Process for guniting refractory mixes using conventional dry gunning equipment and refractory mixes for use in same
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United States of America Patent
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Jul 22, 2014
Grant Date -
Sep 15, 2011
app pub date -
Mar 11, 2010
filing date -
Mar 11, 2009
priority date (Note) -
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Abstract
A dry refractory mix and a method for apply the dry refractory mix to a surface. One aspect of the invention utilizes gunning mixes without cement. The dry refractory mix also may include a setting agent that is homogeneously blended with the refractory mix. In operation, when used with pneumatic systems, dry refractory material is fed into a hopper of a gunnite machine, introduced into an air flow, and conveyed by air through one or more hoses to a nozzle. A liquid binder is introduced into the air flow for mixing with the suspended dry refractory material at or before the nozzle. A fitting, such as a water ring with holes, may be used for injecting the binder into the air flow containing the dry refractory material. The mixed refractory/binder material is discharged through the nozzle for application to a surface.
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