Process for guniting refractory mixes using conventional dry gunning equipment and refractory mixes for use in same
US8784943B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2010 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Oct 23, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D1/1642
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.