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Reduction of lime consumption when treating refractory gold ores or concentrates Download PDF Info Publication number US20060133974A1. ... 2005-10-11 Priority to US11/249,120 priority patent/US7604783B2/en
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Gold-containing ores, having refractory sulfidic matter or a combination of refractory sulfidic matter and refractory carbonaceous matter, are processed to recover their gold values. The process...
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ALBION PROCESS FOR TREATMENT OF REFRACTORY ORES Duncan Turner (Core Resources) Mike Hourn (Xstrata Technology) 2 ... to breakdown sulphide minerals (e.g. pyrite) to make refractory gold available for cyanide leaching Stirred Mills Feed P 80 ~75 µm Product P 80 10-12 ... Australian Patent No. 700850 (Acid Albion Process) Australian Patent No ...
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The invention relates to hydrometallurgy of precious metals and can be used for the extraction of gold from refractory ores and concentrates. ... Method of extracting gold and silver from an ore . United States Patent 4438076 is at most 0.7 at 25 bar and 0.7 g/l NaCN and is lower at higher pressures whereby said element is leached from said ore ...
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Microbial pre-treatment of double refractory gold ores Download PDF Info ... 2008-11-24 Priority to US12/277,046 priority patent/US20090158893A1/en 2009-02-13 Assigned to BARRICK GOLD CORPORATION reassignment BARRICK GOLD CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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The aim of this research is to investigate the possibility that the natural oxidation of pyrites in stockpiles of refractory gold-bearing materials may facilitate gold recovery without pre-treatment. To solve this problem, pyrite oxidation under stockpile conditions was studied and two models were developed to predict the level of pyrite ...
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The oxidation process is particularly used in the separation of metals from ores in which after oxidation leaching agents including bromide and chlorine compounds are added to the mixture during the recirculation over the raceway to leach the metals in soluble salts from the ... Patent. 5529606. Priority. Oct 28 1994. Filed. Oct 28 1994. Issued ...
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extraction was complete, the amount of extracted gold from the ore was measured. It was found that the alkaline earth metal hydroxides solutions of the invention, magnesium hydroxide in particular, provide good gold recovery with oxide refractory ore at very low thiosulfate and copper cations concentration of only 0.02 to 0.01M and 0.4 to 0.2 mM
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This patent is part of a group of four different patents/applications covering all aspects of the gold extraction and recovery technology. About Dundee Sustainable Technologies, a company controlled by Dundee Corporation. DST is engaged in the development of technologies for the treatment of refractory ores containing sulfides and arsenic.
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There is a solution. Non-destructive testing (NDT) techniques inspect or monitor the condition and deterioration of mechanical and structural assets without damaging the assets themselves. In many cases, NDT techniques can also be applied without disrupting normal operations. NDT has a wide range of benefits, including accident prevention ...
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A method is disclosed for leaching a gold ore which is refractory due to the presence of sulphide minerals of arsenic and antimony. The ground ore is leached with cyanide in a pipe reactor at a pressure of between 5 and 8 MPa. The terminal pH value of the pulp is controlled to be 10 or less than 10. ... 1985-12-17 Publication of US4559209A ...
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Total gold recovery of 92.1% achieved in our first testwork in the high-grade composite samples of 10 g/t Au, after flotation concentrate, pressure oxidation (POX), and cyanide leach. Excellent gold assays reporting up to 98.8% of gold in the flotation concentrate with close to 7% sulphide content. Results provide Gold Terra with two potential ...
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EnviroGold Global Files Patent for Increased Recovery of Precious, Critical & Strategic Metals from Refractory Mine Tailings. Stockhouse use cookies on this site. By continuing to use our service, you agree to our use of cookies. Cookies are used to offer you a better browsing experience and to analyze our traffic.
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