Abstract: Provided below the funnel-shaped outlet opening of a receptacle filled with wet slag sand is an outlet funnel which is closed to begin with and forms a conical annular gap around the receptacle. This gap fills with slag sand, as a result of which dewatering occurs according to the principle of the siphon effect.

Abstract: An apparatus for regulating the feed or delivery of hot air in the tuyere stock of a shaft furnace, and a tuyere stock which incorporates such a regulating apparatus is presented. The regulating apparatus may be used in conjunction with a tuyere stock for a shaft furnace (the structure of which is well known) and consists of an articulated pipe connecting a large circular conduit to a nozzle and which is fitted internally with a refractory lining having an internal channel therethrough for the passage of air. The regulating apparatus of the present invention comprises a valve substantially in the form of a disc which is adapted to operate in a spherical portion of the internal channel described above. The disc is removably mounted on the end of a rod, the rod being rotatably and hermetically mounted in a tubular support integral with the wall of the tuyere stock and connected on the outside thereof to a mechanism which serves to pivot both the rod and the valve about the longitudinal axis 0 of the rod.

Abstract: A method and apparatus are presented for granulation of molten slag for determining the flow of molten slag and adjusting the supply of granulation water in accordance with the flow of molten slag.