RATH: Successful refractory relining for hearth-type melting furnace
The requirements were demanding: The removal and relining of a tilting hearth melting furnace was to be completed as rapidly as possible during the 2022 Christmas holidays and turn of the year. An additional major challenge of the project: The burner technology in the top furnace was simultaneously rebuilt with major interventions in the steel structure of the furnace.
The RATH specialists succeeded in carrying out the technically demanding lining in only 21 days. 75m3 were lined with a total of 115 tons of refractory material – 17 tons of which in the form of precast concrete components weighing between 230 and 530 kilograms. The floor, ramp, bridge and lower side wall were lined with the proven component concept. Furthermore, the furnace was heated up externally, with concomitant thermographic monitoring as well as additional control of the heating depending on the steam pressure in the concrete area in order to achieve optimum quality.
Now Nachrodt benefits from longer service life of the refractory lining, high operational reliability, low wear, and better cleaning. The prefabricated, heat-treated and factory-tested components ensure higher quality than possible with on-site lining.
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