Hello everybody!
I work to a company that receives alot of galvanic waste. They press filter it then ship to germany, there they recover the copper and nickel in the "galvanic mud".
We are trying to do this process here to reduce costs, what is usually done is to add sodium hydroxide and formaldehyde to reduce it to copper and nickel metal.
We are having some trouble with the reduction, we add more formaldehyde than it's needed (because of this reaction auto-catalytic nature) and when filtering the solution still contains dissolved copper.
The copper and nickel waste is precipitated in the galvanic process with calcium oxide.
Anybody have experience with this process? Do you have a literature to indicate?
Thanks!
I work to a company that receives alot of galvanic waste. They press filter it then ship to germany, there they recover the copper and nickel in the "galvanic mud".
We are trying to do this process here to reduce costs, what is usually done is to add sodium hydroxide and formaldehyde to reduce it to copper and nickel metal.
We are having some trouble with the reduction, we add more formaldehyde than it's needed (because of this reaction auto-catalytic nature) and when filtering the solution still contains dissolved copper.
The copper and nickel waste is precipitated in the galvanic process with calcium oxide.
Anybody have experience with this process? Do you have a literature to indicate?
Thanks!