发明名称 |
METHOD FOR SPRAYING CONCRETE BY DRY PROCESS, CORRESPONDING SPRAY NOZZLE AND WETTING RING |
摘要 |
The invention concerns a method and a nozzle for dry process spraying of refractory concrete. Said method is characterised in that it consists in mixing water with a dry product comprising in particular added ultrafine particles, a dispersing agent and a set accelerator, before spraying. The mixture is formed with a volume percentage of water less than 25 %. The nozzle (1) comprises a hose (3) transporting pressurised water and pneumatic hoses (2, 5) transporting the dry product and the moistened product, and a water box (4), comprising a wetting ring (12). The latter comprises four to eight orifices circulating (21-24) water, substantially perpendicular to the axis of flow (10) of the product and having each a diameter ranging between 0.8 and 1.2 mm. The nozzle further comprises means for pressurising water by at least 8 bars. Thus, the wetting ring (12) ensures the moistening of the product with water at said high pressure. |
申请公布号 |
WO0117924(A1) |
申请公布日期 |
2001.03.15 |
申请号 |
WO2000FR02442 |
申请日期 |
2000.09.05 |
申请人 |
LAFARGE REFRACTORIES;MEUNIER, PIERRE;LEFEVRE, CLAUDE;LEE, JOHNSON |
发明人 |
MEUNIER, PIERRE;LEFEVRE, CLAUDE;LEE, JOHNSON |
分类号 |
B05B7/14;B05B11/00;B28B1/32;B28C5/02;C04B22/00;C04B28/00;C04B28/06;C04B28/30;C04B35/66;E04F21/12 |
主分类号 |
B05B7/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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