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rimpurities in roasting of cu ore

Copper processing - Roasting, smelting, and converting ...

Copper processing - Copper processing - Roasting, smelting, and converting: Once a concentrate has been produced containing copper and other metals of value (such as gold and silver), the next step is to remove impurity elements. In older processes the concentrate, containing between 5 and 10 percent water, is first roasted in a cylindrical, refractory-lined furnace of either the hearth or ...

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Roasting of copper pyrites is done: - Toppr Ask

to remove moisture and volatile impurities. B. to oxidise free sulphur. C. to decompose pyrites into C u 2 S and F e S. D. to decompose C u 2 S into blister copper. MEDIUM. Answer. During roasting of copper pyrite ore: (A) moisture is removed and sulphur, arsenic and antimony are removed in the form of their volatile oxides. (B) Free sulphur is oxidized to sulphur dioxide. (C) Coppr pyrite ...

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Copper Mining and Extraction Sulfide Ores

The world’s largest copper ore deposits are found in Chile on the west coast of South America. This is due to the volcanic activity that is part of the process that created the Andes mountain chain. This is the west coast of South America, showing the line of volcanoes that stretches along the whole west coast of the continent. They are caused by subduction of the Nazca tectonic plate under ...

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copper extraction and purification - chemguide

Extracting copper from other ores. 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 very dilute copper(II) sulphate solution. Concentration of the copper(II) sulphate solution by solvent extraction. The very dilute ...

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Extraction of Copper from Copper pyrite Grade 12 Science ...

The principal ore of copper is copper pyrite and copper is extracted from this ore. The different steps in extraction of copper are: Crushing and Concentration: The ore obtained from mines are broken down into small piece by jaw crusher and then pulverized. The ore being sulphide ore is concentrated by froth floatation process. Pulverized ore ...

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Copper Extraction from Sulfide Ores - Latest Contents

ii-ROASTING The concentrated ore is heated strongly in the presence of hot air in a furnace called reverberatory furnace. During roasting the copper pyrite decomposes to Cu2S and FeS and the sulphur is oxidized to SO2 gas. 2CuFeS2+O2 → Cu2S + FeS + SO2 Arsenic and antimony present as impurities are removed in the form of their volatile oxides.

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Extraction of Copper from Copper pyrite Grade 12

The principal ore of copper is copper pyrite and copper is extracted from this ore. The different steps in extraction of copper are: Crushing and Concentration: The ore obtained from mines are broken down into small piece by jaw crusher and then pulverized. The ore being sulphide ore is concentrated by froth floatation process. Pulverized ore ...

More

copper extraction and purification - chemguide

Extracting copper from other ores. 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 very dilute copper(II) sulphate solution. Concentration of the copper(II) sulphate solution by solvent extraction. The very dilute ...

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METALLURGY OF COPPER-EXTRACTION OF COPPER

IMPORTANT ORES OF COPPER. citycollegiate. Copper pyrite or chalcopyrite (CuFeS2). Chalocite (Cu2S) or copper glance. Malachite green [CuCO3.Cu(OH)2]. Azurite blue [2CuCO3.Cu(OH)2]. Bornite (3Cu2S.Fe2S3) or peacock ore. Melaconite (CuO) etc. EXTRACTION OF COPPER FROM SULPHIDE ORE. Large amount of copper are obtained from copper pyrite (CuFeS2) by smelting. Ores

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Roasting of copper pyrites ores is for the following

Roasting: The process in which the concentrated ore is heated in blast of air and ore gets converted into oxide and impurities like sulphur, arsenic are also oxidised to their oxides and removed is called Roasting. It requires very high temperature and specialized furnace

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Copper Extraction from Sulfide Ores - Latest Contents

ii-ROASTING The concentrated ore is heated strongly in the presence of hot air in a furnace called reverberatory furnace. During roasting the copper pyrite decomposes to Cu2S and FeS and the sulphur is oxidized to SO2 gas. 2CuFeS2+O2 → Cu2S + FeS + SO2 Arsenic and antimony present as impurities are removed in the form of their volatile oxides.

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(PDF) PARTIAL ROASTING OF COPPER CONCENTRATE

ROASTING REACTIONS AND CALCINE QUALITY Description of partial roasting process The solution to the problem is to roast the high–As copper concentrate in order to remove the arsenic before it is smelted in the matte smelting furnace. The advantage with roasting is that the arsenic can be concentrated into one gas stream that can be specially designed to handle and stabilize the arsenic ...

