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    • 61. 发明专利
    • FLAME SPRAYING OF POWDERY REFRACTORY BODY
    • JPS56118763A
    • 1981-09-17
    • JP1971880
    • 1980-02-21
    • NIPPON STEEL CORP
    • FUKUOKA HIROMIMATSUO MASATAKAHAMAI KAZUO
    • B05B7/20B05D1/10
    • PURPOSE:To prevent cracks of a flame spraying layer and to enhance capability thereof remarkably by a method wherein the powdery refractory body is passed through a gas flame while a rough grained refractory body is injected from a center nozzle of a powder flame spraying device and a fine powder refractory body is injected from nozzles around said center nozzle to carry out the flame spraying. CONSTITUTION:The powder flame spraying device is equipped with an outer cylinder 1 including a flame spraying nozzle main body comprising spraying nozzle constituting bodies 2, 3 and a cooling water supplied at a cooling water inlet of a burner main body and the outer cylinder 1 is passed through a water passage 6 around the burner main body and discharged from a cooling water outlet 7. Further, a gaseous fuel from a supply pipe 9 and O2 from a supply pipe 10 are mixed at a mixing point 11 and injected from a flame port 8. The fine powder refractory body conveyed by a gas is injected from a fine powder injecting port 13 through a pipe 12. A pipe 1 is a pipe for conveying the rough grained refractory body and said rough grained refractory body conveyed by said pipe is injected to an objective article from an injection port 15.