A well-controlled process results in far fewer perfluorocarbons.
ALUMINA
FEEDER
ALUMINA
CO₂
PFCs
ANODE
ANODE
ELECTROLYTE
MOLTEN SALT BATH
ALUMINUM
CATHODE BLOCK
STEEL COLLECTOR BAR
An electric current, running from anodes at the top of
the pot to a cathode at the bottom, creates aluminum
from the mixture inside.
The process releases oxygen, which then combines
with carbon from the anodes to form carbon dioxide.
If the concentration of alumina dips too low, the
electricity will begin to break down the salt bath. When
this happens, fluorine gas released from the salt reacts
with the carbon anodes forming perfluorocarbons in a
process known as “anode effect.”
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ALUMINA
FEEDER
ALUMINA
CO₂
PFCs
ANODE
ANODE
ELECTROLYTE
MOLTEN SALT BATH
ALUMINUM
CATHODE BLOCK
STEEL COLLECTOR BAR
An electric current, running from anodes at
the top of the pot to a cathode at the bottom,
creates aluminum from the mixture inside.
The process releases oxygen, which then
combines with carbon from the anodes to
form carbon dioxide.
If the concentration of alumina dips too low,
the electricity will begin to break down the
salt bath. When this happens, fluorine gas
released from the salt reacts with the carbon
anodes forming perfluorocarbons in a
process known as “anode effect.”
An electric current,
running from anodes
at the top of the pot to
a cathode at the
bottom, creates
aluminum from the
mixture inside.
If the concentration of
alumina dips too low,
the electricity will
begin to break down
the salt bath. When
this happens, fluorine
gas released from the
salt reacts with the
carbon anodes forming
perfluorocarbons in a
process known as
“anode effect.”
ALUMINA
FEEDER
The process releases
oxygen, which then
combines with carbon
from the anodes to
form carbon dioxide.
ALUMINA
CO₂
PFCs
ANODE
ANODE
ELECTROLYTE
MOLTEN SALT BATH
ALUMINUM
CATHODE BLOCK
STEEL COLLECTOR BAR
An electric current, running
from anodes at the top of the
pot to a cathode at the
bottom, creates aluminum
from the mixture inside.
If the concentration of
alumina dips too low, the
electricity will begin to
break down the salt bath.
When this happens,
fluorine gas released from
the salt reacts with the
carbon anodes forming
perfluorocarbons in a
process known as “anode
effect.”
ALUMINA
FEEDER
The process releases oxygen,
which then combines with
carbon from the anodes to
form carbon dioxide.
ALUMINA
CO₂
PFCs
ANODE
ANODE
ELECTROLYTE
MOLTEN SALT BATH
ALUMINUM
CATHODE BLOCK
STEEL COLLECTOR BAR