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help solving for mass % of a copper ore? Yahoo Answers

30/07/2012  Copper metal can be prepared by roasting copper ore, which can contain curprite and copper 2 sulfide. Cu2S +O2---> 2Cu + SO2 CuS +O2 ---> Cu + SO2 Suppose an ore sample contains 11.0% impurity in addition to a mixture of CuS and Cu2S. Heating 100.0g of the mixture produces 75.4g of copper metal with a purity of 89.5%. What is the weight percent of CuS and Cu2S in the ore.

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Copper extraction - Wikipedia

Copper ores containing chalcopyrite can be concentrated to produce a concentrate with between 20% and 30% copper-in-concentrate (usually 27–29% copper); the remainder of the concentrate is iron and sulfur in the chalcopyrite, and unwanted impurities such as silicate gangue minerals or other sulfide minerals, typically minor amounts of pyrite, sphalerite or galena. Chalcocite concentrates ...

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Explain the following:Partial roasting of sulphide ore is ...

The ore which can be attracted by the magnetic field can be concentrated by the process of magnetic separation. Among the ores mentioned in table 6.1, the ores of iron such as haematite (Fe 2 O 3), magnetite (Fe 3 O 4), siderite (FeCO 3), and iron pyrites (FeS 2) can be separated by the process of magnetic separation.

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Copper Chemistry? Yahoo Answers

06/09/2007  Copper metal can be prepared by "roasting" copper ore, which usually consists of a mixture of cuprite, Cu2S, and copper(II) sulfide. Cu2S(s) + O2(g) 2 Cu(s) + SO2(g) CuS(s) + O2(g) Cu(s) + SO2(g) Suppose a sample of copper ore contains 11.0% (by mass) impurities in addition to a mixture of Cu2S and CuS. Heating 100.0 g of the impure ore produces 75.4 g of copper metal with a purity of

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Roasting of copper pyrites is done: - Toppr Ask

to remove moisture and volatile impurities. B. to oxidise free sulphur. C. to decompose pyrites into C u 2 S and F e S. D. to decompose C u 2 S into blister copper. MEDIUM. Answer. During roasting of copper pyrite ore: (A) moisture is removed and sulphur, arsenic and antimony are removed in the form of their volatile oxides. (B) Free sulphur is oxidized to sulphur dioxide. (C) Coppr pyrite ...

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The Extraction of Copper - Chemistry LibreTexts

21/08/2020  Extracting of Copper from Other Ores. Copper can be extracted from non-sulfide 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 sulfuric acid to produce a very dilute copper(II) sulfate solution. Concentration of the copper(II) sulfate solution by solvent extraction. The very dilute ...

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Roasting - an overview ScienceDirect Topics

It is used to remove the sulfur ore, arsenic, antimony, and other harmful impurities in ore. In oxidation roasting, the sulfide ore is first decomposed into low-valence sulfide and sulfur, and then the oxide is formed. The oxidation roasting of some sulfide ores is exothermic. Oxidation roasting equipment includes a rotary kiln, a multichamber baking furnace, and fluidized baking furnace (see ...

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Copper Extraction from Sulfide Ores - Latest Contents

ii-ROASTING The concentrated ore is heated strongly in the presence of hot air in a furnace called reverberatory furnace. During roasting the copper pyrite decomposes to Cu2S and FeS and the sulphur is oxidized to SO2 gas. 2CuFeS2+O2 → Cu2S + FeS + SO2 Arsenic and antimony present as impurities are removed in the form of their volatile oxides.

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(PDF) PARTIAL ROASTING OF COPPER CONCENTRATE

ROASTING REACTIONS AND CALCINE QUALITY Description of partial roasting process The solution to the problem is to roast the high–As copper concentrate in order to remove the arsenic before it is smelted in the matte smelting furnace. The advantage with roasting is that the arsenic can be concentrated into one gas stream that can be specially designed to handle and stabilize the arsenic ...

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Consider the following statements. Roasting is carried

Consider the following statements. Roasting is carried out to: (i) convert sulphide to oxide and sulphate. (ii) remove impurities of CuS and FeS present in the ore of tin stone (S n O 2 ) as C u S O 4 and F e S O 4 . (iii) melt the ore. (iv) remove arsenic and sulphur impurities. Of these statements:

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Metal and Metallurgy Notes, Videos, QA and Tests Grade ...

Roasting is the process of heating a concentrated ore in the presence of ore below the melting point. The purpose of roasting is to convert a concentrated ore into oxide form. It is mainly carried out for the oxidation of sulphide ores. During roasting similar changes take place. a)Oxidation of ores takes place. ZnS+ O 2 → ZnO+ SO 2. PbS+ O 2 ...

