42096
Description
Mind Map by aislinnohanlon, updated more than 1 year ago
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Created by aislinnohanlon
about 11 years ago
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METAL ORES AND METAL
EXTRACTION FROM ORES
- ORE-is a rock that
contains enough of a
certain material to make it
worth mining
- Ores that contain sulphide must be converted to metal oxide
- ROASTING-the metal sulphide is crushed and then heated strongly in a
stream of air
- these reactions are highly
exothermic and therefore
help to reduce energy
costs
- the also prodice S02 which
contributes to acid rain
- S02 is also a raw material for making H2S04,
which is used in fertilisers, medicines, dyes,
plastic and paint
- H2S04 is manufactured using the contact process! 2S02 +02=2SO3
(V205 as catalyst). The S03 is absorbed in concentrated sulphuric acid
(OLEUM).
- The Oleum is then diuluted with water to form concentrated H2S04
- The Oleum is then diuluted with water to form concentrated H2S04
- H2S04 is manufactured using the contact process! 2S02 +02=2SO3
(V205 as catalyst). The S03 is absorbed in concentrated sulphuric acid
(OLEUM).
- S02 is also a raw material for making H2S04,
which is used in fertilisers, medicines, dyes,
plastic and paint
- these reactions are highly
exothermic and therefore
help to reduce energy
costs
- ROASTING-the metal sulphide is crushed and then heated strongly in a
stream of air
- Ores that contain sulphide must be converted to metal oxide
- REDUCTION OF METAL OXIDES
- high temperature method know as pyrometallurgy.
*electrolysis of a molten compound. *chemical reduction
using coke in the blast furnance.
- *reduction using a more reactive metal
- *reduction using a more reactive metal
- other methods use aqueous solutions which use quite low
temperatures known as hydrometallurgy. *Electrolysis of aqueous
solution.
- *Displacement of a less reactive metal using a solution of its salt using
a more reactive metal
- C is not widely used today instead some copper ores are converted into a solution containing cu2+ ions.
- this is done by spraying some copper mining with dilute acid in the presence of the bacteria of thiobacuillus ferooxidants
- it is very efficent as the bacteria will only work on low grades ores that contain little copper.
- CU2+ + FE = FE2+ + CU. The iron seems to dissolve but copper is worth more so its okay
- iron is cheap and abundant, enviromentally sounds no co is proudcued and uses much less energy.
- iron is cheap and abundant, enviromentally sounds no co is proudcued and uses much less energy.
- CU2+ + FE = FE2+ + CU. The iron seems to dissolve but copper is worth more so its okay
- it is very efficent as the bacteria will only work on low grades ores that contain little copper.
- this is done by spraying some copper mining with dilute acid in the presence of the bacteria of thiobacuillus ferooxidants
- C is not widely used today instead some copper ores are converted into a solution containing cu2+ ions.
- *Displacement of a less reactive metal using a solution of its salt using
a more reactive metal
- high temperature method know as pyrometallurgy.
*electrolysis of a molten compound. *chemical reduction
using coke in the blast furnance.
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