Scrap Silver Thread

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Re: Scrap Silver Thread

Postby triple-agent » Thu Dec 23, 2010 12:32 pm

Ziknik wrote:TA,

I think you might get a better finish if you vibrate your mould during/after pouring.

You will need a variable speed sex toy for this. Use it to vibrate the stand where your mould is sitting. I am not joking btw.

Concrete vibrators consolidate freshly poured concrete so that trapped air and excess water are released and the concrete settles firmly in place in the formwork. Improper consolidation of concrete can cause product defects, compromise the concrete strength, and produce surface blemishes such as bug holes and honeycombing. An internal concrete vibrator is a steel cylinder about the size of the handle of a baseball bat, with a hose or electrical cord attached to one end. The vibrator head is immersed in the wet concrete.

External concrete vibrators attach, via a bracket or clamp system, to the concrete forms. There are a wide variety of external concrete vibrators available and some vibrator manufacturers have bracket or clamp systems designed to fit the major brands of concrete forms. External concrete vibrators are available in hydraulic, pneumatic or electric power


lol

as you can see form the pour pic., there are two hollows where voids were not filled quick enough - so yes i think it's time to go and get a king dong mambo no. 5!

also i could probably heat the cast up more as well
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Re: Scrap Silver Thread

Postby fwiw » Thu Dec 23, 2010 12:35 pm

Now that has got to be the funniest thing I have heard all week!

I just can't get the mental image out of mind! And when mrs TA walks in! This is a comedy sketch in the making! Maybe this is the idea smeagol was looking for! Comedy, sex toys and silver - what could be better than that?

Ziknik wrote:TA,

I think you might get a better finish if you vibrate your mould during/after pouring.

You will need a variable speed sex toy for this. Use it to vibrate the stand where your mould is sitting. I am not joking btw.

Concrete vibrators consolidate freshly poured concrete so that trapped air and excess water are released and the concrete settles firmly in place in the formwork. Improper consolidation of concrete can cause product defects, compromise the concrete strength, and produce surface blemishes such as bug holes and honeycombing. An internal concrete vibrator is a steel cylinder about the size of the handle of a baseball bat, with a hose or electrical cord attached to one end. The vibrator head is immersed in the wet concrete.

External concrete vibrators attach, via a bracket or clamp system, to the concrete forms. There are a wide variety of external concrete vibrators available and some vibrator manufacturers have bracket or clamp systems designed to fit the major brands of concrete forms. External concrete vibrators are available in hydraulic, pneumatic or electric power
There is no SPOON deflation.
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Re: Scrap Silver Thread

Postby triple-agent » Sat Jan 29, 2011 2:41 pm

had a go at a melt again last night - but my beginners luck run out; i was able to semi-melt the scrap but it was too viscous to pour (low grade coal for you). Hence, today i bought some expensive but quality 'doubles' because of the greater heat output - it worked a treat, i had the metal able to pour in less than an hour of placing the crucible in the coals.

However, i am learning from my mistakes...... :think:

i should have either, heated up the crucible empty and knocked all the previous melt crud out of it when hot enough OR (more sensibly) poured a series of smaller bars where the last one might of had crud contamination, whereas the previous 3 or 4 would have been fine. Instead i opted for the one bar, with the result that i knocked all of the bottom (of the crucible) remaining crud onto the top of my melt bar!

agghhh! anyway i cleaned up the bar with a belt sander but you can still see the crud contam.

on another note i used very little flux this time - maybe i should have used more?

still better luck next time.....

Image

Image

Image
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Re: Scrap Silver Thread

Postby azazel » Sun Jan 30, 2011 1:25 pm

It looks good. Do you heat the top of the pour and try scraping the dross off the top whilest overfilling the cast?
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Re: Scrap Silver Thread

Postby triple-agent » Sun Jan 30, 2011 2:16 pm

azazel wrote:It looks good. Do you heat the top of the pour and try scraping the dross off the top whilest overfilling the cast?


hi az

the ingot cast i have is 1kg (as is the crucible) so I have never yet had enough metal to overfill. I have noticed that when pouring, most of the sh1te will come out last anyway, so next time i will pour the bar and then pour the last bit out into a separate vessel.

