| 摘要 |
PROBLEM TO BE SOLVED: To make the labor savable in spraying execution, reduce the scattering of dust, reduce the porosity of an executed material and provide the executed material excellent in refractory characteristics by adding water to a powder composition containing a refractory aggregate, a refractory powder and a small amount of a dispersing agent, kneading the resultant mixture and mixing a quick setting agent in the prepared body having self-fluidity. SOLUTION: This body for spraying is obtained by compounding a refractory aggregate, a refractory powder having <=30 μm average particle diameter and a dispersing agent in an amount of 0.02-1 pt.wt. based on 100 pts.wt. of the total amount of both the components, providing a powder composition, adding 4-15 pts.wt. of water to 100 pts.wt. of the resultant powder composition, kneading both and affording the body. The resultant body has >=180 mm self-fluidity indicated by a spread diameter obtained when injecting the body just after the kneading into a truncated conical cone mold having 50 mm top inside diameter, 100 mm lower end inside diameter, 150 mm height and the opened top and lower end, filling the body therein, pulling out the cone mold to the upper side and allowing the body to stand for 60 s. A quick setting agent in an amount of 0.05-3 pts.wt. based on 100 pts.wt. of the powder composition is injected and mixed with the body in an injection port for compressed air for spraying or the downstream side of the injection port to carry out spraying execution. |
