sulfide and oxide gold ore

Differences Between Sulfides And Oxides Difference Between

May 21, 2013  There are different types of sulfide minerals. Selenides, tellurides and antimonides are just a few of the classes that sulfide minerals have. Second, sulfides differ from oxides through their composition. Oxides are those minerals that contain oxide anions, or

Copper Ore Types: Sulfides vs. Oxides An Investor's ...

There are two main types of copper ore of interest: copper oxide ores and copper sulfide ores. Both ore types can be economically mined, but they are processed in different ways.

The reasons of gold refractory, Gold ore classification ...

Nov 28, 2016  The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite. Ore and sulfide ore are symbiotic closely

Sulphide Gold Ore Treatment by Leaching and Flotation Process

Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost and at the same time obtain the highest net return. This latter point is most important. In many cases a gold mill using an all-cyanide flowsheet with fine grinding of all the ore will report very low gold content in the tailings particularly on an ...

Rebellious Ores: Sulfides, Selenides and Tellurides

It is extremely important when treating high sulfide ores with cyanide to keep a sufficient protective base in the solution. Many sulfide minerals also contain things like copper or antimony that can react with the cyanide, preventing the cyanide from leaching out the gold and silver.

Copper Ore Types: Sulfides versus Oxides Nasdaq

Apr 23, 2011  Copper oxide ores. Copper oxide ores are not as attractive of an exploration target as the copper sulfide ore types due to their lower grade, however low-grade copper oxide

12. Supergene Ore and Gangue Characteristics

an intensely altered and leached Fe oxide-rich gossan (the remains of the original massive sulfide) that extends upward to the paleosurface. Studies of hydrothermal sulfide mounds and chimneys on oceanic spreading axes reveal a second type of gossan forma-tion: oxidation of sulfide minerals by interaction with oxygen-rich ambient seawater.

Treatment of Mixed Sulfide Oxide Ores of Copper

Metallurgical ContentSULFURIC ACID AS A SOLVENTTREATMENT OF OXIDIZED COPPER BY AGITATIONSULFUR DIOXIDE AND AMMONIA AS SOLVENTSIRON SALTS AS SOLVENTSOTHER SOLVENTS FOR OXIDIZED COPPERCONTROL OF TEMPERATURE DURING SULFATIONTHE PRECIPITANTELECTROLYSISSULFUR-DIOXIDE PRECIPITATIONHYDROGEN SULFIDE AS PRECIPITANTPRECIPITATION BY HEAT ALONEOTHER PRECIPITANTSMECHANICAL HANDLING OF ORE

Ore deposits formed by oxidation and supergene enrichment

Ore Deposits Formed by Oxidation and Supergene Enrichment When ore deposits are exposed to the oxidation zone they are weathered and altered with the country rocks. The surface waters oxidize many ore minerals and yield solvents that dissolve other minerals. An orebody thus becomes oxidized and generally leached of many of its valuable materials down to the groundwater table, or to ...

The reasons of gold refractory, Gold ore classification ...

Nov 28, 2016  The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite. Ore and sulfide ore are symbiotic closely under submicron particle, we should ...

Characterizing gold in refractory sulfide gold ores and ...

Gold is present in refractory sulfide gold ores mainly in arsenian pyrite and arsenopyrite, where it occurs in both the chemically bonded state and as nano-size grains of metallic gold. During roasting or pressure oxidation, the sulfide matrix is destroyed and essentially all the gold is converted to the metallic form. The liberated gold is readily dissolved in conventional cyanide

Gold in Minerals and the Composition of Native Gold

The native elements contain the most gold, followed by the sulfide minerals. Several gold tellurides are known, but no gold selenides have been reported, and only one sulfide, the telluride-sulfide mineral nagyagite, ii:; known. The nonmetallic minerals carry the least gold, and the light-colored minerals generally contain less gold ...

