The most common hydrometallurgical process is leaching which involves the dissolution of the valuable metals into the aqueous solution After the solution is separated from the ore solids the solution is often subjected to various processes of purification and concentration before the valuable metal is recovered It is very hard to imagine a life without metals Before we start to discuss how to obtain metals from their ores we are going to learn about their uses first You would be more interested to know how industries extract metals once you are aware of their importance

THE EXTRACTION OF METALS

05 09 2013THE EXTRACTION OF METALS - AN INTRODUCTION This page looks at the various factors which influence the choice of method for extracting metals from their ores including reduction by carbon reduction by a reactive metal (like sodium or magnesium) and by electrolysis Details for the extraction of aluminium copper iron and titanium are given in

Base metals are any nonferrous (they contain no iron) metals that are neither precious metals nor noble metals The most common base metals are copper lead nickel tin aluminum and zinc Base metals are more common and more readily extracted than precious metals which include gold silver platinum and palladium

There are 3 main methods of extracting metals from their ore They are reduction of the ore with carbon reduction of the molten ore by electrolysis and reduction of the ore with a more reactive metal Extraction using carbon Metals such as zinc iron and copper are present in ores as their oxides Each of these oxides is heated with carbon

The barren rock or gangue has to be separated from the sulfide minerals in order to smelt the metallic copper from the ore By far the greatest proportion of copper is extracted from the sulfides of copper iron and sometimes other metals Such ores originate from sulfur-bearing volcanic magmas which have separated into metal sulfides and siliceous melts

The exact mechanism of biological metal extraction from anthropogenic metal-rich waste material on the other hand has been long debated Metals are found often as alloys in which they are in their nonvalent elemental form in WEEE The process requires an additional energy source for the bacteria i e iron and sulfur for the autotrophs and

Extraction of Metals: General Principles of Extraction of

Oxidised ores : In these ores Metals re present as their oxides or oxysalts such as carbonates nitrates sulphates phosphates silicates etc Halide ores : Metallic halides are very few in nature Chlorides are most common 2 METALLURGY: The whole process of obtaining a pure metal from one of its ores is known as metallurgy

To be useful the metals have to be extracted from whatever they are mixed with A metal ore is a rock containing a metal or a metal compound in a high enough concentration to make it economic to extract the metal The method used to extract metals from the ore in which they are found depends on their reactivity

Abstract This chapter provides concise information on the history natural occurrence most common minerals and ores extraction processes industrial preparation applications and uses and the major physical and chemical properties of the ferrous metals namely: iron (Fe) nickel (Ni) cobalt (Co) and manganese (Mn) and their alloys Several tables containing

Extractive metallurgy is a branch of metallurgical engineering wherein process and methods of extraction of metals from their natural mineral deposits are studied The field is a materials science covering all aspects of the types of ore washing concentration separation chemical processes and extraction of pure metal and their alloying to suit various applications

The process of extracting the metals from their ores and refining them is calledmetallurgy The choice of the process depends upon the nature of the ore and the type of the metal The metal content in the ore can vary depending upon the impurities present and chemical composition of the ore Some common steps involved in the extraction of

The most common hydrometallurgical process is leaching which involves the dissolution of the valuable metals into the aqueous solution After the solution is separated from the ore solids the solution is often subjected to various processes of purification and concentration before the valuable metal is recovered

P rinciples of Metal Extraction: Metals are found in the combined state in ores where they exist as positive ions During the extraction of metals the metallic ions must first be reduced to the corresponding metal atoms This reduction process can be done electrolytically or by thermal or chemical methods

The method used to extract a metal from its ore depends upon the stability of its compound in the ore which in turn depends upon the reactivity of the metal * The oxides of very reactive metals such as aluminium form stable oxides and other co

gold extraction from its ore

gold extraction from its ore available for the extraction of gold metal from its ores Amongst these methods cyanidation is the most common method used in the leaching of gold from the ore This process involves the dissolution of gold containing ores in dilute cyanide solution in the presence of lime and oxygen For refractory ores such as

Most of the other metals however occur in the earth's crust in the combined form i e as compounds with different anions such as oxides sulphides halides etc In view of this the study of recovery of metals from their ores is very important In this lesson you shall learn about some of the processes of extraction of metals from their ores

Most Common Metal Ores Aluminum is one of the most common elements in the Earth's crust and is found in a variety of silicate ores which are often a type of clay As the minerals become weathered they are broken down into hydrated aluminum oxide which is known as bauxite

for economic extraction is called a metal ore Economic extraction means that the cost of getting the metal out of the ore is sufficiently less than the amount of money made by selling the metal The most common metal ores are oxides and sulfides Sulfides are the oldest ores formed in the Earth's history when there was a lot of sulfur from

The ancients were very adept at finding ways to extract metals from ores Doubtless much of their efforts arose from chance and good luck paying attention to what happened to rocks of different types when they were used for heating pottery or