HYDRO ALUMINIUM’S HISTORICAL EVOLUTION OF CLOSED TYPE ANODE BAKING FURNACE TECHNOLOGY

摘要

The paper summarizes the historical evolution of the closed anodebaking furnace technology from the Riedhammer design to theHydro Aluminium concept in the Norwegian carbon plants; ?rdaland Sunndal over the last 50 years.The increasing demand for higher production and larger anodesduring the last 30 years has required Hydro Aluminium (HAL) todesign a proprietary high capacity HAL baking furnace concept.Some major aspects and challenges connected to the rebuilding ofthe furnaces are described, including maximum utilisation of theexisting factory space, allowing a low CAPEX per annualproduction capacity.Development of new repair and maintenance methods for criticalrefractory parts were essential in order to maintain a high anodequality and to extend the furnace service life.Main improvements related to the process control, process safetyand performance data of the current technological status arepresented.