05 SEPTEMBER 2011China Aluminium Network
VHE to Supply Stub Straightening Machine to Romanian Aluminium Smelter
Edited by : AL CIRCLE
1 min read
Inward bending of anode stubs, generally known as "toe-in", is a well understood occurrence in all pre-bake aluminium smelters. The difference in linear expansion of the carbon anode and the steel yoke or spider of the anode rod at high temperatures in the reduction cell means that the yoke expands more than the anode, bending the stubs which are anchored in the anode block.
Stubs become bent inwards just above the iron thimble, changing the geometry of the yoke, and stubs can no longer be correcly located in the anode holes during subsequent rodding. Ultimately the stubs will no longer fit into the holes.
The machine to be supplied to ALRO will be designed for the 2x2 130mm stub diameter techonology in use at that smelter and will be delieverd in 2012.
Stubs become bent inwards just above the iron thimble, changing the geometry of the yoke, and stubs can no longer be correcly located in the anode holes during subsequent rodding. Ultimately the stubs will no longer fit into the holes.
The machine to be supplied to ALRO will be designed for the 2x2 130mm stub diameter techonology in use at that smelter and will be delieverd in 2012.
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