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TRIMET Puts New Anode Baking Furnace into Operation

Metal News - Published on Fri, 15 May 2020

Image Source: TRIMET Aluminium
TRIMET Aluminium SE’s aluminium smelter in Hamburg commissioned a new baking furnace for the production of carbon anodes. The new brick-lined ring chamber furnace with 48 chambers replaces an eight-year-old furnace, ensuring greater energy efficiency. A modern firing system also contributes to this, with a gas burner that makes more efficient use of energy while simultaneously producing less emissions. In addition, the furnace integrates optimized materials: the bricks used for the furnace walls are easier to heat, so that considerably less energy is required.

Carbon anodes are needed for the production of primary aluminium. In fused-salt electrolysis, liquid aluminium is produced from the chemical reaction of the source material aluminium oxide with carbon by means of electric current. The anodes assume the functions of conductor and reactant in this process.

The TRIMET plant in Hamburg produces anodes for its own metal production and for the TRIMET aluminium smelter in Essen. About 120,000 tons of carbon anodes are fired annually in the anode plant. Petroleum coke mixed with coal tar pitch is made conductive through the thermal firing process in the furnace. In a process lasting 18 days, the 1.6 meter long and nearly 1.2 ton anode bodies are gradually heated up to 1,100° Celsius in the combustion chambers before being cooled down again.

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Posted By : Yogender Pancholi on Fri, 15 May 2020
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