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Consider the following statements Roasting is

Consider the following statements Roasting is carried out to 1. convert sulphide to oxide and sulphate. 2. remove water of hydration. 3. melt the ore 4. remove arsenic and sulphur impurities

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Copper Chemistry? Yahoo Answers

06/09/2007  Copper metal can be prepared by "roasting" copper ore, which usually consists of a mixture of cuprite, Cu2S, and copper(II) sulfide. Cu2S(s) + O2(g) 2 Cu(s) + SO2(g) CuS(s) + O2(g) Cu(s) + SO2(g) Suppose a sample of copper ore contains 11.0% (by mass) impurities in addition to a mixture of Cu2S and CuS. Heating 100.0 g of the impure ore produces 75.4 g of copper metal with a purity of

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NEET Chemistry Chapter Wise Mock Test - CBSE Tuts

(a) During roasting, moisture is removed from the ore (b) The ore is free from almost all non-metallic impurities (c) Calcination of ore is carried out in the absence of any blast of air (d) The concentrated zinc blende is subjected to calcination during its extraction by pyrometallurgy. Question 14. Electrometallurgical process is used to ...

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Roasting of copper pyrites is done: - Toppr Ask

to remove moisture and volatile impurities. B. to oxidise free sulphur. C. to decompose pyrites into C u 2 S and F e S. D. to decompose C u 2 S into blister copper. MEDIUM. Answer. During roasting of copper pyrite ore: (A) moisture is removed and sulphur, arsenic and antimony are removed in the form of their volatile oxides. (B) Free sulphur is oxidized to sulphur dioxide. (C) Coppr pyrite ...

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Copper mining. Chemical reactions.

Roasting: In roasting, we: change some of the CuFeS 2 to copper oxide remove some of the sulphur as sulphur dioxide. We do this by heating the concentrated ore from froth floatation. It is heated to betweem 500 °C and 700 °C in air. The product from the roaster is called calcine. It is a solid mixture of oxides, sulphides and sulphates. One ...

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Roasting - an overview ScienceDirect Topics

It is used to remove the sulfur ore, arsenic, antimony, and other harmful impurities in ore. In oxidation roasting, the sulfide ore is first decomposed into low-valence sulfide and sulfur, and then the oxide is formed. The oxidation roasting of some sulfide ores is exothermic. Oxidation roasting equipment includes a rotary kiln, a multichamber baking furnace, and fluidized baking furnace (see ...

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23.2: Principles of Extractive Metallurgy - Chemistry ...

25/08/2020  Step 2: Conversion of Fe sulfide ores to Fe oxides through roasting (e.g., roasting of Chalcopyrite ore ) \[ 2 CuFeS)2 + 3 O)2 \overset{\Delta}{\longrightarrow} 2 FeO + 2 CuS + 2 SO_2\] Step 3: Smelting: mixing with coke/charcoal and heated at high temperatures (i.e 800 o C) for copper to keep Cu from remaining in sulfide form).

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One of the most common ores of copper contains both

One of the most common ores of copper contains both iron and sulfur impurities. The copper can be separated from this ore by roasting, a two-step process which starts with the reaction shown in the equation below. 2 CuFeS 2 (s) + 4 O 2 (g) Cu 2 S(s) + 2 FeO

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Consider the following statements. Roasting is carried

Consider the following statements. Roasting is carried out to: (i) convert sulphide to oxide and sulphate. (ii) remove impurities of CuS and FeS present in the ore of tin stone (S n O 2 ) as C u S O 4 and F e S O 4 . (iii) melt the ore. (iv) remove arsenic and sulphur impurities. Of these statements:

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Metal and Metallurgy Notes, Videos, QA and Tests Grade ...

Roasting is the process of heating a concentrated ore in the presence of ore below the melting point. The purpose of roasting is to convert a concentrated ore into oxide form. It is mainly carried out for the oxidation of sulphide ores. During roasting similar changes take place. a)Oxidation of ores takes place. ZnS+ O 2 → ZnO+ SO 2. PbS+ O 2 ...

More

Consider the following statements Roasting is

Consider the following statements Roasting is carried out to 1. convert sulphide to oxide and sulphate. 2. remove water of hydration. 3. melt the ore 4. remove arsenic and sulphur impurities

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50.5 EXTRACTION OF METALS- METALLURGY

The benefication of the ore is carried out by any of the following methods depending upon the nature of the ore an also the impurities present in the ore: 1. Hydraulic Washing, Levigation or Gravit Separation Method. This method is usually applicable to oxide ores in which the ore particles are heavier than the impurities. The powdered ore is washed with running stream of water. The lighter ...

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(a) Distinguish between ‘roasting’ and ‘calcination ...

This happens in the presence of air in order to oxidize the impurities. They are usually removed as gaseous oxides. Calcination is a process in which the ores are heated below its melting point in the absence of air. Volatile impurities like arsenic are removed by this process. Roasting is the method used for sulphide ores. Roasting is used because it is easier to purify the oxides of a ...

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