NOZZLE FOR INJECTING POWDERY MATERIAL

• Main Authors: FUKUDA KAZUHISA, AOKI RIICHI, NOBEMOTO AKIRA, KUMAZAWA HIROYUKI
• Format: Patent
• Language: English
• Published: 18.06.2009
• Subjects: BLASTING; CHEMISTRY; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OVENS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; RETORTS; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; WEAPONS

PROBLEM TO BE SOLVED: To provide a nozzle for injecting powdery material, in which an inner surface of an inner tube has excellent wear resistance and high mechanical strength, and each layer in the inner tube constituting the nozzle is firmly stuck while in use. SOLUTION: The nozzle for injecting powdery material has a three-layer structure formed by laminating an inner layer made of baked ceramics, an intermediate layer made of a buffer material, and an outer layer made of stainless steel or a unidirectional shape memory alloy. A fitting pin comprising the same material as the outer layer is inserted and fixed in a fitting hole which penetrates the outer and intermediate layers and is bored in the inner layer but does not penetrate the inner surface of the inner layer. The depth of the fitting hole is 50% or larger of a sum of the total thickness of the outer, intermediate, and inner layers, and 80% or smaller of a sum of the total thickness of the outer, intermediate, and inner layers. COPYRIGHT: (C)2009,JPO&INPIT