Gold Recovery 101 - Sepro Systems

Free-Milling Gold Gold ore is considered free-milling when over 90% of the gold can be recovered by a conventional gravity-cyanidation process with low reagent consumptions at a grind size of 80% passing 75 µm. Some examples of free-milling gold ores include quartz-veined deposits and oxidized ores. Sulfide-Associated Gold

Sulfide Ores - an overview ScienceDirect Topics

VMS ore-forming fluids are acidic, reduced, 1–3 M chloride solutions in which metals were transported mainly as chloride complexes (Table 3).Before the discovery of black smokers, temperatures of the ore fluids were estimated from rare fluid inclusion data and sulfur isotope fractionation between sulfide mineral pairs. pH values about 1 unit less than neutral (~5 at

Iron oxide copper gold ore deposits - Wikipedia

Iron oxide copper gold ore deposits (IOCG) are important and highly valuable concentrations of copper, gold and uranium ores hosted within iron oxide dominant gangue assemblages which share a common genetic origin. These ore bodies range from around 10 million tonnes of contained ore, to 4,000 million tonnes or more, and have a grade of between 0.2% and 5% copper, with gold

Gold leaching from oxide ores in alkaline glycine ...

Dec 01, 2020  Gold extraction by cyanidation and glycine-permanganate from gold oxide ore at leach conditions of 2 g/L glycine, 30% solid content, 100% -75 μm, pH 10.5, 2.0 g/L permanganate at room temperature. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)

Leaching of an oxide gold ore with chloride/hypochlorite ...

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl)2 vs. NaOCl, OCl− concentration, and

Treatment of Mixed Sulfide Oxide Ores of Copper

Metallurgical ContentSULFURIC ACID AS A SOLVENTTREATMENT OF OXIDIZED COPPER BY AGITATIONSULFUR DIOXIDE AND AMMONIA AS SOLVENTSIRON SALTS AS SOLVENTSOTHER SOLVENTS FOR OXIDIZED COPPERCONTROL OF TEMPERATURE DURING SULFATIONTHE PRECIPITANTELECTROLYSISSULFUR-DIOXIDE PRECIPITATIONHYDROGEN SULFIDE AS PRECIPITANTPRECIPITATION BY HEAT ALONEOTHER PRECIPITANTSMECHANICAL HANDLING OF ORE

Heap Leaching Oxide and Sulfide Copper Ores

Table of ContentsExperimentalOres used in this StudyAssaying of SamplesLaboratory StudiesProcedures Used in Laboratory StudiesExperimental DataDiscussion of ...

sodium sulfide usage in the flotation for ore dressing ...

Aug 15, 2013  Gold and silver ore sulfide minerals often symbiotic especially gold and pyrite are closely dependent relationship. Since the surface of pyrite with semiconductor properties and certain electronic transmission capabilities but also through electrostatic surface of pyrite with HS-S0 CLP EHS-S0 compare 15 in pulp pH in the range of 813 pyrite ...

Alacer Gold Announces the Processing of Oxide Ore Through ...

TORONTO, Sept. 04, 2018 (GLOBE NEWSWIRE) -- Alacer Gold Corp. ("Alacer" or the "Company") (TSX:ASR) announces the processing of the first oxide ore

Gold processing - Mining and concentrating Britannica

Gold processing - Gold processing - Mining and concentrating: The nature of the ore deposit determines the mining and mineral processing techniques applied. Oxide ore deposits are frequently of such low grade (e.g., 3 to 10 parts per million) that extensive mineral processing cannot economically be justified. In this case they are merely shattered by explosives and then

Gold(I) sulfide - Wikipedia

Gold(I) sulfide is the inorganic compound with the formula Au 2 S. It is the principal sulfide of gold.It decomposes to gold metal and elemental sulfur, illustrating the "nobility" of gold. Structure and preparation. The compound crystallizes in the motif seen for cuprous oxide: gold is 2-coordinate, sulfur 4-coordinate, and the S-Au-S linkage is linear. ...

The reasons of gold refractory, Gold ore classification ...

Nov 28, 2016  The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite. Ore and sulfide ore are symbiotic closely under submicron particle, we should ...

