Menu
Neither copper sulfide precipitation nor passivation at the surface of the gold disk was observed under these dissolution rates decreased when the thiosulfate ion concentrations were further increased and the solutions became unstable Figure 1 c shows the gold dissolution from a rotating disk as a function of copper concentration
Get Price
Disclosed is a method of leaching copper and gold from sulfide ores which includes Process 1 of bringing a first aqueous acidic solution which contains chlorine ion copper ion and iron ion but no bromine ion into contact with sulfide ores under supply of an oxidizing agent so as to leach copper component contained in the sulfide ores Process 2 of separating by solid liquid
Get Price
In order to extract a significant amount of copper ions more than M the optimal thiosulphate concentration can be calculated to be M by considering the above equilibria and related calculations The solution pH can be maintained at around by using CH 3 COOH/NH 4 CH 3 COO buffer with a buffer capacity of M
Get Price
An excessively high copper concentration increases cyanide consumption and may have the deleterious effect of overwhelming the ability of activated carbon to effectively adsorb gold/silver copper removal from leach solution can be accomplished through the addition of sulfide at acidic ph to precipitate copper sulfide as a solid the term
Get Price
Parting is a process by which gold is purified to a commercially tradeable standard typically ≥>% Removal of silver is of particular interest since the two metals often co purify The standard procedure is based on the Miller process The separation is achieved by passing chlorine gas into a molten alloy
Get Price
Copper sulfides describe a family of chemical compounds and minerals with the formula Cu x S minerals and synthetic materials comprise these compounds Some copper sulfides are economically important Prominent copper sulfide minerals include Cu 2 S and CuS In the mining industry the minerals bornite or chalcopyrite which consist of mixed copper iron sulfides are often
Get Price
Metals from K2 and Mapungubwe a technological study of early second millennium material culture with an emphasis on conservation
Get Price
A novel flotation promoter used in the concentration of copper bearing ores for the efficient selective flotation of copper values including chalcopyrite with suppression of iron pyrites the promoter comprising a sodium sulfate of an aliphatic hydrocarbon having a carbon chain in excess of 12 carbons and chemically combined with at least one mole of the C2 C3 alkylene oxides
Get Price
Oct 1 2022After adaptation to a high As bearing gold concentrate for 2 years this culture could tolerate more than 7 g/L As III Two distinct clones were sequenced through 16S rDNA gene amplification the establishment of a clone library amplified ribosomal DNA restriction analysis and amplified 16S rDNA sequencing
Get Price
3 days agoAll three 3 drillholes at Modoc South intersected broader lower grade gold values in sulfide bearing volcanic host rocks TS22 27 g/t Au over m highlighting the potential for a significant new style of gold mineralization to pursue at Tuscarora
Get Price
As shown in Fig 2 the combination reagent of copper sulfate and ammonium sulfate has a great influence on the concentrate grade and recovery of gold With the rates of ammonium sulfate rising the gold recovery decreases gradually and the gold grade increases at the beginning and then decreases
Get Price
Sulphides such as copper or zinc etc are present which can be recovered and sold at a profit for specific metal content by shipping direct to the smelter Removal of refractory material by flotation ahead of cyanide plant Each of the above gold process flowsheets lend themselves to variations Briefly some of these are
Get Price
This article describes a method for the hydrochemical dissolution of a sulfide gold bearing raw material from the Uderey s deposit using nitric acid The chemical and phase compositions of the studied material mainly represented by compounds of silicon sodium arsenic iron and sulfur are investigated
Get Price
Copper concentrates The method is applicable to the determination of mass fractions of gold from 0 5 g/t to 300 g/t and of mass fractions of silver from 25 g/t to 1 500 g/t in copper sulfide concentrates containing mass fractions of copper from 15 % to 60 % Lead concentrates
Get Price
TodayAllied Copper has advanced $500 000 to Volt in the form of a secured promissory note bearing interest at 8% per annum due on September 7 2024 and a further $200 000 to Volt in the form of a
Get Price
