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Why is it advantageous to roast a sulphide ore to the ...

Why is it advantageous to roast a sulphide ore to the oxide before reduction? Sulphide ore is roast to the oxide before reduction because metal oxides can be reduced to metal by carbon and hydrogen much more easily than sulphides.

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Why is it advantageous to roast a sulphide ore to the ...

$\begin{array}{1 1} \text{(a) Sulphide ore is roasted to the oxide before reduction because metal oxides can be reduced to Non - metal by carbon and hydrogen much more easily than sulphides.} \\ \text{(b) Sulphide ore is roasted to the oxide before reduction because metal oxides can be reduced to metal by carbon and hydrogen much more easily than sulphides. }\\ \text{(c)Sulphide ore is roasted ...

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give reason why roasting is carried out on sulphide ores ...

2018-3-17 · So before reduction can be done, the ore is converted into metal oxide. The concentrated ores can be converted into metal oxide by calcination or roasting. Calcination : It is the process in which a carbonate ore is heated strongly in the absence of air toconvert it into a metal oxide.

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Why are Sulphide Ores converted to Oxide before

2021-10-22 · Why are Sulphide Ores converted to Oxide before Reduction. In contrast with its sulphide and carbonate, it is easier to obtain a metal from its oxide because when we extract metal from its respective ore, we have to conduct calcination or roasting steps in which metal carbonates and sulphides are converted into metal oxides.

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Why is sulphide ore converted to its oxide before ...

2018-6-14 · A sulphide ore is converted into oxide ore by roasting. It is the process of heating the concentrated ore in the presence of excess air. Volatile impurities also get expelled. Zinc sulphide in its ore zinc blende ( ZnS) is roasted to obtain zinc oxide (ZnO). Mercuric oxide is obtained by roasting cinnabar (HgS) in air.

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A sulphide ore is generally roasted to oxide before ...

A sulphide ore is generally roasted to oxide before reduction, because we (a) the enthalpy of formation of CO2 is more than that of CS2 (b) a metal sulphide is generally more stable than the metal oxide (c) a sulphide ore cannot be reduced at all (d) no reducing agent is

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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 known as roasting.

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Smelting and Roasting Ores to recover gold, silver and ...

2014-6-26 · The process works best when the ore is crushed to small pieces before roasting. Additives, such as common rock salt are often added to the mix before it is heated to enhance the reaction of the sulfides. Once the ores are fully roasted, and

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why are carbonate ores are calcined while sulphide ores ...

2019-3-20 · Roasting: It is the process in which a sulphide ore is strongly heated in the presence of air to convert it into a metal oxide. This is done in case of sulphide ores so as to remove sulphur in the form of SO 2 and to obtained corresponding metal oxide.

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Why Is Sulphide Ore Roasted Before Reduction? - BYJU’S

Why Is Sulphide Ore Roasted Before Reduction. To convert the sulphide ore into its respective oxide, it is first roasted. To learn more about the calcination and roasting process in detail, visit BYJU’S!! 12.

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Why are Sulphide Ores converted to Oxide before

2021-10-22 · Why are Sulphide Ores converted to Oxide before Reduction. In contrast with its sulphide and carbonate, it is easier to obtain a metal from its oxide because when we extract metal from its respective ore, we have to conduct calcination or roasting steps in which metal carbonates and sulphides are converted into metal oxides.

Read More
why is sulphide ore roasted before reduction - Chemistry ...

2013-11-13 · A sulphide ore is converted into oxide ore by roasting. It is the process of heating the concentrated ore in the presence of excess air. Volatile impurities also get expelled. Zinc sulphide in its ore zinc blende ( ZnS) is roasted to obtain zinc oxide (ZnO). Mercuric oxide is obtained by roasting cinnabar (HgS) in air.

Read More
Why is it advantageous to roast a sulphide ore to the ...

$\begin{array}{1 1} \text{(a) Sulphide ore is roasted to the oxide before reduction because metal oxides can be reduced to Non - metal by carbon and hydrogen much more easily than sulphides.} \\ \text{(b) Sulphide ore is roasted to the oxide before reduction because metal oxides can be reduced to metal by carbon and hydrogen much more easily than sulphides. }\\ \text{(c)Sulphide ore is roasted ...

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give reason why roasting is carried out on sulphide ores ...

2018-3-17 · So before reduction can be done, the ore is converted into metal oxide. The concentrated ores can be converted into metal oxide by calcination or roasting. Calcination : It is the process in which a carbonate ore is heated strongly in the absence of air toconvert it into a metal oxide.

Read More
A sulphide ore is generally roasted to oxide before ...

