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Question 6 2i Given below are the steps for extraction of copper from its ore. Write the reaction involved.a Roasting of copper I sulphide.b Reduction of copper I oxide with copper I sulphide.c Electrolytic refining.ii Draw a neat and well labelled diagram for electrolytic refining of copper.
The chemistry of roasting is very complicated and could cause many different reaction but the main reactions during roasting process are the oxidation of copper and iron, sulphides to sulphates and oxides. Some reaction could be as follow: 2 MeS + 3 O 2 =2 MeO + 2SO 2. CuFeS 2 + 4 O 2 = CuSO 4 +FeSO 4. 2CuFeS 2 +7O 2 = CuO.CuSO 4 + Fe 2 O 3 + 3 ...
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;
A typical flowsheet for this process calls for three- stage crushing of original ore to a minus 10 mesh product; mixing of crushed ore with small quantities of common salt and fine coke and roasting of this mixture in a kiln at 750°C in a controlled atmosphere.
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.
Copper ore contains sulfur, and heap roasting was a way to burn away the sulfur in the copper-so they'd be left with something closer to pure copper.Well, in the process, large vats of raw copper ore are burned slowly-for, um, two or three months, actually-to lower the sulfur content.And this burning-well, let's look at the results: first, the ...
The chemistry of roasting is very complicated and could cause many different reaction but the main reactions during roasting process are the oxidation of copper and iron, sulphides to …
Dead roasting is the most commonly used roasting process and is mainly applied in our zinc roasters. When using a dead-roasting process for concentrates, the sulfides are completely transformed into oxides. The gas temperature in this type of plant is typically between 900 and 950°C. The hot gas generated in the process is used for heat recovery
The partial roasting process for copper concentrates is a single-stage roasting process. The impurities are volatilised and the process produces calcine, which is rich in copper sulphide but has a ...
Fig. 1 Particle size distribution of the pulverized copper-bearing ore sample. Table 1 Chemical compositions of the copper-bearing ore samples. Fig. 2 XRD patterns of the copper-bearing ore samples used in this study. Fig. 3 A schematic illustration of experimental apparatus for roasting. Collectors: (a) H 2O, (b) NaOH, (c) BaCl 2, (d) AgNO 3.
Roasting: Calcination is a process in which ore is heated in the absence of air or air might be supplied in a limited quantity: Roasting involves the heating of ore lower than its melting point in the presence of air or oxygen. Calcination involves the thermal decomposition of carbonate ores. Roasting is carried out mostly for sulfide minerals.
To further extract copper from the roasted ore, a subsequent step involving reduction is required. This reduction step typically involves heating the roasted ore with a suitable reducing agent such as carbon (C) or carbon monoxide (CO). ... Roasting: It is a process in which sulphide ore is heated in the presence of oxygen to convert into oxide ...
The process of extraction of copper from its ores and preparing copper metal or chemical compounds for use in various goods is known as copper processing.
A nickel-copper sulphide concentrate was treated in a pilot plant at Warren Spring Laboratory during 1961, by a hydrometallurgical roast-leach-solvent extraction process devised to cleanly separate the metal values, and produce acid sulphate liquors containing the metals.
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.
Copper Smelting Process - Free download as PDF File (.pdf), Text File (.txt) or read online for free. 1. Copper ore is mined and concentrated through processes like crushing, grinding, and flotation to produce an ore with 15-35% copper. 2. …
Extraction Metallurgy of Copper. Copper Used. Pyrometallurgy of copper Reminder: Pyrometallurgy is the use of heat to reduce the mineral to the free metal, and usually involves 4 main steps: • Calcination:thermal decomposition of the ore with associated elimination of a volatile product. • Roasting:a metallurgical treatment involving gas- solids reactions at …
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.
The valuable metals copper and zinc were successfully recovered from a water-quenched lead smelting slag containing zinc in Gansu Province. This study focuses on the application of the direct reduction roasting-flotation process for extracting these metals from the slag phase. To comprehend the recovery principle of copper and zinc minerals in the slag …
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. C u 2 S + O 2 2 C u + S O 2
The ore was processed by heap roasting to break down the copper and iron sulfides followed by heap leaching - an inexpensive and technological unsophisticated process, but also one which was only modestly successful at recovering the copper contained in the ore - in which water was percolated through the roasted ore to dissolve out any copper ...
Copper processing, the extraction of copper from its ores and the preparation of copper metal or chemical compounds for use in various products.
Copper metal can be prepared by roasting copper ore, which can contain cuprite (Cu₂S) and copper (II) sulfide. Cu₂ S (s) + O₂ (g) → 2 Cu (s) + SO₂ (g) CuS (s) + O₂ (g) → Cu (s) + SO₂ (g) Suppose an ore sample contains 10.0% impurity in addition to a mixture of CuS and Cu₂ S. Heating 100.0 g of the mixture produces 75.8 g of ...
Step by step video, text & image solution for Roasting of copper ore is carried out in which of the following furnace? by Chemistry experts to help you in doubts & scoring excellent marks in Class 12 exams.
Two steps involved in the extraction of copper metal from concentrated copper glance ore are: 1. Roasting: Copper glance, being a sulphide ore, is heated in the presence of air. Copper (I) sulphide is converted to copper (I) oxide. Copper (I) oxide, so formed, reacts with non-oxidised copper (I) sulphide ore in the absence of air to form copper ...
[01:44.35] It wasn't the mining itself that caused such massive destruction. [01:49.04] It was what happened after the copper ore was extracted from the mines. [01:53.44] It was a process called heap roasting. [01:56.77] Copper ore contains sulfur.
Mining is the initial phase in the extraction process. Copper ore must be extracted using either open-pit or subterranean techniques. ... The flotation concentrate is subsequently dewatered and filtered to generate filter cake, which is sent to a copper smelter. Roasting. Often, reverberating furnaces are utilized during the roasting procedure ...
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) thickening, 3) smelting, and 4) electrolysis.
The key process requirements for arsenic removal from metal concentrates (copper and nickel) and ores (gold) by roasting are summarized from open literature.
Roasting, the first step in many copper smelters, was chosen for initial investigation because of the potential for arsenic removal in this primary process. Simple, static-bed, …
Roasting is a simple and efficient method for treating complex copper-bearing mate-rials and provides advantages in terms of economic efficiency and environmental friendliness when …
Copper ores are the largest potential domestic source of arsenic. During copper smelting, arsenic is diluted and emitted in the gas and slag streams, necessitating special collection and handling procedures. Roasting, the first step in most copper smelters, is relatively inefficient as an arsenic removal process.
