can nitric acid extract gold from sulfide ore





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Gold Parting using Nitric AcidThe process of parting gold with nitric acid is old, and probably dates from the discovery of nitric acid itself; it is one of the simplest parting processes, and does not require a costly plant or much manipulative skill The main objection to it is the cost of the ac The operation comprises the preparation of ,...know more

EXTRACTING METALS FROM SULFIDE ORES - Investors HubMost sulfides are electrically conducting, generally semiconducting, and this allows electrochemical reactions to occur at the solid/solution interface In fact, electrochemical mechanisms play a key role in each of the processes that are involved in obtaining the component metals from their sulfide ores, namely, prospecting for ores (weathering ....know more

Rebellious Ores: Sulfides, Selenides and TelluridesInterested in solving the difficulties of dealing with rebellious ores and recover their gold and silver? Many types of valuable ores contain Sulfides, selenides or tellurides and they can make processing these ores more difficult Recognizing these minerals can help us understand and find gold ,...know more

Copper extraction - WikipediaAs with oxide ores, solvent extraction and electrowinning technologies are used to recover the copper from the pregnant leach solution Supergene sulfide ores rich in native copper minerals are refractory to treatment with sulfuric acid leaching on all practicable time scales, and the dense metal particles do not react with froth flotation media...know more

Gold Extraction Of Nitric Acidcan nitric acid extract gold from sulfide ore can nitric acid extract gold from sulfide ore , extract gold with nitric acid isisconsultingorg Nickel Ore can be divided into copper sulfide nickel Phosphorite Flotation Equipment Production Line According to different , extract gold with nitric ac Get Information...know more

How to Refine Gold With Nitric Acid | SciencingMay 23, 2018· Though gold is valuable, the most common sources of gold are rarely pure Whether it is freshly mined gold ore or a refined gold used in jewelry, contaminants and unwanted minerals are usually present Nitric acid can be used to refine gold, but you must be careful during the process...know more

Copper extraction - WikipediaAs with oxide ores, solvent extraction and electrowinning technologies are used to recover the copper from the pregnant leach solution Supergene sulfide ores rich in native copper minerals are refractory to treatment with sulfuric acid leaching on all practicable time scales, and the dense metal particles do not react with froth flotation media...know more

(PDF) Nitric Acid Leaching for Pre-Treatment of a Copper ,The nitric acid pre-treatment improved the extraction of gold and silver in subsequent cyanide leaching (15 g/L NaCN) to 82% Au and 875% Ag with a concomitant decrease (up to 54%) in cyanide ....know more

HOME >>Product >>nitric acid in gold ore processingApr 1, 2017 After nitric acid pretreatment, the extraction of gold and silver from both materials substantially improved with almost complete leaching of gold nitric acid vs concentrated heavies (ore concentrates) YouTube May 21, 2017 This is a nitric acid reaction with heavy sand ore concentrates collected while sluicing I found the action ....know more

extraction of copper from sulphideExtracting copper from other or Copper can be extracted from non sulphide ores by a different process involving three separate stages Reaction of the ore (over quite a long time and on a huge scale) with a dilute acid such as dilute sulphuric acid to produce a ,...know more

Accelerating Copper Leaching from Sulfide Ores in Acid ,Accelerating Copper Leaching from Sulfide Ores in Acid-Nitrate-Chloride Media Using Agglomeration and Curing as Pretreatment , nitrate ions that can come from nitric acid, an alkaline metal ....know more

Best and Easiest way to refine gold dust to get 999% purityBest and Easiest way to refine gold dust to get 999% purity Home FAQs , 70% of copper and some percentage of zinc and lead in it Can you tell the process for extracting gold from the metal? Yash Vyas - India March 5, 2012 , You have to add three times silver of your any karat gold Dissolve it in nitric acid until all silver dissolves ....know more

silver refining with nitric acid - Gold Refining ForumOct 19, 2012· You also mention recovery of free gold (so I would also assume there to be gold locked up in the iron sulfide\ore also Valuable sulfide can be froth floated in oils and air as a recovery method, if using this method you would want to concentrate them as sulfide before roasting, silver sulfide can also be concentrated using this method as well ....know more

US2805936A - Leaching of arsenide ores - Google PatentsA wide range of sulfuric acid-nitric acid ratios and concentrations have been observed Quite surprisingly, effective results are only obtained when the nitric acid concentration in the leach liquor is from about l5% and there is a markedly definite preferable range ,...know more

processing gold ore with nitric acidWhile nitric acid alone can dissolve some unwanted minerals (such as pyrite) from gold ore, it is unable to penetrate large gold bodies or refine relatively pure gold Aqua regia a mixture of nitric acid and hydrochloric acid can dissolve gold itself, allowing pollutants to be filtered off so that very pure gold can ,...know more

