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Iron
Solidification
Gap
Carbon
Anode
Cast
Iron
Steel
Stub
Current
flow
Stubhole Anchors
Stubhole
groove
LOW RESISTANCE ANODE ASSEMBLIES FOR
ALUMINUM REDUCTION: ‘STUBHOLE ANCHORS’
The Cast Iron connection between steel stub and carbon anode shrinks
on solidification, leaving a ‘loose’ fit with significant electrical resistance
following initial anode setting.
Hatch Stubhole Anchors
are carbon steel nails
tightly driven into the
carbon, the exposed end
encased in the cast iron to
form a low electrical
resistance connection
between the iron and
anode carbon.
Stubhole Anchors reduce
stub to carbon
electrical resistance
Potential Benefits include:
• Lower power consumption and higher current capacity
• Lower stub temperature & stub damage/toe-in
• Reduce anode top surface temperature, reduced airburn and burnoffs
• Faster anode heatup and less magnetic disturbance after initial setting
Canadian patent 2838113, int’l patents pending.
Please contact Hatch to trial or license the patented Stubhole Anchor
Technology.
Will Berends
Hatch Ltd.
2800 Speakman Dr.
Mississauga, ON,
Canada, L5K 2R7
www.Hatch.ca
Features:
• Flexible, automated robotic
installation to meet rod shop
cycle time
• Carbon steel anchors are
recycled/ remelted with cast
iron
• Robotic station locates
anywhere along anode
conveyor