WET TYPE SPRAY REFRACTORY COATING COMPOSITION

摘要

A wet type spray refractory coating composition having high fluidity at the time of pressure-feed by a pump and excellent pressure feed efficiency, losing its fluidity immediately after spraying and capable of thick spray coating, and moreover, free from floating from a steel frame surface due to shrinkage and danger of the occurrence of cracks, having excellent refractory performance and yet not containing inorganic fibers. This composition comprises a slurry portion and an aqueous aluminum sulphate solution portion that are joined, mixed and sprayed by a spray nozzle, and the spray portion contains (A) at least 20 wt.% of gypsum on the basis of the total solid content, (B) 5 to 40 wt.% of slaked lime and/or quicklime and (C) organic fibers and/or light weight aggregate and water as the indispensable components, and the content of the refractory performance improving elements after drying is at least 20 wt.%.