How to Extract Silver from Ore at Home by , - YouTubeMay 18, 2016· Here is How to extract silver from ore at home Roasting Silver Ore begins with crushing the ore, then roasting off the sulphides, tabling it and finally, smelting inside the KK-6 ,...know more

Oxidative Hydrometallurgy of Sulphide MineralsOxidative Hydrometallurgy of Sulphide Minerals F R Carrillo-Pedroza, M J So ria-Aguilar, E Salinas-Rodríguez, , iii in nitric acid solutions 3FeS2 + 18HNO 3 = Fe 2(SO 4)3 + Fe(NO 3)3 + 3H 2SO 4 +15NO + 6H 2O (6) , The oxidation of sulfide ores by ozone can occur by dissolution of sulfide ,...know more

Gold Parting using Nitric AcidThe process of parting gold with nitric acid is old, and probably dates from the discovery of nitric acid itself; it is one of the simplest parting processes, and does not require a costly plant or much manipulative skill The main objection to it is the cost of the ac The operation comprises the preparation of ,...know more

Sulfides - Gold Recovery Methods - ICMJ's Mining Journal ,Sep 04, 2015· Most sulfide ores are processed by flotation Depending on the ore, gravity methods can produce a fair concentrate - not as good as flotation The problem with sulfides is extraction of values - Most extraction of sulfides is by smelting There are no smelters in the US accepting custom ores that I know of (Thanks EPA, now we are dependent on ....know more

EXTRACTING METALS FROM SULFIDE ORES - Investors HubMost sulfides are electrically conducting, generally semiconducting, and this allows electrochemical reactions to occur at the solid/solution interface In fact, electrochemical mechanisms play a key role in each of the processes that are involved in obtaining the component metals from their sulfide ores, namely, prospecting for ores (weathering ....know more

Smelting high grade lead-silver ore [Archive ,Let's see, you could, powder the ore to start, then roast it (heat it to redness on a piece of sheetmetal until no more sulfur burns off beware of the fumes), then extract with nitric acid giving a solution of lead and silver nitrates, then precipitate the silver with some muriatic acid (HCl) Add it ,...know more

EXTRACTING METALS FROM SULFIDE ORESBiochemical oxidation of the sulfide minerals releases the gold and allows it to be leached by the chemicals used in conventional gold leaching Biochemical processes are being developed for the treatment of copper, nickel and cobalt sulfide ores and are expected to become the major method for recovery of these metals in the future...know more

Gold Extraction Of Nitric Acidcan nitric acid extract gold from sulfide ore can nitric acid extract gold from sulfide ore , extract gold with nitric acid isisconsultingorg Nickel Ore can be divided into copper sulfide nickel Phosphorite Flotation Equipment Production Line According to different , extract gold with nitric ac Get Information...know more

gold recovery sulfuric acid - educationcareinSulfuric acid leaching of Igarapé Bahia gold-copper ore for , - refdoc Sulfuric acid leaching of Igarapé Bahia gold-copper ore for copper extraction: An ore pretreatment for gold recovery by cyanidation Auteur(s) / Author(s) More details » Get Price...know more

Silver processing | BritannicaA process routinely employed in the fire assaying of gold ores is the addition of silver prior to fusion of the ore in order to ensure that the silver content of the final bead is high enough to dissolve This is called inquartation, and the separating of silver and gold by leaching with nitric acid is referred to as parting...know more

REFINING-RECOVERY AND REFINING WITH JUST NITRIC ACID ,how can you refine with just nitric acid? the answer is simple, nitric acid or our nitric substitute acid will desolve all metals except for gold some platinum group metals (platinum,rhodium,etc) may not desolve this is not an issue because if you sort your materials properly you will not have any platinum group metals in the mix...know more

ON THE ISSUE OF GOLD EXTRACTION FORM PERSISTENT SULFIDE ORESThe technology of preparation of such ores for cyanidation based on the oxidation with nitric acid results in the escape of large amount of sulfur which significantly reduces the gold extraction into the solution in the course of cyanidation The technology of pressure oxidation of sulfide ores is related to high capital and operational costs...know more

CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING ,gold recovery However, cyanidation after dissolving the ore sample in hydrochloric acid (HCl), sulfuric acid (H 2 SO 4), ferric chloride (FeCl 3) and nitric acid (HNO 3), re-spectively, increased the gold recovery to 981% This shows that the ore is a sulfide refractory gold ore (Saba et al, 2011)...know more

Procedure for processing sulphide gold containing arsenic ,FIELD: metallurgy SUBSTANCE: invention refers to procedure for processing sulphide gold-containing arsenic-antimonous concentrates or ores and can be implemented at extraction of gold and antimony from poly-metallic sulphide concentrates and ores, mainly with ingrained fine dispersed gold...know more

EXTRACTING METALS FROM SULFIDE ORESSulfuric acid...know more