ores step sulfide

Roasting (metallurgy) - Wikipedia

Roasting is a process of heating of sulfide ore to a high temperature in presence of air. It is a step of the processing of certain ores.More specifically, roasting is a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal component(s). Often before roasting, the ore has already been partially purified, e.g. by froth flotation.


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CA2478516C - A process for the recovery of value metals ...

A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed. The leaching is controlled, by use of low concentrations of hydrochloric acid and a redox potential, to effect formation of hydrogen sulfide from the base metal sulfide ore.


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Introduction to Mineral Processing

In ore beneficiation, flotation is a process in which valuable minerals are separated from worthless material or other valuable minerals by inducing them to gather in and on the surface of a froth layer. Sulfide and non-sulfide minerals as well as native metals are recovered by froth flotation.


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The Extraction of Copper - Chemistry LibreTexts

Sulfide ores such as chalcopyrite ((CuFeS_2)) are converted to copper by a different method from silicate, carbonate or sulfate ores. Chalcopyrite (also known as copper pyrites) and similar sulfide ores are the commonest ores of copper. The ores typically contain low percentages of copper and have to be concentrated before refining (e.g., via ...


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Copper processing - Ores | Britannica

The second step, involving either smelting or leaching, removes a large proportion of impurity elements—in particular iron and, in the case of sulfide ores, sulfur. The final step, refining, removes the last traces of the impurity elements and produces a copper product of 99.99 percent purity.


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Sulfide Ores - an overview | ScienceDirect Topics

Mined sulfide ores contain pentlandite, pyrrhotite, chalcopyrite and gangue rock. A high-grade nickel concentrate is produced from these ores by the following minerals-processing techniques: (a) crushing and grinding the ores to liberate the nickel- and cobalt-bearing minerals from the .


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Sulfide Mining Overview - Save Our Sky Blue Waters

amount of ore can be processed and the processes offer more safety and access for mine workers. 15 In open pit operations, the fist step is the removal of overburden and waste rock to 7 United States Geological Survey. 1998. Potential for new Nickel-Copper Sulfide Deposits in the Lake Superior Region.


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The Extraction of Copper - Chemistry LibreTexts

Sulfide ores such as chalcopyrite ((CuFeS_2)) are converted to copper by a different method from silicate, carbonate or sulfate ores. Chalcopyrite (also known as copper pyrites) and similar sulfide ores are the commonest ores of copper. The ores typically contain low percentages of copper and have to be concentrated before refining (e.g., via ...


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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.

Nickel processing - Extraction and refining | Britannica

Nickel processing - Nickel processing - Extraction and refining: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating temperatures in nickel ...


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ROASTING OF SULFIDE MINERALS

ROASTING OF SULFIDE MINERALS In addition to common metals like copper, lead, zinc, and nickel a number of other metals such as antimony, bismuth, cadmium, cobalt, mercury, and molybdenum occur as sulfide minerals. Sulfides are not reduced with the most widely used redu-cing agents, carbon and hydrogen, because the free energy change for the ...


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How is copper extracted from its sulphide ore? Explain the ...

Copper from Cu2S can be obtained from its ore simply by heating in air.(I) First step is the heating of sulphide ore of copper in the presence of an excess of air. This process is known as roasting.(II) The second step is the self-reduction of copper.(I) 2Cu2S + 3O2 (g) →∆ 2Cu2O (s) + 2SO2(g)(II) 2Cu2O + Cu2S →∆ 6Cu (s) + SO2 (g)


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differences in processing sulfide and oxide gold ores ...

Electrochemistry Encyclopedia — Extracting metals from sulfide ores . in zinc sulfide processing. .Mixed oxide and sulfide copper ores . Biochemical leaching is now a well-established commercial process for treating gold ores . »More detailed


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Processing of Nickel Laterite Ores on the Rise

As sulfide ore resources dwindle, however, processing of lateritic nickel ores is becoming of greater necessity, with many recognizing nickel laterite ores as the future of the nickel industry. The Move to Nickel Laterites. Sulfides have long supplied the bulk of the global appetite for nickel.


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can someone help me with chem plz? | Yahoo Answers

May 07, 2010 · A company desires to produce nickel from refining nickel oxide and sulfide ores. The first step of the process will produce a nickel carbonyl gas Ni(CO)4 by heating the ore. The second step is as follows: Ni(CO)4(g) Ni(s) + 4CO(g) What effect on the process would be caused by increasing pressure? 1)Ni would be produced at a higher rate 2)Ni would be produced at a lower rate 3)no effect on this ...

