Many metals are found in the earth's crust as ores. When the
metal is dug up, a method must be used to separate the metal
from the rest of the ore. This is called extracting the metal.
,THE OCCURANCE AND EXTRACTION OF METALS
•Most metals are found as ores.
•Chemically, an ore consists of minerals,
(compounds of the metal), mixed with gaunge,
(worthless earthy material). An ore is any
naturally-occurring source of a metal that you c
economically extract the metal from.
, CLASSIFICATION OF METAL ORES
• Type 1 ores
• These are ores of electropositive metals which are found as soluble salts. (Gro
e.g nitrates and chlorides). The metal is extracted from the ore by electrolytic
techniques.
• Type 2 ores
• These are ores of electropositive metals which are found as insoluble salts. (So
group II ores, e.g carbonates). They are extracted by electrolysis.
• Type 3 ores
• These metal ores are found as oxides and mixed oxides. A variety of extract
methods are used; e.g electrolysis and chemical reduction. C, CO or a more r
metal can be used for reduction. Early transition metals e.g Ti, Cr and Mn fall
group.
metal is dug up, a method must be used to separate the metal
from the rest of the ore. This is called extracting the metal.
,THE OCCURANCE AND EXTRACTION OF METALS
•Most metals are found as ores.
•Chemically, an ore consists of minerals,
(compounds of the metal), mixed with gaunge,
(worthless earthy material). An ore is any
naturally-occurring source of a metal that you c
economically extract the metal from.
, CLASSIFICATION OF METAL ORES
• Type 1 ores
• These are ores of electropositive metals which are found as soluble salts. (Gro
e.g nitrates and chlorides). The metal is extracted from the ore by electrolytic
techniques.
• Type 2 ores
• These are ores of electropositive metals which are found as insoluble salts. (So
group II ores, e.g carbonates). They are extracted by electrolysis.
• Type 3 ores
• These metal ores are found as oxides and mixed oxides. A variety of extract
methods are used; e.g electrolysis and chemical reduction. C, CO or a more r
metal can be used for reduction. Early transition metals e.g Ti, Cr and Mn fall
group.
