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#1
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Building a small silver recovery unit
Well frustrations with the small silver buckets have me investigating
building my own silver recovery system. If anyone out there has any references, input, has done that and would like to share the design and how it works, it would be greatly appreciated. It really looks like it could be done fairly simply with a low voltage current, two simple means to conduct it through the fluids, and a means to keep the fluid moving. Thanks in advance Mark |
#2
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Building a small silver recovery unit
I don't know how small a unit you want. I produce only about a gallon of
spent fixer per month, and I bought a complete inexpensive precipitator from Porters camera ( http://porters.com/Merchant2/merchan... ory_Code=D1H). I guess you could add a pump to circulate the spent fixer, but mine seems to work well using convection only. It takes up to several days to treat a gallon of spent fixer. I'm not sure how efficient it is (what the final concentration of silver remaining in suspension is). "Mark B" wrote in message news:yM7zg.1343$ee1.1339@trnddc06... Well frustrations with the small silver buckets have me investigating building my own silver recovery system. If anyone out there has any references, input, has done that and would like to share the design and how it works, it would be greatly appreciated. It really looks like it could be done fairly simply with a low voltage current, two simple means to conduct it through the fluids, and a means to keep the fluid moving. Thanks in advance Mark |
#3
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Building a small silver recovery unit
"Pieter Litchfield" wrote
I don't know how small a unit you want. I produce only about a gallon of spent fixer per month, and I bought a complete inexpensive precipitator from Porters camera http://porters.com/Merchant2/merchan... ory_Code=D1H). Looks good. The yeild number is a bit deceptive: "30-50 oz of silver/year if you use as little as a gallon of fix/month". 1 gallon of fix does ~200 8x10's. 50 weeks of 200 = 10,000 8x10's / year to get 50 oz of silver. $550 from $4,000 of paper at $11/oz for silver. Refining costs are ???, the local scrap dealer gives about 0.10 on the dollar for metal of unknown purity. Steel wool in a bucket works if all you want to do is keep the silver from going into the drains. From the above 100 8x10's [an amount I can get my head around] produces 0.5 oz of silver. All numbers +/- an order of 2. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics, Photonics, Informatics. Remove blanks to reply: n o lindan at ix . netcom . com f-Stop enlarging timers: http://www.nolindan.com/da/fstop/ |
#4
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Building a small silver recovery unit
Nicholas O. Lindan spake thus:
Steel wool in a bucket works if all you want to do is keep the silver from going into the drains. I'd be interested in learning more about this method, since as you point out, one isn't really going to make it economically feasible to recover silver on such a small scale; the main thing should be not harming the environment. So how does this work? How effective is it? -- I think someone should unplug the entire Internet and let us start all over again. This time, make sure that Sergey Brin, Larry Page, Jimmy Wales, and any admins from Wikipedia are not allowed to play, by order of the U.N. Security Council or whatever. - Daniel Brandt, on Wikipedia Review (http://wikipediareview.com) |
#5
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Building a small silver recovery unit
Nicholas O. Lindan wrote:
From the above 100 8x10's [an amount I can get my head around] produces 0.5 oz of silver. Nicholas O. Lindan, Cleveland, Ohio Give or take very little, by far most projection speed papers contain on average 1.6 grams silver per square meter; 20 8x10s. Total, 8 grams or a 1/4 plus oz per 100. That is if none of the silver has been turned to image silver. Dan |
#7
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Building a small silver recovery unit
wrote in message
Nicholas O. Lindan wrote: From the above 100 8x10's produce 0.5 oz of silver. Give or take very little, by far most projection speed papers contain on average 1.6 grams silver per square meter; 20 8x10s. Total, 8 grams or a 1/4 plus oz per 100. That is if none of the silver has been turned to image silver. Dan Sounds copacetic, I'm sure the silver recovery folks were being as generous as possible ... So, more realistically: 1/8 oz of silver/100 sheets 8x10 [1/2 the silver in the image] 120 8x10 sheets / gallon fix 1 gallon fix / week 50 wks / year = 7.5 oz / year recovered silver at 1 gal/wk of fixer consumption, manufacturer claimed "30 - 50 oz". In any case it stops silver salts from entering whatever it is one's drains empty into. |
#8
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Building a small silver recovery unit
On 31 Jul 2006 15:18:14 -0700,
wrote: Total, 8 grams or a 1/4 plus oz August 1, 2006, from Lloyd Erlick, I'd much rather discuss silver weights in grams. I'm pretty sure the way silver is sold is in Troy ounces, which are equivalent to 20 grams (from memory ...). Then there are the ounces that are sixteen per pound. There must be a poem about grams being grams ... regards, --le ________________________________ Lloyd Erlick Portraits, Toronto. website: www.heylloyd.com telephone: 416-686-0326 email: ________________________________ -- |
#9
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Building a small silver recovery unit
"Lloyd Erlick" Lloyd at @the-wire. dot com,
hailing from the land of the Imperial Gallon wrote: wrote: Total, 8 grams or a 1/4 plus oz I'd much rather discuss silver weights in grams. I'm pretty sure the way silver is sold is in Troy ounces Google pondered mightily spake thus: 1 Troy Oz = 31.10 grams 1 regular folks' ounce = 28.35 grams But you could convince me of most any conversion factor. 1 troy (French) oz = 480 grains = 12 pennyweights 12 troy oz = 1 troy lb. 14.58 troy oz = 1 pedestrian lb. 32.15 troy oz = 1 French Kilogram The English didn't use the metric measuring system because it was invented by the French; America carries on this proud tradition. The troy oz is said to have originated in France and moved to England with William the Conqueror. |
#10
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Building a small silver recovery unit
Well as the one that started this I was far less concerned about whether
it was smart from an economic point of view. For the volumes I do I know its not. The buckets are a pain. I don't have the resources to spend the kind of cash it would take to buy the factory made ones. Those run into the thousands and that investment would be far better spent on a large format Epson 9600 inkjet printer than a recovery system. An electric current pulling metal out of a solution has been around since ancient man. Ancient coins were gold and silver plated,so the current even as small as a dry cell battery should do it. Yes it must be DC, but thats no big deal. I was hoping to find someone that had actually done this before so I don't have to re invent the wheel. Mark |
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