Zinc processing - Ores | Britannica

Zinc processing - Zinc processing - Ores: Zinc ores are widely distributed throughout the world, although more than 40 percent of the world's output originates in North America and Australia. The common zinc-containing minerals are the zinc sulfide known as zinc blende or sphalerite (ZnS), a ferrous form of zinc blende known as marmatite [(ZnFe)S], and a zinc carbonate known as calamine or ...


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Clean, electrically-driven process to separate ...

Jun 29, 2017 · Clean, electrically-driven process to separate commercially important metals from sulfide minerals in one step. by Denis Paiste, Massachusetts Institute of Technology


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Copper Production: How Is Copper Made?

The next step in the refining process is to oxidize liquid matte in order to remove iron to burn off sulfide content as sulfur dioxide. The result is 97-99 percent blister copper. The term 'blister copper' comes from the bubbles produced by sulfur dioxide on the surface of the copper.


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Copper Production: How Is Copper Made?

The next step in the refining process is to oxidize liquid matte in order to remove iron to burn off sulfide content as sulfur dioxide. The result is 97-99 percent blister copper. The term 'blister copper' comes from the bubbles produced by sulfur dioxide on the surface of the copper.


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Sulphide Gold | Gekko

When properly characterised, sulphide complex gold ores can be efficiently processed using a Gekko flowsheet design. When gold is associated with sulphides, it can be either fully encapsulated by the sulphide particle or partially liberated, i.e. exposed on the edge of the sulphide mineral.


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Sulfide minerals - Wikipedia

The sulfide minerals are a class of minerals containing sulfide (S 2−) or persulfide (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, .


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Copper Mining and Extraction: Sulfide Ores

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. For example: FeO(s) + SiO 2 (s)→ FeO.SiO 2 (slag) This is .


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Solved: A Main Source Of Sulfur Oxide Pollutants Are Smelt ...

A main source of sulfur oxide pollutants are smelters where sulfide ores are converted into metals. The first step in this process is the reaction of the sulfide ore with oxygen in re-actions such as: (a) Sulfur dioxide can then react with oxygen in air to form sulfur trioxide: (b) Sulfur trioxide can then react with water from rain to form sulfuric acid that falls as acid rain: (c) Classify ...


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Copper Production: How Is Copper Made?

The next step in the refining process is to oxidize liquid matte in order to remove iron to burn off sulfide content as sulfur dioxide. The result is 97-99 percent blister copper. The term 'blister copper' comes from the bubbles produced by sulfur dioxide on the surface of the copper.


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EXTRACTING METALS FROM SULFIDE ORES - Electrochemical .

Electrorefining is the final step in the smelting process for the recovery of copper from sulfide ores, and this process accounted for nearly 80% of the world copper production of 16 million tones in 2009.


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Sulfide Mining, Mining Methods, Techniques, Copper, Zinc ...

Sulfide Mining. Mining is the method of tacking materials from the earth to get valuable metal ores like copper, zinc, and lead, which are known as target minerals in mining terms. Metal ores like copper, zinc and lead are minute quantities contrasted to the whole composition of the earth. ...


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Mineralogy of Sulfides - Elements

Metal sulfides are the most important group of ore minerals. Here, we review what is known about their compositions, crystal structures, phase relations and parageneses. Much less is known about their surface chemistry, their biogeochemistry, or the formation and behaviour of 'nanoparticle' sulfides, whether formed abiotically or biogenically.


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Copper Mining and Processing: Processing of Copper Ores ...

B. Processing of Sulfide Ore. Sulfide ores are generally processed using pyrometallurgy, the extraction and purification of metals by processes involving the application of heat. This process uses a series of physical steps and high temperatures to extract and purify copper from copper sulfide ores, in four basic steps: 1) froth flotation, 2 ...


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Lead-Zinc ores - Danafloat - Home

The established lead-zinc ore flotation processing scheme is to add zinc sulphate (ZnSO4) to the grind to control metal ion activation (sphalerite depression). Often metabisulphide or other sulphidation chemicals are added with the zinc sulphate for iron sulphide mineral depression.


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Sulphide - an overview | ScienceDirect Topics

Peter C. Lightfoot, in Nickel Sulfide Ores and Impact Melts, 2017. Controls on the composition of sulfide magmas. Sulfide melt separation from the silicate magma is a key step, and the formation of a magmatic sulfide in a silicate magma has the effect of upsetting the partitioning behavior of elements such as Ni, Cu, Co, and Pt, Pd, and Au which would normally be governed by partitioning ...


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