Selamlar. 3 aydır hurda ürünlerinden altını ayırıyorum. Ben genellikle işleyeceğim malzemeye göre 100ml hcl 5ml hno3 kullanıyorum ve hno3'ü üre ile nötralize ediyorum. Bazen dibe ulaşamıyorum. Bu konu hakkında herhangi bir öneriniz var mı?
If ph is lower will the gold be finer as it precipitates and larger powder with higher pH? I've refined only a small amount twice now. Basically after dessolved in aqua regia I filter then only water added is basically what I've used to rinse color through filter. Very little diluting of the acids. Is their an ideal ratio going from stronger acid to digest the gold and solution to drop the gold? Also using HCl nitric acids then dropping with smb. Denoxing hasn't been an issue yet as very little nitric gets job doneI'll assume that when you say you "deactivate" the aqua regia, you mean that you deNOx it, meaning that you eliminate any excess nitric acid. The solution should still be acidic, as there should still be some HCl left.
Although some people recommend raising the pH a bit, having the pH at 1 should not be a problem.
Dave
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