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· As the future requirements are much larger than what can be obtained through even perfect recycling from urban mines, there will be a need for the primary mining of . Unfortunately, of from sulphidic , either by pyrometallurgy or hydrometallurgy, is typically associated with a relatively large eco ...read more
The process of from varies according to the type of and the desired purity of the final product. Each process consists of several steps in which unwanted materials are physically or chemically removed, and the concentration of is progressively increased.read more
· is also from oxidised including silicates, carbonates and sulphates. Here, the are crushed and ground as above, but they are then leached with sulphuric acid to produce an impure sulphate solution. The solution is purified using solvent and electrode twinning.read more
Copper is an example of this. Copper mostly occurs as sulfide ores, which are heated in air to convert them to copper II oxide. Molten copper can be produced from copper oxide by heating with...read more
of from sulphide Large amount of are obtained from pyrite CuFeS2 by smelting. containing 4% or more are treated by smelting process.read more
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 is kept in water containing pine oil and the mixture is agitated by …read more
An . is a rock that contains enough of a metal or a metal compound to make the metal worthwhile. Most metals are from found in the Earths crust.read more
Some impurities form a slag such as FeO.SiO 2 , which floats on the surface of the liquid like oil on water and is easily removed. Courtesy of Xstrata. The smelter for sulfide produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching from oxide ores.read more
Sulphide such as chalcopyrite are converted to by a dissimilar method from silicate, carbonate or sulphate . The principal of is pyrite and is from this . of from pyrites involves the following steps – Crushing and concentrationread more
· of . It is mainly from pyrites CuFeS 2. The sulphide is usually of very low grade and contains iron sulphide, gangue and smaller quantities of arsenic, antimony, selenium tellurium, silver, gold and platinum. The various steps involved in the are: 1 Crushing and concentrationread more
Mining for Bearing . There are two categories of sulphide which is processed to enrich it before smelting, and oxide that is subjected to acid treatment. The major producers of are Chile, USA and Australia, the vast majority of the coming from open pit mining.read more
In the flotation process, the finely ground ore, mixed with water and special reag , is agitated by mechanical and pneumatic devices. These produce air bubbles in the ore-water mixture, or slurry. The reagents provide an attraction between the surface of the copper minerals and the air bubbles.read more
C s +Cu 2 O s → 2Cu s + CO g Hence, the extraction of copper from its pyrite ore is difficult than from its oxide ore through reduction. Previous Question …read more
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