us5104445a process for recovering metals from refractorythe present invention is a process to recover metals from refractory ores. it involves the chlorination of an ore concentrate in the presence of solid salt at a temperature between 300° and 650° c. thereafter, an oxidation step can be used to convert iron chloride to iron oxide. subsequent separation steps remove the salt, gangue, and iron oxides.g extraction overviewrefractory g processeshistorytypes of oreconcentrationleachingg smeltingg refining and parting
a "refractory" g ore is an ore that has ultra fine g particles disseminated throughout its g occluded minerals. these ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. these refractory ores require pretreatment in order for cyanidation to be effective in recovery of the g. a refractory ore generally contains sulfide minerals, organic carbon, or both. sulfide minerals are impermeable minerals that occlude g particles, making it difficult for the leach s · text under ccbysa licenserefractory g technologyrefractory g technology sherritts refractory g technology is used to recover g from refractory sulphide feedstocks. many g ores and concentrates contain fine grained g locked within sulphide minerals, such as pyrite and/or arsenopyrite, unavailable forrefractory g ores challenges and opportunities for amar 23, · mar 23, · why refractory ores are growing significantly higher grades should continue to offset higher costs per metric ton in the near future. our analysis of recently developed and planned g projects for refractory and nonrefractory ores found that capital costs per metric ton of ore capacity are higher in refractoryore projects.chlorination leaching of refractory ores hydrometallurgynichromet both has a process that uses chloride and bromide to leach g from refractory ores high in sulphides. i also suggest you look at papers by dr. corby anderson that use alkaline sulfide leaching to extract g from refractory ores. the latter can be run atrefractory ore chemistry britannicaother articles where refractory ore is discussed g processing extraction from refractory ores many gbearing ores and concentrates are not readily amenable to cyanidation, owing to the presence of substances that consume the cyanide reagent before it can dissolve the g, preferentially adsorb the g as it dissolves (a phenomenon called pregrobbing), or completely surround theprocedure for extraction of g from refractory clay orethe method of extraction of g from refractory ores clay, including grinding, classificats the yu, regrinding and cyanidation, characterized in that for the process intensification and reduction of losses of g classified ore with a grain size of 0.5 mm is subjected to repeated grinding, which lead to the solution neinogennye surfactant to the formation of the silt fraction of 0.0.05 mm, which is subjected toestimated reading time mins
complex ore bodies challenge to extract g fromrefractory is a term that has been misused in the past to describe only a situation where the g recoveries are less than 90%. however, refractory has also been used as a term to describe g enclosed or locked in other minerals and uneconomic to extract. so overall, refractory ore means that it will not be easy to extract the g forrebellious ores sulfides, selenides and telluridesrebellious ores sulfides, selenides and tellurides. the early day miners feared it, and it happened a lot more often than they would have liked the easily worked rich surface ores they discovered on the surface gave way as they mined downward, to a vein full of sulfides, base metals and other nasty, rebellious and refractory ores.g extraction g extraction refers to the processes required to extract g from its ores.this may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore.. g mining from alluvium ores was once achieved by techniques associated with placer mining such as simple g panning and sluicing, resulting in direct recovery ofextraction methods from refractory oresextraction methods from refractory ores nov 10, a method for extracting and separating g, silver, copper, zinc and/or lead from an arseniccontaining ore, concentrate or tailings characterized in that the extraction is carried by roasting in the presence of a calciumcontaining material and at least one of an alkali metal halide andlookwayuponline dictionaries translation dictionary english dictionary french english english french spanish english english spanish portuguese english english portuguese german english english german dutch english english dutchactinide uranium is extracted from its ores in various ways. in one method, the ore is burned and then reacted with nitric acid to convert uranium into a dissolved state. treating the solution with a solution of tributyl phosphate (tbp) in kerosene transforms uranium into an organic form uo 2 (no 3) 2 (tbp) 2.refractory g ore treatment methodsjul , · metallurgical contentg leaching processing of arsenic oremispickel (arsenopyrite feass).6leaching and recovering g from antimony mineralsstibnite (antimony sulphide, sb2s2)telluride g ore processingsolubility of telluridesg extraction from carbonaceous orelist g refractoryrefractory g ore treatment methodsjul , · g leaching processing of arsenic ore. mispickel (arsenopyrite feass).6. leaching and recovering g from antimony minerals. stibnite (antimony sulphide, sb2s2) telluride g ore processing. solubility of tellurides. g extraction from carbonaceous ore. list g refractoryestimated reading time 9 mins
extraction methods from refractory ores tcmextraction methods from refractory ores . united states patent application 256260 . kind code a1 . abstract a method for extracting and separating g, silver, copper, zinc and/or lead from an arseniccontaining ore, concentrate or tailings characterized in that the extraction is carried by roasting in the presence of a calciumus5328669a extraction of precious metals from ores andplatinum group metals, g and silver are extracted from complex ores, automobile scrap, refractory ores and as naturally occurring by leaching the precious metal containing materials with a solution containing halogen salts such as potassium or sodium iodide and bromide in the presence of ammonium ions and oxygen. the precious metal containing materials and reactants are charged into aa selective process for extracting antimony frommay 01, · refractory g ores are defined as minerals for which the cyanideleaching recovery of g is < 80%, even after fine grinding. higharsenic refractory g ores constitute the largest reserves but are the most difficult from which to extract g. g leaching recoveries can often be as low as 50% . these poor results can be attributed tocited by extraction method for refractory precious metal orecyanic extraction of precious metal from comminuted, refractory precious metal ore as well as refractory precious metal concentrates and tailings from such ore is effected with rapidity and high yield by agitationally treating the refractory material with an aerated, alkaline solution containing a high concentration of water soluble cyanide and a low concentration of chemical oxidizer such asus5328669a extraction of precious metals from oresplatinum group metals, g and silver are extracted from complex ores, automobile scrap, refractory ores and as naturally occurring by leaching the precious metal containing materials with a...cited by 53procedure for extraction of g from refractory clay ore1. the method of extraction of g from refractory ores clay, including grinding, classificats the yu, regrinding and cyanidation, characterized in that for the process intensification and reduction of losses of g classified ore with a grain size of 0.5 mm is subjected to repeated grinding, which lead to the solution neinogennye surfactant to the formation of the silt fraction of 0.0.05the method of extraction of g from refractory ores and(57) abstract the invention relates to a hydrometallurgical methods for extracting g, namely the way the oxidative opening refractory ores. the proposed method comprising the oxidative opening of the ore with an aqueous solution of sulfuric acid and nitric acid in the presence of oxygen, is that simultaneously with the oxidative opening of the ores carry out the dissolution of g, fordredging dredging is the excavation of material from a water environment. possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine life having commercial value.