I agree.nickvc said:At no point do I feel I treated Yash with disrespect or shabbily,
nickvc said:At no point do I feel I treated Yash with disrespect or shabbily, my intention in the replies I gave was to try to get him to understand the processes and reactions he was going to have to deal with.
GSP eventually posted about recovery and refining from a cyanide solution, that bears no resembalance to the first material discussed or even the second material, has this been abandoned as in the one test done Yash stated he had no gold powder in his nitric solution, to me this points to the fact there was no gold in there in the first place, hence my suggestion to read and learn testing techniques and procedures as well as what acids will dissolve what metals and leave others unaffected.
Refining is not something I believe to be taken lightly, we deal with dangerous and deadly chemicals and gases and with cyanide thrown into the mix we have a real recipe for disaster to strike very easily and without warning with fatal results for all in the vicinity.....
I hope Yash is as competent as he claims with chemicals and has read many books so that whatever he tries doesn't end in injury or worse.
The help available here on the forum is outstanding and the information even more so considering it's all free so for all reading this please use your time wisely and do the necessary reading to keep you, your family, neighbours and environment safe and recover your values and refine them successfully.
GSP said:NOTE#1: On the initial problem on processing the alloy (10Au, 10Ag, 70Cu, 5Fe, 5Zn or Pb). As 4metals and others have said, everything on this list, except the gold, will dissolve in 50/50 nitric acid. The only possible problem I see is that, with the gold at 10%, some of the remaining gold might be colloidal. This can cause settling and/or filtering difficulties. With all that copper, zinc, and silver in it, the reaction will probably generate enough heat to dissolve most of it. At the end, however, I would transfer the undissolved solids (gold, mainly) to a beaker, add a little fresh 50/50 nitric, and heat it to dissolve that last bit. Filter and rinse the solids and put them through the aqua regia process to purify the gold.
If you did dissolve the base metals and silver completely in nitric and, if no brownish powder (gold) remained after doing so, that means that there was no gold in there to start with. I am assuming no chlorides were present.
how can i wash my ppt?nickvc said:Yash I believe Martyn may well have given you the answer you need but I would suggest adding a good rinsing cycle to your precipitated gold powders. Harold,s method is very good and will remove many contaminants from your powder including any silver chloride that gets through.
Here is one such post by Harold;nickvc said:Yash I'm sorry I'm not good with computers so I'm not been awkward when i suggest use the search function and look for Harold V and rinsing methods, Snip
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