Apparatus for the heat processing of particulate materials
Patent 4475936 Issued on October 9, 1984. Estimated Expiration Date: 
February 10, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 10, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2838881 2978339 3133805 3138444 3151965 3230064 Method for making glass beads Patent #: 4385917 InventorsAssigneeApplicationNo. 06/465611 filed on 02/10/1983US Classes:65/142, PARTICULATE BEAD OR BALL MAKING APPARATUS (E.G., PIN HEADING)65/21.3Spheroidizing or rounding of solid glass particlesExaminersPrimary: Lindsay, Robert L.Attorney, Agent or FirmInternational ClassesC03B 19/00 (20060101)C03B 19/10 (20060101) Foreign Application Priority Data1982-02-12 GBAbstractA vortex combustion furnace (1) for the production of glass beads or the like is generally cylindrical and has an outlet flue (24) at its upper end. A burner (13) at the lower end burns a gas/air mixture. Secondary air is introduced into the chamber through tangential air inlets (16) and creates a vortex (71) within the chamber. Tertiary air is introduced through a ring of angled nozzles (71) surrounding the burner further to swirl the flame. The vortex has a top-hat temperature profile with a central heating region with a temperature in excess of 1000° C. and a surrounding cooling region with a temperature not much above ambient. Glass cullet is supplied to a fluidized bed (53) and then entrained in a pipe (44) to be injected into the chamber. The cullet follows a spiral path in the vortex, is heated, melts to form glass beads, is then cooled and finally is collected after striking the wall of the chamber. | |
