Liquid cast iron is also used in Aluminum smelter to seal/attach the large anodes on their support (support is called “hexapodes”). Small ovens are used to melt the cast iron at over 900 deg C.
It is necessary to remove the dross containing the impurities which are forming on the top of the oven. Operators use spoons/shovels to remove the dross. In most cases this is done manually with the operator standing as close as possible to the oven.