I have also noticed that the graphite crucible are affected by decay, so i will be looking for something better to melt the ag into going forward.

The scrap i am using consists of knife handles, brush backs, etc. so just getting it all into these bars is definitely the way forward. At some point in the future i might re-melt the bars and pour as many 'clean' bars as i can

ps. couldn't help but notice the non-numismatic scrap coinage you are collecting - so this might be future project for you?
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Re: Scrap Silver Thread

Postby azazel » Sun Jan 30, 2011 4:37 pm

triple-agent wrote:
azazel wrote:It looks good. Do you heat the top of the pour and try scraping the dross off the top whilest overfilling the cast?


ps. couldn't help but notice the non-numismatic scrap coinage you are collecting - so this might be future project for you?



I dont really see the point of melting down coins as you know what they are and what the silver content is. When you have a bar it is questionable as to what the silver content is unless you get it assayed and even then most people would rather have a umicore or JM bar.
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Re: Scrap Silver Thread

Postby triple-agent » Sun Jan 30, 2011 5:55 pm

Yes, you're right. I have not smelted any coins tbh
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Re: Scrap Silver Thread

Postby triple-agent » Sat May 21, 2011 10:22 am

2 sterling 1/4 k bars on ebay:

one DIY with no assay cert. struggling to get a bid at £100:

http://cgi.ebay.co.uk/scrap-silver-/270 ... 3f0a0cffef

one hallmarked, with over £200 on the bids so far:

http://cgi.ebay.co.uk/1-4-kilo-250g-925 ... 3a661c4520

moral of the story - if you are DIY melting, get it assayed!
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Re: Scrap Silver Thread

Postby wee Jinky » Sat May 21, 2011 6:19 pm

fantastic work TA ,something I've thought of doing myself
have you considered using Delft clay in place of a mould?
suitable for smaller bars around 1 oz, that way you could incorporate a surface design as part
of the process
I know they sprinkle talc in the impression before pouring
a silver rabbit has suddenly taken on a whole new meaning lol!
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Re: Scrap Silver Thread

Postby triple-agent » Fri Sep 02, 2011 10:10 am

UPDATE:

not melting my own scrap now - birmingham assay office will do it for you + pour bar + issue assay cert

all for a reasonable fee
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Re: Scrap Silver Thread

Postby wee Jinky » Fri Sep 02, 2011 6:03 pm

saw a pile of silver cutlery in the local 2nd hand shop last week
one lot was 8 good sized spoons for €24
I think this could be a very smart way to add to my collection
nipping back tomorrow (hope they're still available)
the umicore recycling plant near Antwerp isnt too far from home
maybe they will offer a similair service to Birmingham
but tbh I would prefer to diy it just for the personal pleasure
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Re: Scrap Silver Thread

Postby triple-agent » Fri Sep 02, 2011 7:33 pm

wee Jinky wrote:saw a pile of silver cutlery in the local 2nd hand shop last week
one lot was 8 good sized spoons for €24
I think this could be a very smart way to add to my collection
nipping back tomorrow (hope they're still available)
the umicore recycling plant near Antwerp isnt too far from home
maybe they will offer a similair service to Birmingham
but tbh I would prefer to diy it just for the personal pleasure


sounds like a bargain, probably .800 if they are european (still a bargain!)

solid spoons are best, beware of hollow filled knife handles with steel blades
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Re: Scrap Silver Thread

Postby wee Jinky » Fri Sep 02, 2011 8:25 pm

thanx forra tips TA ,will be taking my trusty loupe to check for hallmarks
although for silver I find there are so many different versions
They no doubt will be european (I am in Belgium 6 miles from France)
they are all solid and no knives to worry about just spoons and forks
would like to cast ornaments/jewellry in delft clay rather than bars
Shame you have given up, as for fuel I will probably opt for hardwood charcoal
rather than coal as from experience I know how frustrating the wrong type of coal
for a job can be .
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Re: Scrap Silver Thread

