Business & products

SEC CARBON's cathode blocks for aluminum smelting are used as cathodes for electrolysis of alumina and exported to aluminum producing countries in the world.
The SK-Block was developed by graphitizing the entire cathode block for the first time in the world. They offer higher thermal and electric conductivity and higher resistance against thermal shock and bath than the conventional products made by merely baking with addition of anthracite or graphite. The SK-Block contribute to energy saving, higher productivity, and longer life of furnaces.
We have been developing such products as meet worldwide needs and now hold a high market share of over 50%.

Cathode blocks vary in characteristics depending on the differences in carbon as a raw material and production method. One of the large quality differences between the SK-Block and the conventional amorphous carbon or graphitic blocks is that the SK-Block is superior in thermal and electric conductivity and resistance against thermal shock and bath.

	•	Place SK-Block at the bottom of an aluminum reduction pot.
	•	Fill the pot with electrolyte and immerse anodes.
	•	Send current of approx 100,000 to 300,000 A to the electrolyte. Carry out electrolysis while continuously feeding alumina and then take out aluminum.

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