Abstract: A channel arrangement for discharging molten metal from a smelting furnace, includes a channel (2) with two sidewalls (4, 5) and a channel bottom (6) made of a fireproof material. The channel (2) is arranged within a formwork trough (3) having receiving spaces (14) abutting lateral formwork walls (12, 13). A respective transversely moveable push wall (7, 8) is associated with each of the formwork walls (12, 13), while the receiving space (14) can be filled with a fireproof material, thereby providing a replacement sidewall. As soon as a channel (2) is worn, the channel is taken out of service and the bottom region is exposed. The remaining portion of the sidewalls (4, 5) together with the replacement sidewalls positioned in the receiving space (14) is displaced by a predetermined distance, and subsequently a fireproof material is poured into the channel bottom (6) as well as into the new receiving space (14) created behind the replacement sidewalls.