| 摘要 |
PURPOSE:To repair the eroded part on the inside wall of a converter or the like by refractories with high heat efficiency in the stage of repairing said part, by melt spraying of the refractories of high m.p. by mixing slag of a low m.p., etc. melted as a binder with the refractories. CONSTITUTION:If the refractories 2 on the inside surface of a converter or other refining furnace or the like are partially damaged 11, the damaged part 11 is repaired by melt spraying of refractories. A combustion chamber 3 is provided on the top end 1 of a burner for melt spraying and a flame injection port 4 is formed on the front surface. The 1st supply hole 5 for gas-solid flow is penetrated from the central part in the rear of the burner up to the chamber 3, and the powder of a relatively low m.p. such as converter slag or the like is ejected by gaseous fuel of C3H8, etc. Gaseous oxygen is ejected from the gas supply port 6 around the same and a high temp. is generated by the combustion of C3H8 by O2 in the chamber 3 to melt and overheat the slag powder. At the same time, powder of high m.p. refractories of magnesia or the like is blown through a supply port 7 and the molten and overheated slag is melt-sprayed as a binder to the damaged part 11, whereby said part is repaired. |
