Refining Question

[irvtemes]

I have three questions which are related that I would like an experts answer............. If a refiner receives a lot 1000 dwt of plumb 14kt wedding bands and melts them into a bar---

question #1 --- what would the after melt weight be? #2 what would the pin sample assay at, percentage of purity? #3 when the bar is refined and the actual gold is recovered, how much will be recovered?

Edited by moderator to remove all bold text

 

[nickvc]

I hope this answers some of your questions.
1. If the weight is lower then the assay on the bar should still produce the same amount of gold so long as the items did not have any dirt , grease , skin stones etc.
2.In the USA manufacturers are allowed I believe 1/2 karat tolerance where as in the UK there is none so I’d bet the USA bands will be below claimed assay.
3. The gold recovered depends on the skill of the refiner even the best will lose a very small amount but it should be recovered at a later date.

 

[Yggdrasil]

I have three questions which are related that I would like an experts answer............. If a refiner receives a lot 1000 dwt of plumb 14kt wedding bands and melts them into a bar---

question #1 --- what would the after melt weight be? #2 what would the pin sample assay at, percentage of purity? #3 when the bar is refined and the actual gold is recovered, how much will be recovered?

Edited by moderator to remove all bold text

Nick has answered your questions, and I have removed the all bold in your text as it is considered shouting.

 

[Anil]

question #1 --- What would the after-melt weight be? A - there always will be a melting loss as some of the base metals such as Zn, Cu, etc., will evaporate and result in melting loss ( generally it could be 1/2 Gm per 1000Gm for non-studded jewellery.
#2 what would the pin sample assay be at, percentage of purity? A- It should ideally have a minimum assay of 58.50%. If melting loss is higher, the assay should be more than 58.50%
#3 When the bar is refined and the actual gold is recovered, how much will be recovered? A - The returnable gold will be anywhere between 0.5% to 2% less than the refinery assay report depending on which one you choose to go to.

 

[irvtemes]

your rely is very vague ............the answer should be the same every time...........what are those answers?

 

[Yggdrasil]

your rely is very vague ............the answer should be the same every time...........what are those answers?

No batches are the same.
Different tolerances on each item and similar might skew the result.
Melting time and temperatures will do the same

 

[Asif Lahori]

Hello
I want to talk with gold refine expert. Please contact

 

[Yggdrasil]

Hello
I want to talk with gold refine expert. Please contact

Welcome to us.
What is your question?

 

[Asif Lahori]

Welcome to us.
What is your question?

I have gold sand and want to extract gold.....

 

[Yggdrasil]

I have gold sand and want to extract gold.....

Have you had an assay done?

 

[4metals]

Hello
I want to talk with gold refine expert. Please contact

Maybe I should have a cup of coffee before answering this but here goes.

Nobody here has a crystal ball and can tell you anything about what you have or don't have or think you have without details. Asif has joined the forum, today in fact, and has not specified any details about his gold laden sand, yet he expects someone here to contact him and tell him everything he needs to know to extract this gold, make himself a fortune, and leave the forum once he is satisfied. I don't think so.

A better opening statement would be hi my name is Asif and I have found some sand which I suspected to have gold in it. I paced off the area that has this type of sand, by appearance, and made a grid and sampled a shovel full of sand from each of the X sample points. The samples were well mixed and I sent them off to an assay lab which reported the sand indeed has gold and the concentration is X oz per ton. What is the most economical way to concentrate these values?

If Alif's opening question was as I just suggested, he would receive a tremendous amount of useful information about leaching and further sampling to get the most payout from his find. And I might add, none of it would cost him a penny. But as he posed his question, he will get very little, if any useful information.

Now, as @galenrog would say, "time for coffee"

 

[anachronism]

Maybe I should have a cup of coffee before answering this but here goes.

Nobody here has a crystal ball and can tell you anything about what you have or don't have or think you have without details. Asif has joined the forum, today in fact, and has not specified any details about his gold laden sand, yet he expects someone here to contact him and tell him everything he needs to know to extract this gold, make himself a fortune, and leave the forum once he is satisfied. I don't think so.

A better opening statement would be hi my name is Asif and I have found some sand which I suspected to have gold in it. I paced off the area that has this type of sand, by appearance, and made a grid and sampled a shovel full of sand from each of the X sample points. The samples were well mixed and I sent them off to an assay lab which reported the sand indeed has gold and the concentration is X oz per ton. What is the most economical way to concentrate these values?

If Alif's opening question was as I just suggested, he would receive a tremendous amount of useful information about leaching and further sampling to get the most payout from his find. And I might add, none of it would cost him a penny. But as he posed his question, he will get very little, if any useful information.

Now, as @galenrog would say, "time for coffee"

Or something stronger.....

 

[galenrog]

“Time for more coffee” is a term I learned about fifty years ago when my first shop supervisor in the military used it when he had had enough of the conversation. At least for a while. The only area I have ever heard it used was that tiny corner of North Carolina. Even today, when I visit that area, particularly the Marine Air Station at Cherry Point, I will hear it from time to time.

Time for more coffee.

 

[4metals]

I used it apologetically to excuse a lack of patience on my part from being tired. But Jon was right, something stronger may have been in order.

 

[galenrog]

I used it apologetically to excuse a lack of patience on my part from being tired. But Jon was right, something stronger may have been in order.

True.