| abstract |
An object of the present invention is to improve the conveyability of a quick-setting agent added to a refractory composition by air-jet conveyance, and to improve the miscibility of a quick-setting agent and a refractory composition. The means for solving the problem is a powder quick-setting agent which is used for the refractory injection molding, and when the refractory composition is conveyed to the nozzle (13) through the pipe (17), the nozzle (13) Or a powder quick-setting agent added to the refractory composition by a gas stream in front of the nozzle, characterized by comprising: a first powder material that cures the refractory composition; and a second powder material that is a refractory material Further, the second powder material contains 30% by mass of particles having a particle diameter of more than 0.5 mm and 5 mass% of particles and a particle diameter of 0.1 mm or more. |