Adaptation
Member
- Joined
- Jan 16, 2014
- Messages
- 7
I have some concentrate bound in SiO2 slag, thats not really the point here because I have a smallish sample that has been ultrasonically pulverised to almost a dust consistency so I'm hoping most of the cash is not bound in glass.
I have read up on just about every source I could find about refining using acid. My plan is to dissolve out the non pgm's with sulfuric and later nitric acids in a two step wash to hopefully make collecting the silver easier. Then hit the PGM's and gold with AR and selectively pull out the gold with SO2 the Pt with NH4Cl.
I have a small issue with the iridium, I just don't know if it will dissolve or not. It's 20.4% of my precious metal content. I will have a decent amount of SiO2 left so I can't just assume the andy remainder is iridium. If I get the go ahead to go full scale with the recovery I could use HF to wash the SiO2 out but at that point I could afford to hire a real chemist to help me. I may try to cook the crap out of it with AR or try to use density to separate it (panning or iridium anyone).
On to the real question, I'm not finding much on osmium refining. I know this stuff is hella toxic and I have it in powder form that loves to turn into OsO4 great (-_-') I'm not a real chemist but I know it's supposed to be resistant to AR but I don't know when or how to kick it out of solution or if it will wash away as OsO4 with my early steps. It represents 13.4% of my precious metals. OsO4 melts at 40°c and boils at 130 so perhaps I should try to convert any elemental Os to OsO4 and distill it as a first step before I wash the non platinums out and later convert it to a metallic state.
My non precious has 1% Pb, pritty sure I know how to kick that out of solution and I can sell it but it also has 1% As and I dont know how to kick that out or what to do with it once it's isolated. If I was smart enough perhaps I could make technical grade arsenic sulfides and sell them.
Sorry I drone on too much I really should learn to keep my questions few and simple.
I have read up on just about every source I could find about refining using acid. My plan is to dissolve out the non pgm's with sulfuric and later nitric acids in a two step wash to hopefully make collecting the silver easier. Then hit the PGM's and gold with AR and selectively pull out the gold with SO2 the Pt with NH4Cl.
I have a small issue with the iridium, I just don't know if it will dissolve or not. It's 20.4% of my precious metal content. I will have a decent amount of SiO2 left so I can't just assume the andy remainder is iridium. If I get the go ahead to go full scale with the recovery I could use HF to wash the SiO2 out but at that point I could afford to hire a real chemist to help me. I may try to cook the crap out of it with AR or try to use density to separate it (panning or iridium anyone).
On to the real question, I'm not finding much on osmium refining. I know this stuff is hella toxic and I have it in powder form that loves to turn into OsO4 great (-_-') I'm not a real chemist but I know it's supposed to be resistant to AR but I don't know when or how to kick it out of solution or if it will wash away as OsO4 with my early steps. It represents 13.4% of my precious metals. OsO4 melts at 40°c and boils at 130 so perhaps I should try to convert any elemental Os to OsO4 and distill it as a first step before I wash the non platinums out and later convert it to a metallic state.
My non precious has 1% Pb, pritty sure I know how to kick that out of solution and I can sell it but it also has 1% As and I dont know how to kick that out or what to do with it once it's isolated. If I was smart enough perhaps I could make technical grade arsenic sulfides and sell them.
Sorry I drone on too much I really should learn to keep my questions few and simple.