A sulphide ore is generally roasted to oxide before reduction, because we (a) the enthalpy of formation of CO2 is more than that of CS2 (b) a metal sulphide is generally more stable than the metal oxide (c) a sulphide ore cannot be reduced at all (d) no reducing agent is

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ROASTING OF SULFIDE MINERALS - Wiley Online Library

2017-8-22 · 10. Other reduction or oxidation reactions such as 3M 3O 4ðÞs +MS sðÞ=10MO sðÞ+SO 2ðÞg ð2:18Þ Ms,lðÞ+SO 2ðÞg =MS sðÞ+O 2ðÞg ð2:19Þ Where more than one metal sulfide is present in the concentrate, the reactions are trulycomplex and

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why are carbonate ores are calcined while sulphide ores ...

2019-3-20 · Roasting: It is the process in which a sulphide ore is strongly heated in the presence of air to convert it into a metal oxide. This is done in case of sulphide ores so as to remove sulphur in the form of SO 2 and to obtained corresponding metal oxide.

Read More
Calcination and Roasting: An Overview and Explanation

2021-10-31 · Ques: Why do the sulfide ores ensure the roasting process, and carbonate ore is calcined? (2 marks) Ans: In the roasting process, sulfide ore heats in the air and converts to metal oxide. But, in the case of carbonate ore, the moisture and carbonate are eliminated through the calcination process. Hence, roasting is inapplicable for carbonate ores.

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Which of the following statements, about the advantage of ...

2018-12-24 · Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true? (a) The Δ G f ° of the sulphide is greater than those lbr CS 2 and H 2 S. (b) The Δ G f ° is negative for roasting of sulphide ore to oxide. (c) Roasting of the sulphide to the oxide is themodynamically feasible.

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give reason why roasting is carried out on sulphide ores ...

2018-3-17 · So before reduction can be done, the ore is converted into metal oxide. The concentrated ores can be converted into metal oxide by calcination or roasting. Calcination : It is the process in which a carbonate ore is heated strongly in the absence of air toconvert it into a metal oxide.

Read More
Smelting and Roasting Ores to recover gold, silver and ...

2014-6-26 · The process works best when the ore is crushed to small pieces before roasting. Additives, such as common rock salt are often added to the mix before it is heated to enhance the reaction of the sulfides. Once the ores are fully roasted, and the sulfur is driven off, the extraction of the gold or silver from the ore is not especially difficult.

Read More
ROASTING OF SULFIDE MINERALS - Wiley Online Library

2017-8-22 · 10. Other reduction or oxidation reactions such as 3M 3O 4ðÞs +MS sðÞ=10MO sðÞ+SO 2ðÞg ð2:18Þ Ms,lðÞ+SO 2ðÞg =MS sðÞ+O 2ðÞg ð2:19Þ Where more than one metal sulfide is present in the concentrate, the reactions are trulycomplex and

Read More
Calcination and Roasting: An Overview and Explanation

2021-10-31 · Ques: Why do the sulfide ores ensure the roasting process, and carbonate ore is calcined? (2 marks) Ans: In the roasting process, sulfide ore heats in the air and converts to metal oxide. But, in the case of carbonate ore, the moisture and carbonate are eliminated through the calcination process. Hence, roasting is inapplicable for carbonate ores.

Read More
why are carbonate ores are calcined while sulphide ores ...

2019-3-20 · Roasting: It is the process in which a sulphide ore is strongly heated in the presence of air to convert it into a metal oxide. This is done in case of sulphide ores so as to remove sulphur in the form of SO 2 and to obtained corresponding metal oxide.

Read More
why are metals sulphide and carbonate converted into

2012-10-7 · A sulphide ore is converted into oxide ore by roasting. 1. Calcination process It is the process of heating the concentrated ore at a temperature not sufficient to melt the ore. The water content and the volatile impurities also get expelled. Zinc carbonate in its ore calamine (ZnCO 3) is calcinated to obtain zinc oxide (ZnO).

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Which of the following statements, about ... - Physical ...

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true ? Question Type: Single Correct Type 1 Roasting of the sulphide to the oxide is thermodynamically feasible 2 Carbon and hydrogen are suitable reducing agents for all metal oxide 3 The AfGº of the sulphide is greater than oxide 4 The AfGº is negative for roasting of sulphide ore to ...

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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 250 °C) were determined ...

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Roasting - an overview | ScienceDirect Topics

N. Ahern, in Gold Ore Processing (Second Edition), 2016 2.1 Oxidative Pretreatment. During roasting of gold ores and concentrates, mercury is released to the gas phase, with the extent of release dependent on the mineralogical composition of the roaster feed and on the roasting conditions (temperature, roasting atmosphere and roasting time).. In pressure oxidation, the deportment of mercury ...

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roasting | metallurgy | Britannica

Other articles where roasting is discussed: history of Europe: Control over resources: mining techniques and needed initial roasting before smelting. At the same time, they were more widely available than surface deposits, and there were sources in both central and western Europe—ores in Germany, Austria, and the Czech and Slovak Republics were exploited from the early 3rd millennium bce.

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