The recovery of gold from refractory ores by the use of carbon-in-chlorine leaching This process opens the possibilities of maximizing Au grade and recoveries in a muti-Au carrier and low grade refractory gold ore where low recoveries are common. Two-step floatation and part of middling combined to the floatation tailing for gold leaching process resulted in high gold grade (g.t-1) and gold recovery (%) for this refractory gold ore. The present work describes an experimental study on the effect of traditional parameters (such as grinding fineness and reagent regimes), middling processing method and flowsheet construction on the total recovery and the assay of the floatation concentrate. by a mineral liberation analyser were used for mineralogical characterization study of this ore. Mineral liberation analysis, scanning electron microscopy, element phase analysis and etc. Y.ĭetailed mineralogy and beneficiation and leaching study of a muti-Au carrier, low grade refractory gold ore from a beneficiation plant in Henan Province, China, was investigated. The results well indicated the applicability of CGA to upgrade the refractory gold ore.īeneficiation and leaching study of a muti-Au carrier and low grade refractory gold ore The elemental analysis of gold and sulphur explained their relationship with gold recovery. More than 20-60 times grade increase from the head grade was obtained with CGA-flotation. The results showed that the higher gold grade and recovery were achieved by applying the CGA-flotation, compared with the flotation without CGA. In addition, the flotation without CGA was performed under the same condition for comparison. The ore with the grade of 2-5 g/t was tested with the CGA-flotation process in six different size fractions from 38 to 300 urn using different collector types and dosages. This study aimed to investigate the applicability of coal-oil gold agglomeration (CGA) assisted flotation to recover gold from a refractory ore. Flaskīecause of the winds tonight, I had to pause my work but hopefully I can keep working on it tomorrow.Coal-oil gold agglomeration assisted flotation to recover gold from refractory ore I performed a Stannous Chloride test and it came out very black which I'm assuming is a good sign but how should I get rid of the white residue? Am I correct in assuming it is SMB remnants and if so, will repeatedly filtering it a few times get rid of it? It seemed to survive my first filter from a regular beaker to my E. Update: I did boil it down and re-added HCL and the color has turned into a dark yellow gold, but the white residue is also present at the bottom of the beaker. I filtered it again and put a cap of my beaker for the night, but do I need to buy some Urea to help kill any excess Nitric acid? If so, does anyone have any advice on how to add it to the solution and what colors I could expect to see? I added several spoonfuls of SMB and after a few hours, I still see no dark gold dust but there was a lot of white residue, which I assume is unspent SMB floating around. I did a lower proportion to start, covering everything with ~800 ml of Hydrochloric Acid and topping off to 1000 ml with Nitric. I'm thinking I had too much Nitric acid in my Aqua Regia step.
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