DE4122751

• Main Authors: YASUI, YASUHIKO, OSAKA, JP, TAMEI, AKIRA, OSAKA, JP, NAKAHARA, TAKASHI, OSAKA, JP, OSHIO, KATSUHIRO, OSAKA, JP, NISHIMOTO, MASARU, OSAKA, JP, TOZAWA, YOSHIHISA, OSAKA, JP, SUMOTO, TADAAKI, OSAKA, JP
• Format: Patent
• Language: English
• Published: 23.09.1993
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a cooling apparatus for hot bulk material, such as sintered ore. Gaps are defined between respective lower ends of side wall portions of a moveable annular air duct and respective upper ends of side wall portions of a stationary annular air duct, which gaps communicate the air passage in the stationary annular air duct with annular water seal chambers. First seal plates are disposed at respective upper ends of the side wall portions of the stationary annular air duct in relation to respective lower ends of the side wall portions of the moveable annular air duct. Second seal plates are disposed at respective lower ends of the side wall portions of the movable annular air duct. Labyrinth seals are formed by the first seal plates, the side wall portions of the moveable annular air duct, and the second seal plates in combination. This seal arrangement is entirely different from the conventional seal structure which involves sliding contact of seal members with other surfaces. Therefore, the seals are not subject to abrasion and this provides greater ease of maintenance and checking.