Coating processes – Spraying – Ingredients supplied separately
Patent
1983-03-29
1984-07-24
Beck, Shrive P.
Coating processes
Spraying
Ingredients supplied separately
427421, 427427, B05D 102
Patent
active
044617895
ABSTRACT:
A method of gunning a basic gunning refractory onto a hot or cold surface to provide a gunned coating or filling, by a nozzle mixing method, the gunning refractory containing a basic refractory as aggregate, not more than 5% by weight of at least one of organic fibrous materials and inorganic fibrous materials, and as a binder, at least one of phosphates and silicates, characterized in that the gunning refractory is fed to the nozzle under air pressure in the range of 1-10 Kg/cm.sup.2, the gunning refractory is then discharged while being mixed at the nozzle with 5-25% by weight of water under pressure in the range of 0.5-5 Kg/cm.sup.2 and while a rotary motion is imparted thereto, the gunning is commenced by first discharging air and water simultaneously and then the gunning refractory, and the distance between the nozzle discharge end and the surface is in the range of 0.15 to 1.00 m while the spray width is less than 1.00 m.
REFERENCES:
patent: 2495540 (1950-01-01), Nichols et al.
patent: 3797745 (1974-03-01), Haus
patent: 4239397 (1980-12-01), Sandell et al.
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