Postby wee Jinky » Wed Sep 07, 2011 10:54 pm

cutlery turned out to be plated
marked 40 which I read was 40gms of silver per 12 pieces
there was 27 pieces in total (2.5kgs gross) and they only wanted £40
so I bought them for experimental purposes

on further investigation it doesnt seem that simple a process to recycle them
but if silver has a melting point of 961C
and stainless steel one of 1363C
would a temp of 1250C in a temp controlled kiln
not allow the silver to run off,especially as it would be on the surface of the steel ?
seems to simple -or maybe thats just me
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Re: Scrap Silver Thread

Postby triple-agent » Fri Sep 09, 2011 11:30 am

wee Jinky wrote:cutlery turned out to be plated
marked 40 which I read was 40gms of silver per 12 pieces
there was 27 pieces in total (2.5kgs gross) and they only wanted £40
so I bought them for experimental purposes

on further investigation it doesnt seem that simple a process to recycle them
but if silver has a melting point of 961C
and stainless steel one of 1363C
would a temp of 1250C in a temp controlled kiln
not allow the silver to run off,especially as it would be on the surface of the steel ?
seems to simple -or maybe thats just me



sounds allright to me since the silver is an external plate and not mixed - though i would have an iron gause in the crucible to keep the metals seperate

i am intrigued about the '40' plate mark, is it on each seperate item or on an outside box etc?
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Re: Scrap Silver Thread

Postby wee Jinky » Fri Sep 09, 2011 12:26 pm

24 were marked as 40
2 as 60 and 1 as 90

http://www.925-1000.com/a_platenumbers.html
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Re: Scrap Silver Thread

Postby triple-agent » Sat Sep 10, 2011 12:44 pm

wee Jinky wrote:24 were marked as 40
2 as 60 and 1 as 90

http://www.925-1000.com/a_platenumbers.html



thanks for the link - i have never come across the '40' mark before
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Re: Scrap Silver Thread

Postby warpig » Thu Sep 29, 2011 10:45 pm

Interesting thread. What purity will they refine it to and any idea of the cost? .925 or .999? We have lots of scrap silver around from Mrs Warpig making jewelry. I alway check the 5KG bars to see if she's melted a corner off for her hobby!

triple-agent wrote:UPDATE:

not melting my own scrap now - birmingham assay office will do it for you + pour bar + issue assay cert

all for a reasonable fee
"There can be no other criterion, no other standard than gold. Yes, gold which never changes, which can be turned into ingots bars, coins, which has no nationality and which is eternally and universally accepted as the unalterable fiduciary value par excellence"

"Betting against gold is the same as betting on governments. He who bets on governments and government money, bets against 6,000 years of recorded human history."

Charles de Gaulle
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Re: Scrap Silver Thread

Postby triple-agent » Fri Sep 30, 2011 9:29 am

warpig wrote:Interesting thread. What purity will they refine it to and any idea of the cost? .925 or .999? We have lots of scrap silver around from Mrs Warpig making jewelry. I alway check the 5KG bars to see if she's melted a corner off for her hobby!

triple-agent wrote:UPDATE:

not melting my own scrap now - birmingham assay office will do it for you + pour bar + issue assay cert

all for a reasonable fee



you send them the scrap - they melt it (and take core sample for assay) - pour bar, and give you assay cert of fineness

hence, you send them 925, and this will be the end product

for fact-sheet and submission form go to bottom of page here: http://www.theassayoffice.co.uk/downloads_area.html
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Re: Scrap Silver Thread

Postby warpig » Fri Sep 30, 2011 10:06 am

Thanks TA. What was the "reasonable fee" if you don't mind me asking?

Direct link to Precious Metals Melting Service brochure.
"There can be no other criterion, no other standard than gold. Yes, gold which never changes, which can be turned into ingots bars, coins, which has no nationality and which is eternally and universally accepted as the unalterable fiduciary value par excellence"

"Betting against gold is the same as betting on governments. He who bets on governments and government money, bets against 6,000 years of recorded human history."

Charles de Gaulle
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