sulfide ore oxide

Acid leaching of oxide–sulfide copper ore prior the ...

Oxide–sulfide copper ore was sampled from the ore body Cerovo C1 (south deposit) and used in this study. The chemical composition of the ore sample is pre-sented in Table 1. From Table 1, it can be seen that the high copper concentration is in the sample, as well as

Why oxide form of ore is preferred over sulphide in ...

In sulphide ore you have to use one or two steps more like froth flotation process. In oxide ore direct reduction is simpler. The reduction of metal from oxide is a bit easy because Delta g in most of the cases are negative and it produces less pollutant also but when we talk about sulphide ores this produce harmful sulphur gas SO2 during the ...

What is roasting of a sulfide ore? - Quora

Answer (1 of 5): The concentrated ore ( received after crushing and floating) is roasted in a furnace in the presence of a current of air. Sulphur is oxidized to SO2 and impurities of arsenous and antimony are removed as volatile oxides. The following reaction takes place. 2CuFeS2 + O2 —- Cu2S ...

Sulfide-silicate textures in magmatic Ni-Cu-PGE sulfide ...

72 intergrowths between sulfide and associated gangue silicate and oxide minerals. Textures and 73 intergrowths in massive ores, semi-massive breccia ores and other variants of sulfide-74 dominated ores will be described in a forthcoming companion paper.

Microwave Irradiation Effect on Copper Leaching from ...

of sulfide ore and around 5.26 g of oxide ore powder were added into 100 ml of the leach solutions in the flasks. Individually and laboratory flask containing slurry density of 5% (5 g ore in 100 ...

Arizona Department of Mines and Mineral Resources

copper production from the mixed oxide-sulfide ore was observed to be directly impacted within the month when the method was at times replaced with the standard methods. Discussion of Test Work The boiling ferric sulfate method was developed as a laboratory tool used to mimic the actual chemical leaching behavior in the heap leach process.

differences in processing sulfide and oxide gold ores ...

Introduction to Mineral Processing. The main difference in lead/zinc flotation is that zinc is usually depressed …. Gold, silver, copper …. Oxide copper ore, low-grade copper sulfide overburden, …. » More detailed.

(PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE | …

Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done

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 media ...

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. Copper sulfide ...

Sulfide mineral - Wikipedia

The sulfide minerals are a class of minerals containing sulfide (S 2−) or disulfide (S 2 2−) as the major anion.Some sulfide minerals are economically important as metal ores.The sulfide class also includes the selenides, the tellurides, the arsenides, the antimonides, the bismuthinides, the sulfarsenides and the sulfosalts. Sulfide minerals are inorganic compounds

A sulfide ore is first converted into its oxide before ...

A metal oxide is generally less stable than the metal sulphide. A metal oxide is generally less stable than the metal sulfide. Thus, reduction of metal oxide is easier than the reduction of metal sulfide. Hence, a sulfide ore is first converted into it's oxide before reduction. This process is …

ROASTING OF SULFIDE MINERALS

In order to produce a mixed oxide-sulfate product Sulfation roastis preferred. The most outstanding example of this is found inthecommercial productionofzincby the hydrometallurgicalroute.Roast-reduc-tion is aimed at producing a metal directly by the interaction between the oxide formedin situand the unroasted sulfide. This is employed in the ...

Why is roasting carried out in sulphide ores? - Quora

Answer (1 of 2): Oxides of substance are easy to purify than other for purification all the ores are first converted into it's oxide.Sulphide ores are ...

Process for treating gold-containing sulfide ores ...

(a) calcining the granular sulfide ore at a temperature of 500° to 900° C. with addition of gas containing free oxygen to produce a gold-containing, metal oxide-containing solids mixture and an SO 2-containing exhaust gas; (b) forming an aqueous sulfite solution by contacting the SO 2-containing exhaust gas with an aqueous solution;

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

The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. A by-product of the smelting and converting furnaces is sulfuric acid. In what looks like a lucky coincidence, sulfuric acid is needed ...

Sulfide Ore | Article about Sulfide Ore by The Free Dictionary

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased. Sulfide Ore any of several natural mineral formations consisting of metal sulfides. Metal selenides, tellurides, arsenides, and antimonides are also classified among the sulfide ores. Sulfide ores are an important source for the production ...

A sulfide ore is first converted into its oxide before ...

Nickel Sulfide Versus Laterite : The Hard Sustainability ...

sulfide or laterite (oxide) resources. Historically production has been dominated by sulfide ores but future production is increasing shifting to laterite ores. The principal reason for this historically is that sulfide ores are easier to process, through conventional mining, smelting and refining, compared to laterite ores which ...

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 conjugate ...

The Smelting of Sulfide Ores of Copper in Preconquest Peru

With a simple sulfide ore like chalcocite, once the sulfur has been burned off as sulfur dioxide (SO2) and the copper sulfide thus converted to copper oxide, the oxide can be reduced with charcoal, described above (Thompson 1958: 4). How the Indians happened on the roasting of sulfide ores may never be known. Obviously

Effect of Desliming on Flotation Response of Kansanshi ...

The Kansanshi mixed copper sulfide-oxide ore contains significant proportions of fine material manifesting in a variety of processing challenges. This paper presents the work which was carried out to evaluate the efficacy of desliming in improving the flotation response of the ore. Two modes of desliming were investigated, namely; sieving and elutriation after which the deslimed material was ...

Mineralogy of Sulfides | Elements | GeoScienceWorld

Investigation of the sorption of heavy metals (e.g. As, Mo, Hg) and radionuclides (U, Tc) by pyrite surfaces has identified a number of complex reactions that lead to sorption. For example, in the sorption of Cd 2+, surface reconstruction and disproportionation occurs, leaving a mixture of sulfide and oxide products (Bostick et al. 2000).

Sulfide Minerals: Definition, Properties & Examples ...

Molybdenum sulfide is the principal ore mineral to obtain molybdenum, a metal commonly used in alloys like stainless steel. This sulfide has a dark gray, metallic appearance and is very soft which ...

A fresh approach to sulfide ores - CIM

T he copper mining industry is reaching a turning point. Surface oxide deposits are depleting and copper miners are turning their attention to untapped sulfide ores found deeper underground. However, sulfides require more expensive processing techniques since they are not responsive to standard technologies that are used in oxide …

Hycroft Mine Commences Production from Sulfide Ores as ...

While the critical focus is on the oxidation and leach process of the sulfide ores, Hycroft has also mined and stacked (on entirely separate leach pad cells) existing oxide ore stockpiles to ...

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.

Online analysis of minerals from sulfide ore using near ...

A Pyhäsalmi mine excavates sulfide ore from volcanogenic massive sulfide deposits. The volcanogenic massive sulfide ore type is the most exploited type in Fennoscandia Shield.[ 16 ] The ore of Pyhäsalmi contains copper (Cu), zinc (Zn), iron (Fe), and sulfur (S).