Nov 17 2022To build up the tumor model 4T1 cells were implanted into the right armpit of each mouse The 4T1 tumor bearing mice were randomly divided into three groups n = 4 for per group Four tumor bearing mice in one group were intratumorally injected with 80 μL of [email protected] nanohybrids solutions at a dose of 4 mg/mL with NIR irradiation
Get Price
Laboratory tests on the two main copper bearing fractions of kupferschiefer sandstone and black shale showed that besides requiring basic minerals to be removed ahead of indirect bioleaching to avoid the formation of ferric carbonates both contained significant amounts of chloride minerals chiefly halite which could have a major negative impact on DISB
Get Price
Jan 25 2022The copper content achieved to 50% 55% through flotation by adding 500g/t of lime pH 9 10g/t of cresol foaming agent 60g/t of ethylxanthate 35g/t of amyl xanthate 1kg/t of sodium sulfide 40g/t of palmitic acid and 75g/t of fuel oil 3 Amine flotation Amines are mainly used as collectors in this method
Get Price
Firstly the copper sulfide ore samples were crushed into particles smaller than 5 mm by a Jaw Crusher Chenggong Mining Equipment Instrument China Secondly the crushed samples 20 g were taken into a 250 ml conical flask and 100 ml of 9K medium was added
Get Price
The majority of copper minerals are sulfides with chalcopyrite CuFeS2 being the most abundant and thus economically the most important Others of economic importance are bornite Cu 5 FeS 4 chalcocite Cu 2 S and covellite CuS Sulfide minerals are insoluble in water or acid solutions unless they are first oxidized
Get Price
Gold can be freed from these ores or concentrates by treating them with various oxidizing processes The most common method is to roast gold bearing minerals at temperatures of 450° to 750° C 840° to 1 380° F to destroy the interfering sulfides
Get Price
The gold bearing copper concentrates were dried bagged and shipped toa Washington for smelting In 1939 a reverberatory furnace was installed to smelt the concentrates and produce blister copper at Mount Morgan In the method for processing gold bearing sulfide concentrates including bacterial leaching of sulfide and cyanide
Get Price
The coal ashes contain high concentrations of metallic cations particularly Ca 2 and Fe 3 The mixed slurry was stirred at 60 °C for 1 h After leaching the sample was centrifuged and the liquid phase was separated Here 20 mL of NaH 2 PO 4 solution M pH = 10 was slowly added to the leachate taken to precipitate out the cations
Get Price
Jul 6 2022The leaching behaviors of gold and silver from a complex sulfide concentrate in copper tartrate thiosulfate solutions were investigated in this paper Experimental parameters including temperature initial pulp pH and concentration of copper tartrate and thiosulfate were systematically studied The copper tartrate thiosulfate leaching system exhibits promising performance in dealing with
Get Price
Apr 6 2022Firstly the copper sulfide ore samples were crushed into particles smaller than 5 mm by a Jaw Crusher Chenggong Mining Equipment Instrument China Secondly the crushed samples 20 g were taken into a 250 ml conical flask and 100 ml of 9K medium was added
Get Price
A V Kanarskii E V Adamov L N Krylova Abstract The technology of concentration of the sulfide antimony arsenic gold bearing ore containing g/tn Au % Sb and % As is developed
Get Price
Jul 13 2022IOCG ore contains copper with a grade of % to 5% and gold with a content of to grams per ton Iron oxide copper gold ore tends to be conical on the edge of granite or appears as long banded breccia or massive iron oxide ore in faults or shears Extraction method of iron oxide copper gold ore
Get Price
dithiopyrylmethane can be used in the flotation concentration of sulfide ores both as independent reagents and as additional collecting agents for the selective separation of sulfide minerals in complex ore dressing [20] The flotation of sulfide ores using benzimidazole 2 thione and 5 butylthio 1 3 4 thiodiazol 2 thiol was studied in [21]
Get Price
The commonest ore used in the extraction of copper is Chalcopyrite CuFeS 2 also known as Copper Pyrites and other such sulphides The percentage of copper in the actual ore is too low for direct extraction of copper to be viable The concentration of ore is required and it is done by the Froth Flotation method Concentration of Ore
Get Price
The geology of the Galiuro Mountains Arizona and of the gold bearing ledge known as Gold Mountain Engineering and Mining Journal 546 547 1902 The geology of the San Xavier North porphyry copper deposit Pima mining district Arizona Arizona Geological Society Digest 11 101 102 1978
Get Price