Gold in Minerals and the Composition of Native Gold

The native elements contain the most gold, followed by the sulfide minerals. Several gold tellurides are known, but no gold selenides have been reported, and only one sulfide, the telluride-sulfide mineral nagyagite, ii:; known. The nonmetallic minerals carry the least gold, and the light-colored minerals generally contain less gold ...

Characterizing gold in refractory sulfide gold ores and ...

Gold is present in refractory sulfide gold ores mainly in arsenian pyrite and arsenopyrite, where it occurs in both the chemically bonded state and as nano-size grains of metallic gold. During roasting or pressure oxidation, the sulfide matrix is destroyed and essentially all the gold is converted to the metallic form. The liberated gold is readily dissolved in conventional cyanide

Gold(I) sulfide - Wikipedia

Gold(I) sulfide is the inorganic compound with the formula Au 2 S. It is the principal sulfide of gold.It decomposes to gold metal and elemental sulfur, illustrating the "nobility" of gold. Structure and preparation. The compound crystallizes in the motif seen for cuprous oxide: gold is 2-coordinate, sulfur 4-coordinate, and the S-Au-S linkage is linear. ...

Gold processing - Mining and concentrating Britannica

Gold processing - Gold processing - Mining and concentrating: The nature of the ore deposit determines the mining and mineral processing techniques applied. Oxide ore deposits are frequently of such low grade (e.g., 3 to 10 parts per million) that extensive mineral processing cannot economically be justified. In this case they are merely shattered by explosives and then

Alacer Gold Announces the Processing of Oxide Ore Through ...

TORONTO, Sept. 04, 2018 (GLOBE NEWSWIRE) -- Alacer Gold Corp. ("Alacer" or the "Company") (TSX:ASR) announces the processing of the first oxide ore

Leaching of an oxide gold ore with chloride/hypochlorite ...

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl)2 vs. NaOCl, OCl− concentration, and

Heap Leaching Oxide and Sulfide Copper Ores

Table of ContentsExperimentalOres used in this StudyAssaying of SamplesLaboratory StudiesProcedures Used in Laboratory StudiesExperimental DataDiscussion of ...

Sulfide - Wikipedia

Sulfide (British English also sulphide) is an inorganic anion of sulfur with the chemical formula S 2− or a compound containing one or more S 2− ions. Solutions of sulfide salts are corrosive. Sulfide also refers to chemical compounds large families of inorganic and organic compounds, e.g. lead sulfide and dimethyl sulfide. Hydrogen sulfide (H 2 S) and bisulfide (SH −) are the

Chris Ralph's Gold Prospecting Encyclopedia: Information ...

Chris' Prospecting Encyclopedia, Your best source of information on: Gold nuggets, gold panning, how to design and build your own mining equipment, metal detecting for nuggets, dredging for gold, prospecting books, California prospecting, 49ers, rock hounds, investing, mining stocks, mother lode, sulfides, turquoise, jewelry, silver, gold, gems, gold flakes,

Roasting (metallurgy) - Wikipedia

In roasting, the ore or ore concentrate is treated with very hot air. This process is generally applied to sulfide minerals. During roasting, the sulfide is converted to an oxide, and sulfur is released as sulfur dioxide, a gas. For the ores Cu 2 S and ZnS , balanced equations for the roasting

Mining and Extraction: Oxide Ores - processes for ...

Extraction of sulfide ores is covered in more detail in Copper Mining and Extraction: Sulfide Ores (11–14), but is introduced here because an important by-product of this process is used for the extraction of oxide ores. Pyroprocessing Sulfide Ores Provides Acid for Leaching. The process used to treat sulfide copper ores begins at the mine ...

Is there any case that gold is hosted by magnetite directly?

SInce gold is transport as sulfur complex, most of gold should relate to sulfide. Therefore, gold hosted by magnetite indicates a totally different tansport machanism in the system. Cite

POLYMETALLIC VEIN AND REPLACEMENT DEPOSITS

Igneous ore—native gold, cerargyrite, and iron oxide minerals. Minerals formed by recent weathering after the onset of mining: These minerals are primarily soluble sulf ate minerals indicative of deposition from locally highly acidic water.