PERFECCIONAMIENTOS EN HORNO-TUNEL

摘要

1. Tunnel furnace with a sand seal for a tunnel furnace wagon having a sealing apron which extends into the sand seal, characterized in that there is a device for clearing sand, which from time to time keeps sand-free that area of the sand seal wherein the tunnel entrance-facting end of the sealing apron of the last wagon to enter the furnace is located when the next furnace wagon is brought in to join up with the last wagon.