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US 5,512,325 AGranted
Non-slumping, pumpable castable and method of applying the same
AssigneeIndresco Inc.
InventorsMark C. Langenohl, Gustav O. Hughes
Life of this patent
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AssigneeIndresco Inc.
InventorsMark C. Langenohl, Gustav O. Hughes
Estimating the term…
An essentially non-slumping, high density, low moisture and low cement castable composition, consisting of a tempered, pumpable first component containing the castable solids and consisting essentially of a refractory aggregate, a calcium-aluminate cement, a flow aid, a deflocculating agent, and water, the water being present in the lowest amount sufficient to achieve a pumpable consistency of the tempered first component, and a flocculating agent as a second component to be added to said first component at time of installation in an amount sufficient to give the castable a dried bulk density of at least about 120 pcf. The invention also includes the method of applying such castable through a spray nozzle in which the flocculating agent is added to the tempered first component just prior to its application through a spray nozzle.
A method of applying a low moisture, low cement refractory castable to a refractory vessel with a swing valve pump and associated spray nozzle, without the use of forms comprising preparing a tempered pumpable first component consisting essentially of a refractory aggregate, a calcium-aluminate cement, a solid flow aid, and a deflocculating agent and water in the lowest amounts sufficient to achieve a consistency sufficient to enable the composition to be pumped and applied through said swing valve pump and spray nozzle, adding a flocculating agent to said composition just prior to its application through said spray nozzle in an amount sufficient to give the castable a dried bulk density of at least about 120 pcf, and then applying the composition to the refractory vessel without the use of forms.
Dependencies are inferred from the claim text.