![]() ![]() The information at this website might include opinions or views which, unless expressly stated otherwise, are not necessarily those of the 911METALLURGIST.COM or 911METALLURGY CORP or any associated company or any person in relation to whom they would have any liability or responsibility.Item: 271833812680 Scrap Gold Recovery Kit, 500g Sodium Metabisulfite and 500g Urea. Visitors to the 911METALLURGIST.COM website should not act upon the website’s content or information without first seeking appropriate professional advice.ĩ11METALLURGY CORP accepts no responsibility for and excludes all liability in connection with browsing this website, use of information or downloading any materials from it, including but not limited to any liability for errors, inaccuracies, omissions, or misleading statements. The 911METALLURGIST.COM and 911METALLURGY CORP tries to provide content that is true and accurate as of the date of writing however, we give no assurance or warranty regarding the accuracy, timeliness, or applicability of any of the contents. Strong acid solutions have PH’s that go “below” the standard 1-10 scale, so by the time you neutralized a strongly acidic AuCl solution to a PH of 1.9, it is out of the strong acid range and thus practical for ppt with SMB.ĭISCLAIMER: Material presented on the 911METALLURGIST.COM FORUMS is intended for information purposes only and does not constitute advice. A comment about PH’s as related to strong acid solutions. This procedure consistently yields 65-80% Au with remainders of Pt and Ir. The recovered beautiful yellow AuCl solution is then evaporated to remove excess HNO3 and reconstituted with H2O, monitored with electronic PH /MV meter to ensure a PH of at least “above 1.9” - then finally subject to SMB ppt. Finally, the undisturbed washed-ore - while still remaining in the fritted filter - is then directly subjected to “very hot” AR soln. ![]() Even though using G4 fritted filter, microscopic Au gets through with the boiling water and precipitates on its own in the filtered H2O below. The HNO3-washed ore - while remaining in the fritted filter - is then cleansed with boiling H2O. Our lab works microscopic Au, Pt, Ir recovery from desert ore and our standard procedures follow at least two HNO3 washings through fritted glass micropore filters (so not to wash away microscopic Au particles). Regardless of how much gold might be present in our ore, unless the aqua regia (recommended over HCL & Bleach when dealing with ore rather than jewelry scrap) can freely react with the gold present, we will spin your wheels and get “consistently inconsistent” results that will drive us crazy. Unless we thoroughly wash our ore with nitric acid, we will not be eliminating anything. ![]() Nitric Acid is the only agent that will dissolve salts and base metals without dissolving fairly pure gold. Even though these posts I am commenting on today are 3 years old, people still read and rely on them.Īll of the comments related to Johnny D's question concerning inconsistent results are good - but it is of the utmost importance that we determine the chemical composition of the "ore" AND whether or not Johnny has properly pulverized and cleaned his ore of various natural elements and compounds such as base metals, K+, P+, Mg+ and especially the great interfering and often ignored element Ca+. ![]()
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