Milling Anodes to Remove Spikes

Under certain conditions, carbon anodes can experience spike - or mushroom - formation on the bottom surface. Such spikes quickly result in pot instability and reduced current efficiency.

Traditional remedial action had been to pull the affected anode from the pot and discard it, or remove the spike manually by breaking it off with a crowbar or sledge hammer. Such methods are inefficient, and can have health and safety implications.

VHE offers an anode milling machine which can quickly and safely remove anode spikes, allowing the partly-used anode to be used further.

The VHE Anode Milling System mills away spikes and other irregularities, improving the geometry and extending the usable life. Spiked anodes are pulled from the pots and milled whilst still hot, then returned again to the original stall. Optionally, anodes may first be cooled and then milled.

Two options are available – a machine installed in a fixed location, and a trailer-mounted mobile machine. Both designs can operate in semi-automatic and manual modes. Where total control over the process is desired, each level of the procedure can be separatey controlled. Scrap carbon is collected in a container located under the machine.

The VHE Anode Milling Machine

The VHE Anode Milling Machine – Frontal View

The VHE Anode Milling Machine – Rotary Milling Head

Velaverkstaedi Hjalta Einarssonar - VHE is a major mechanical fabricator, offering a comprehensive range of design, manufacturing and site services. VHE now provides all Stimir solutions to the primary aluminium industry, with particular focus on the Rodding Plant. All aspects of design and fabrication are undertaken at VHE’s own facilities, ensuring total quality control and on-time delivery.

Based on VHE information