To improve a bonding rate and a bonding strength of a spraying material in a method for executing spraying for adding an accelerator in a nozzle.

The spraying material containing a refractory raw material containing a phosphate on surfaces of particles as an aggregate is previously added with executing water content, then added with an accelerator in a nozzle 1, and sprayed, thereby improving a bonding rate and bonding strength of the spraying material. And, in the case of using a sodium silicate as the accelerator, or in the case that the spraying material contains mineral short fibers, the bonding rate and the bonding strength of the spraying material are further improved.