US 6,158,249 A · Apparatus for manufacturing mineral wool

Abstract

The only methods hitherto available for the production of mineral wool from materials such as basalt either utilize a stationary nozzle (blast drawing method) or external centrifuging whereby unsatisfactory yield and/or a not entirely satisfactory fiber quality, particularly with regard to a high content of unfiberized components, are achieved. By way of the invention, application of a fiberization method is suggested which, in spite of a high fluidity of the molten mineral material such as basalt, arrives at high quality fibers with a low bead proportion at good yield. This is made possible by selection of specific materials and their fiberization in specific conditions. Whereas fiberization of these fluid materials is carried out in external centrifuging at viscosities of a few tens of poises, fiberization by internal centrifuging at viscosities of more than 100 poises is required, according to the: invention, in order to achieve a mineral wool for insulation purposes with a low bead content.

Claims27

Dependent claims

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.

1 more element

Dependencies are inferred from the claim text.

Apparatus for manufacturing mineral wool

Life of this patent

Apparatus for manufacturing mineral wool

Life of this patent

Abstract

Claims27