| 摘要 |
A method for placing a thixotropic low-cement castable refractory material without the necessity for forms. A low-cement castable material is mixed wit h a measured amount of water, then is pumped hydraulically through a hose (13) to a nozzle assembly (14). Compressed air and a cement setting agent are add ed to the mixture at the nozzle (14). The addition of the setting agent at the nozzle (14) overcomes the thixotropic nature of the low-cement castable, so that it will immediately "set" in position when sprayed onto a surface, including vertical and overhead surfaces.
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