silverpoision
Member
I do silver electroplating and when we wash the electroplated metal into water it has some dragout and the water slowly gets filled with KAgCn2(Silver potassium cyanide). What we currently do to recover the silver from the solution is we put an arbitrary amount of Sodium Sulphide and let the precipitate sediment overnight and the next day we just throw all the excess water into the drain with proper treatment done. Then we dry out the precipitated silver sulphide and then smelt it with an arbitrary ration of Soda ash, Potassium nitrate and borax. Now the question is, although I am able to recover a good amount of silver but the matte stuff left after the smelt is a lot. I really wanted to know how I can properly melt the AG2S and is there any other more efficient way to extract the silver from the silver potassium cyanide solution.