The assay / refining lab.....second time around

[HAuCl4]

Just bumping a very useful thread with great information. 8)

And I thought I knew this stuff before I came here...humbling experience...

 

[goldsilverpro]

And I thought I knew this stuff before I came here...humbling experience...

No kidding!! Many of us who thought we knew it all have gone through the same thing and crow definitely has a bitter taste. This field is so vast and varied that no one on the planet knows everything about it, and never will. I know that I learn something on here every day, but it took me about 6 months to admit it.

 

[Barren Realms 007]

And I thought I knew this stuff before I came here...humbling experience...

No kidding!! Many of us who thought we knew it all have gone through the same thing and crow definitely has a bitter taste. This field is so vast and varied that no one on the planet knows everything about it, and never will. I know that I learn something on here every day, but it took me about 6 months to admit it.

A true leader is one that admits to himself he does not know every thing and is willing to ditch thier ego and learn from others.

 

[golddie]

http://goldrefiningforum.com/phpBB3/viewtopic.php?f=41&t=4789

if you look at the picture with the glass reactor there are 3 places made on top of it for openings
1 is used for the fumes to go out
another one for adding AR and other acids or inserting the tube for precipitating with Sulphur dioxide
then why have 3 openings

 

[4metals]

Because 3 neck heads are standard, usually off the shelf items so they're cheaper.

I have never gassed the gold in one of these reactors, they have to be filtered first so I just filter the acid into another container to gas it. Plus open top containers are easier to clean out.

 

[PreciousMexpert]

Tubes to connect the reactor to the fume hood
I bought some tubes from my hardware store and I see that they are too rigid for this job.
Where else would I be able to find these locally

 

[gold4mike]

Our local Tractor Supply Company store has a large selection of tubing sizes and fittings. They sell to farmers for use in applying chemicals.

 

[Refiner232121]

http://www.usplastic.com/catalog/default.aspx?catid=571&parentcatid=856
Can someone say which is the right kind for our needs

 

[golddie]

I was at the pet shop and I saw tubes that were flexible but the were black and you cant see the inside the tube

 

[Barren Realms 007]

http://www.usplastic.com/catalog/default.aspx?catid=571&parentcatid=856
Can someone say which is the right kind for our needs

I would stay away from this one "Steel Wire Reinforced PVC Tubing". The others should be ok for you to use.

 

[golddie]

These dont look like they have stoppers but I am giving a thought about buying one
Also how would I attach the tube to the flask

http://cgi.ebay.ca/3-neck-Flat-bottom-boiling-flask-24-40-500ml-angled-/290463663097?pt=LH_DefaultDomain_0&hash=item43a0fbc3f9

There is the problem of emptying the gold once the nitric acid has removed the base metals

 

[Barren Realms 007]

These dont look like they have stoppers but I am giving a thought about buying one
Also how would I attach the tube to the flask

http://cgi.ebay.ca/3-neck-Flat-bottom-boiling-flask-24-40-500ml-angled-/290463663097?pt=LH_DefaultDomain_0&hash=item43a0fbc3f9

There is the problem of emptying the gold once the nitric acid has removed the base metals

You can probably find glsss or rubber stopper to attack the tube of get a tube large enough to slip over the neck.

Either keep the solution inside the flask or tip it on it's side to remove the soution.

 

[4metals]

Those fittings are standard female tapered joints, there are many types of different male joints to fit into them. Check a scientific glass catalog.

 

[golddie]

Would this be a cover for those holes
http://cgi.ebay.ca/24-40-19-38-Bushing-Adapter-Premium-lab-glassware-/370448472456?pt=LH_DefaultDomain_0&hash=item5640731988
24/40 to 19/38 Bushing Adapter Premium lab glassware

 

[4metals]

That is not a plug it is a reducer but you are on the right track. You want something to go from the taper, which appears frosted because it is frosted glass, to a piece of glass tube on to which you can clamp a hose.

 

[etack]

dose anyone have the bullion spreadsheet that 4metals downloaded the link is not working

It is on the third page at the top

thank

Eric

 

[4metals]

If no one has it, let me know, I don't have that one any more but I can whip you up one to do what you need if you just give me the details.

 

[morisy]

bullion assay calc Au Ag.xls so , can any one give me it .........
thank for all

 

[Richard NL]

May 3rd, 2009, 10:56 pm

For this reason I feel strongly that any serious assayer should have a bookshelf with books on classical fire assay at his or her disposal. I've been fortunate to have on my shelves the following books, all well worn, and all providing a well needed direction from time to time.

Fire Assaying by Shepard & Dietrich

https://www.scribd.com/doc/266406200/Fire-assaying-Shepard-Dietrich

Analysis of Noble Metals by Beamish & Van Loon

https://www.scribd.com/doc/266407163/Analysis-of-Noble-Metals

The Metallurgy of Gold by Sir T.K. Rose

https://www.scribd.com/doc/256693871/Rose-The-Metallurgy-of-Gold-Third-Edition

A Textbook of Fire Assaying by Bugbee

https://www.scribd.com/doc/266494531/A-Textbook-of-Fire-Assaying

The Sampling & Assay of the Precious Metals by Smith

https://www.scribd.com/doc/266497384/The-Sampling-and-Assay-of-the-Precious-Metals

and finally Practical Assaying by Mitchell I have a 5th edition printed in 1881, it has a terrific section on blowpipe assay techniques.

https://www.scribd.com/doc/266499463/A-Manual-of-Practical-Assaying

 

[Palladium]

Library?