Apparatus for Producing Spherical Particles

Author:  T.K. Wood; A.R. Margreither, both of NJ
Source:  US Patent 4,046,548
Doc ID:  1977069
Year of Publication:  1977
Abstract:  
ABSTRACT A system for producing glass spheres in which the combustion air introduced into the furnace iw preheated. The furnace has a shroud enclosing at least a portion of its outer surface, and ambient air is introduced to the space between the outer surface and the shroud by means of a fan generating a slight positive pressure. Preheated air is removed from the shroud by a plurality of ducts leading to the source of heat.