Patent ID: 6158249
Filing Date: 2000-12-12
Classification: C03B,C03C,C22C

Abstract:
A device for fiberization by means of internal centrifuging comprising:(1) a spinner having a peripheral wall with a multiplicity of orifices for centrifuging a molten mineral material, at a temperature of less than 1,400.degree. C. and a viscosity in excess of 100 poises, to form filaments,(2) an annular external burner arranged concentrically to said spinner for producing a gas flow along the peripheral wall of said spinner to supplementally attenuate said filaments,(3) an annular burner arranged inside said spinner for ongoing operation during fiberization, said annular burner having diverging flames which are directed at the inner surface of the peripheral wall of said spinner, and(4) a skirt having a curved surface located at the upper end of the peripheral wall of said spinner, and one or more flame retention means, positioned at an inner surface of said skirt, for keeping the diverging flames of said annular burner in a vicinity of the inner surface of said peripheral wall of said spinner.