Innovations: The Butte Copper Mines
The copper ore was hand roasted and concentrated with roller mills. By 1883 Daly had built his smelter 26 miles west of Butte in Anaconda. The smelter used the latest processing technology from England. He contracted with Union Pacific Railroad to build a railroad for taking the ore to the smelter and the purified copper to market.
The Recovery of Copper in Sulphide Ores by Roasting, …
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 …
Roasting of copper pyrites is done:
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.
Arsenic removal from copper–silver ore by roasting in …
The copper ore was roasted in air, in nitrogen atmosphere and in vacuum at high temperature. It was found that arsenic was more easily removed in vacuum at lower temperature with shorter time. By suitably adjusting the main reaction conditions, almost 98.97% arsenic could be removed, while most of the sulfur was particularly retained in the ...
Solved The "roasting" of 100.0 g of a copper ore yielded
The "roasting" of 100.0 g of a copper ore yielded 75.4 g of 89.5 % pure copper. If the ore is composed of Cu2S and CuS with 11.0 % inert impurity, calculate the percent of Cu2S in the ore. The equations are. Cu2S + O2 -> 2Cu + SO2 and CuS + O2 -> Cu + SO2
Copper metal can be prepared by roasting copper ore, …
Copper metal can be prepared by roasting copper ore, which can contain cuprite (Cu 2 S) and copper (II) sulfide. Cu 2 S ( s ) + O 2 ( g ) CuS ( s ) + O 2 ( g ) → 2 Cu ( s ) + SO 2 ( g ) → Cu ( s ) + SO 2 ( g ) Suppose an ore sample contains 11.0% impurity in addition to a mixture of CuS and Cu 2 S Heating 100.0 g of the mixture produces 75. ...
12.3 Primary Copper Smelting
Roasting is performed in copper smelters prior to charging reverberatory furnaces. In roasting, charge material of copper concentrate mixed with a siliceous flux (often a low-grade copper …
Thermal roasting behavior and kinetics of African cobalt-rich …
African cobalt-rich copper sulfide ore (CRCS) is an important copper-cobalt resource. The CRCS mainly contains chalcopyrite (CuFeS 2), pyrite (FeS 2), and carrollite …
Roasted was copper ore with the following (weight
Roasted was copper ore with the following (weight %) composition (dry analysis): Cu: 8.8 ; SiO2 : 19.0 ; Fe: 29.7 ; Al2O3 : 5.6 ; CaO: 0.3 ; S: 36.6 The wet ore carried 9% H2O. The ore was roasted down to a sulphur content of 6.8%, dry. Assume that 5% of the copper forms CuO and the remainder stays un-oxidised as Cu2S.
Answer in General Chemistry for maria #114839
Copper metal can be prepared by roasting copper ore, which can contain cuprite (Cu2S) and copper(II) sulfide. Cu2S(s)+O2(g)-->2 Cu(s) +SO2(g) CuS(g)+O2(g)-->Cu(s)+ SO2(g) Suppose an ore sample contains 11.0% impurity in addition to a mixture of CuS and Cu2S . Heating 100.0 g of the mixture produces 76.3 g of copper metal with a purity of 89.3%.
Application of Sulfide Copper Ores Oxidizing Roasting …
The products of oxidation roasting of sulfide copper ores can be considered as an effective sulfiding agent and collector of valuable metals during smelting of nickeliferrous …
With the help of suitable chemical equations, list the two …
The reduction is accomplished by using a reducing agent, which reacts with the metal oxide present in the roasted or calcined ore. Let's take an example of the roasting of a sulfide ore to extract copper: Roasting of copper sulfide ore (CuFeS2): 2CuFeS2(s) + 3O2(g) → 2CuS(s) + 2FeO(s) + 2SO2(g) In this case, the ore, copper iron sulfide ...
Mixed Copper and Gold Ore Concentrates Processing
The roasting step involves heating the ore in the presence of air or oxygen to convert the sulfides to oxides. ... Sceresini, (2005), and Dunne, (2016), The collector used for gold and copper ore ...
Roasting in Metallurgy
Roasting Copper Pyrites. The decomposition of the copper sulphate formed in the furnace leaves a mixture of cuprous and cupric oxides, both soluble in chlorine. Galena, PbS – Roasting. ... If a large amount of salt is used, it is desirable to leach the roasted ore with water, before treating it with chlorine gas, in order to remove the ...
