Electrometallurgy Flashcards
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The branch of process metallurgy dealing with the
use of electricity for recovery or refining of metals.
The electrochemical effect of an electric current
brings about the reduction of metallic compounds
or Ions
Electrometallurgy
extraction of metals
electrowinning
purification of metals
electrorefining
PREREQUISITES
1) Separate sites where
____and____
reactions could occur
2) A path through which the
____ could pass
3) A medium through which the
____ could pass
- Oxidation,Reduction
- Electron
- Ions
electrolytic cell
The electrolyte contains ____ (made up of M^x cations and X^- anions)
MX
ELECTROLYTIC CELL
Anode is ____
Positive
ELECTROLYTIC CELL
____(loss of electrons) occur at the ____
Oxidation, Anode
electrolytic cell
Cathode is ____
Negative
ELECTROLYTIC CELL
____(gain of electrons) occurs at the ____
Reduction, Cathode
electrolytic cell
____(X^-) flow towards the ____ (positive electrode)
Anions, anode
electrolytic cell
____(M^+) flow towards the ____ (negative electrode)
Cations, cathode
electrolytic cell
Electrons flow from the ____ (+) to the ____ (-) through the wires connecting the electrodes to the power supply
Anode, Cathode
refers to the
process of
using electrolysis to
increase the purity of a
metal extracted from its ore
(compound or mixture of
compounds from which a
metal can be extracted
commercially).
Electrorefining
ELECTROREFINING PRINCIPLES
The ____ , positive electrode, is the impure metal to be ____.
Anode, Purified
ELECTROREFINING PRINCIPLES
____, loss of electrons, occurs at the anode
Oxidation
ELECTROREFINING PRINCIPLES
The ____, negative electrode, is the electrode at which the pure metal will be ____
Cathode, deposited
ELECTROREFINING PRINCIPLES
____, gain of electrons, occurs at the cathode
Reduction
ELECTROREFINING PRINCIPLES
the electrolyte is either a _____ or an ____ of the metal ions
molten salt, aqueous solution
ELECTROREFINING PRINCIPLES
Electrorefining can be used to purify a number of metals including _______.
LIMA KA METALSSS
copper
nickel
cobalt
lead
tin
ELECTROREFINING COPPER
ANODE
- Impure ____
- ____ occurs at the anode.
- ____ is oxidized at the anode.
- ____ are produced at the
anode. - Electrons flow from ____ to
____ - Anode ____.
- ____ ions migrate to cathode.
- Copper
- Oxidation
- Copper
- Electrons
- Anode to cathode
- Disintegrates
- Copper
ELECTROREFINING COPPER
CATHODE
- ____ (thin copper foil or stainless steel blanks).
- ____ occurs at the cathode.
3.____ ions migrate to the cathode. - Copper ions are____ at the cathode.
- Solid copper is ____ at the cathode.
- Starter Sheets
- Reduction
- Copper
- Reduced
- Deposited
refers to the process of using electrolysis to
extract a metallic element from the
compounds in its ore.
Electrowinning
STAGES BEFORE ELECTROWINNING
- Mining
- Crushing
- Grinding
- Concentrating
- Leaching
- Electrowinning
ELECTROWINNING COPPER
ANODE
- ____ plates
- ____ occurs at the anode.
- ____ is oxidized at the anode.
- Water is ____ at the anode.
- ____ gas and protons are produced
at the anode. - ____are produced at the anode.
- ____ flow from anode to cathode.
- ____ions migrate to cathode.
- lead alloy
- Oxidation
- Water
- Consumed
- Oxygen
- Electrons
- Electrons
- Copper
ELECTROWINNING COPPER
CATHODE
- ____sheets (starter sheets) or ____ sheets (blanks)
- ____ occurs at the cathode.
- ____ ions migrate to the cathode.
- Copper ions are ____ at the cathode.
- Solid copper is ____ at the cathode.
- thin copper, stainless steel
- reduction
- copper
- reduced
- Deposited
