.

jw i think they might be gealous of our steady ground. no quakes up here
i havent been for coro scrounge for i while, but now winters here and growers are out, i will look at gettin back in there soon. any tips on placers jw, haha

too true colin its a lead chuckers sinker for sure, i think its for groper but i dont fish now, havent for about 8 years, i only spearfish now its more of a challenge
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