Roasting Copper Ore
TheRecovery of Copper from Copper ores by roasting at,,Copper ores, containing both a combination of sulfide minerals (chalcopyrite) and those containing malachite azurite minerals, were studied for the preparation of micro-nutrients of copper by leaching and roasting. [2] The study of copper as a micronutrient produced from copper powder and ...
Pure copper can be obtained by roasting copper ore with …
Answer to Pure copper can be obtained by roasting copper ore with carbon...
Pyrite as a sulfidation agent in chrysocolla sulfidation roasting …
Sulfidation roasting resulted in a notable increase in copper recovery of approximately 75 percentiles, with an achieved copper recovery of 87.31 %. Optimal roasting conditions were a pyrite and chrysocolla molar ratio of 0.6:1.0, a temperature of 700 °C, and a roasting time of 15 min.
Steps in the roasting of copper i the concentrated
2Cu,S (5)° Copper glance ore +30,( —s 2Cu,0(s) Copper oxide (if) When a good amount of copper (1) sulphide has been converted into copper (1) oxide, then the supply of air for roasting is stopped. In the absence of air, copper (1) oxide reacts with the remaining copper (1) sulphide to form copper metal and sulphur dioxide.
Roasting in Metallurgy
Even if no silver is present, an ore must be roasted with salt if it contains much copper (as sulphide, or as an oxidised salt), lime, magnesia, or other substance which, after being subjected to an oxidising roasting, is …
Silica is added to roasted copper ore during extraction in …
Silica is added during smelting in order to remove iron oxides from copper sulphide and oxides. During roasting the iron sulfides react with oxygen (in air or oxygen enriched air) to produce iron oxides (mainly as F e O, but with some magnetite (F e 3 O 4)) and sulfur dioxide.
roasting copper ore
OXIDATION-ROASTING-OF-A-COPPER-SULFIDE-ORE-Copy-1.… Since a sulfide copper ore is insoluble in a dilute sulfuric acid, the ore should be converted into oxides. Theoretically, the correct temperature of roasting should exist between 600°C and 650°C. Three samples of 20 g of copper ore were roasted at 600°C.
The roasting of 100 g copper ore yielded 75.4 g …
The roasting of 100.0 g of a copper ore yielded 71.8, g pure copper. If the ore is composed of C u 2 S and C u S with 4.5 % inert impurity, calculate the per cent of C u 2 S in the ore.
Roasting of copper ore
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Copper processing
Occasionally adopted in preference to smelting (or pyrometallurgy, as it is generally known), leaching, or hydrometallurgy, is carried out at lower temperatures and …
A study of recovery of copper and cobalt from copper…
Through this study, 95% copper and 90% cobalt were shown to be leachable from a DRC copper–cobalt ore by ammonium roasting at the following optimal conditions: the particle size of 0.10 mm, chlorine ammonium to ore mass ratio of 1:2, roasting temperature of 300 °C, roasting time of 3 h, leaching time of 0.5 h and leaching temperature of 60 ...
A Copper metal can be prepared by roasting copper ore, …
A Copper metal can be prepared by roasting copper ore, which can contain cuprite (Cu 2 S) and copper (11) sulfide. Cu 2 S (s) + O 2 (g) CuS (s) + O 2 (g) → 2 Cu (s) + SO 2 (g) → Cu (s) + SO 2 (g) Suppose an ore sample contains 11.0% impurity in …
Roasting of copper ore is carried out in which of the …
Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt. asked Dec 28, 2019 in Chemistry by anshusingh (24.2k points) class-12; mettalurgy;
The 'roasting' of 100.0 g of a copper ore yielded 71.8 g pure …
The 'roasting' of 100. 0 g of a copper ore yielded 71. 8 g pure copper. If the ore is composed of Cu 2 S and CuS with 4. 5 % inert impurity, The percent of Cu 2 S in the ore is ab.c, then (a+b) - c value is . Cu 2 S + O 2 2 Cu + SO 2 and CuS + O 2 Cu + …
Arsenic extraction from copper concentrate using controlled …
The optimal roasting conditions was concluded to be roasting temperature of 700 °C, roasting time of 30 min, roasting flow rate of 1 L/min, and roasting oxygen content of 4 …
Roasting of copper pyrites is done:
Given below are the steps for extraction of copper from its ore. Write the reaction involved. (i) Roasting of copper (I) sulphide. (ii) Reduction of copper (I) oxide with copper (I) sulphide. (iii) Electrolytic refining (b) Draw a neat and well labelled diagram for electrolytic refining of copper.