High strength rock wool and process for producing same

Details High strength rock wool and process for producing same High strength rock wool and process for producing same

1996-07-09

1998-05-12

Ryan, Patrick

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Staple length fiber

428364, 428375, 428379, 110224, 110229, D02G 300

Patent

active

057502552

ABSTRACT:
A high strength rock wool obtained by preliminarily calcining the starting material comprising industrial wastes such as shot and the like generated in the course of the production of a rock wool in a calcination temperature region of from 1,000.degree. to 1,250.degree. C. for a time of at least 1 minute but within 60 minutes in an oxidizing atmosphere, immediately crushing and pulverizing the resulting block-shaped calcined product, introducing the resulting particle-shaped calcined product into an electric furnace to melt the same and fiberizing the resulting melt by a spinner wheels and a process for producing the same. The said rock wool has a high strength appropriate to utilize in a thermal insulation material, a sound absorbing material and various reinforcing fibers.

REFERENCES:
patent: 2636723 (1953-04-01), Harter et al.
patent: 4353725 (1982-10-01), Hohman et al.

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