Fixer solution waste

Gold Refining Forum

Help Support Gold Refining Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Topekole

Member
Joined
Nov 24, 2018
Messages
11
Hi Everyone,
Please as a new bee i seek help and advice from anyone here who has experienced extracting silver from fixer solution waste from colour seperation lab (Printing).
Please i will really appreciate it if illustrated with pictures for better understanding.
Thanks
 
Did you try entering the question in the search? Sometimes a few words there gives many answers.

GRF Search fixer solution:
https://goldrefiningforum.com/phpBB3/search.php?keywords=fixer+solution
Using different words in the search will also lead to many more results.
 
Topekole said:
Hi Everyone,
Please as a new bee i seek help and advice from anyone here who has experienced extracting silver from fixer solution waste from colour seperation lab (Printing).
Please i will really appreciate it if illustrated with pictures for better understanding.
Thanks

Hi! The easiest way (in my opinion) to get silver from the bleach - fixing: the solution should have a pH=6,5 - 7,5 (for this use Na2CO3 and paper strips litmus - indicators, or better electronic pH - meter), then add sodium hydrosulfite (sodium dithionite) 4 grams per 1 gram of silver contained in the solution. In 24 hours, all the silver will sink to the bottom.
 
Powered zinc will also drop the silver, or you could just stick in a clean copper buss bar or clean copper plate and let time do it's thing.

A electrolytic recovery unit made for the process is the best way to get most of the silver and the flake it produces is almost pure silver.

Depending on how much blix, (bleach/fixer) you have to deal with will determine your investment options.

You do realize that fix from color paper processing contains a very small amount of silver?
 
https://www.youtube.com/watch?v=eHFatJtXAZ0

Color process silver value about 1 gram per liter. If wastes separate ( W1 and W2). Waste 2 silver value 1.4 to 4 gram per liter.
 
Elektrikis said:
https://www.youtube.com/watch?v=eHFatJtXAZ0

this is a classic method of about 100 years :D in the video, as the anode need to use carbon rods from arc of aerodrome floodlights or from the welding machines of metal, or something. The carbon anode, unlike the metal one, has no corrosion.
 
rickbb said:
...You do realize that fix from color paper processing contains a very small amount of silver?
...

if the bleach - fixer goes without stabilizer, about 2 grams of silver per liter, otherwise just 0.6 grams per liter.
 
http://www.pnwx.com/Equipment/DarkEquip/Rotex/MicroMix/

An automated unit if you are planning on having a continues supply of fix to process.
 
Back
Top