Stimir of Iceland has shipped a stub graphite coating system to Outokumpu Technology of Canada.
The system will be installed in the rodding plant at the greenfield smelter currently under construction at Sohar, Oman.
Graphite is applied to anode stubs prior to sealing into the carbon anode with molten cast iron. The thin graphite film significantly reduces the risk of the cast iron fusing into the surface of the stub, a phenomenon which prevents easy removal of the cast iron “thimble” when the spent anode rod is recycled. The graphite coating also improves the electrical conductivity of the thimble-to-pin interface.
Stimir’s aqueous graphite dipping system uses a proven design already supplied to other smelters, most recently to Alcan Iceland. Stub drying after dipping is by gas heating using natural gas burners.