High emissivity coating composition and method of use
AssigneeEquity Enterprises
InventorsCressie E. Holcombe, Jr., Lloyd R. Chapman
Life of this patent
Estimating the term…
Abstract
A high emissivity coating composition for coating the interior of a furnace to direct thermal energy toward a load in the furnace wherein the furnace operates above 1100.degree. C. thereby increasing the thermal efficiency of the furnace. The high emissivity coating composition includes a high emissivity agent and a binder agent. The preferred high emissivity agent is cerium oxide which defines a high emissivity factor from approximately 1000.degree. C. to above 2000.degree. C. The binder suspension agent is formulated to define the consistency and drying characteristics of paint such that the coating can be applied in a manner similar to the manner in which paint is applied. Moreover, the binder/suspension agent withstands the final use temperature.
Claims16
A method for improving the thermal efficiency of a furnace, said method comprising:
- applying a high emissivity coating to selected surfaces in the furnace, said high emissivity coating defining a coating composition comprising a high emissivity agent and a binder agent, said high emissivity agent being a rare earth oxide, wherein said rare earth is selected from the group consisting of cerium and terbium;
- drying said high emissivity coating;
- and,
- heating said high emissivity coating to a temperature in the range of 1000.degree. C. to 2000.degree. C. thereby producing a final coating, said final coating defining a high emissivity agent content ranging from 5 to 99 weight percent, said final coating being bonded to said selected surfaces of said furnace, said final coating being stable at temperatures greater than about 1000.degree. C.
A method for improving the thermal efficiency of a furnace, said method comprising:
- applying a high emissivity coating to selected surfaces in the furnace, said high emissivity coating defining a coating composition being comprised of 5 to 75 weight percent of a high emissivity agent and 25 to 95 weight percent of a binder agent, said high emissivity agent being a rare earth oxide wherein said rare earth is selected from a group consisting of cerium and terbium;
- drying said high emissivity coating;
- and,
- heating said high emissivity coating to a temperature in the range of 1000.degree. C. to 2000.degree. C. thereby producing a final coating, said final coating defining a high emissivity agent content ranging from 5 to 99 weight percent, said final coating being bonded to said selected surfaces of said furnace, said coating being stable at temperatures up to about 2000.degree. C.
Dependencies are inferred from the claim text.