| 摘要 |
PROBLEM TO BE SOLVED: To enable a dense characteristic of a refractory repairing layer to be improved while a nozzle clogged state is being prevented by a method wherein a particle diameter of an easily oxidized metallic particle is set to be not less than a value expressed in a specified equation. SOLUTION: Ignitable gas 3, refractory particles 4 and metallic particles 5 are injected from a burner tile 1 in a forward direction through a flow passage 2 outside the center of a nozzle main body 9. Combustion assisting gas 6 is sent through a flow passage 8, struck against a nozzle cap 7, its advancing direction is bent in a radial direction and the gas is mixed with ignitable gas 3, refractory particles 4 and metallic particles 5. In this case, when mixed refractory material containing metallic particles 5 is mixed with combustion assisting gas 6 together with the ignitable gas 3, it is assumed that a distance L from a point where an axial line of the flow passage having mixed refractory materials 4, 5 flowed into a mixing region is crossed with an axial line of a low passage having the combustion assisting gas 6 flowed into this region to a flame generating point is defined as a distance L and particle diameter D1 of the metallic particle 5 has the relation expressed by D1 >=kI×L, where the coefficient ki is a coefficient defined in response to the substance of the metallic particles 5.
|
