Abstract: A method of manufacturing mineral fibers includes rotating an orificed spinner and supplying molten mineral material to the spinner to centrifuge steams of molten mineral material. A downward annular flow of attenuating gases is directed to attenuate the streams of molten mineral material into mineral fibers. A mixture of combustion air and combustion gas is supplied to an annular burner positioned around the spinner. Heat from the annular burner is directed toward the spinner and the streams of molten mineral material to heat the spinner and assist in attenuating the streams of molten mineral material into mineral fibers. A pressure sensor senses the pressure of the combustion air prior to the introduction of the combustion air to the burner. The pressure of the combustion air is controlled in response to the sensed pressure to maintain the pressure of the combustion air at a specific pressure.

Abstract: An apparatus for manufacturing low diameter, high quality glass wool fibers, and more particularly to a spinner for centrifuging low diameter glass wool fibers to improve light-density building insulation is disclosed. The spinner includes a number of glass orifices positioned predetermined column angle and provides a hole pattern that improves the quality of the glass. The improved hole pattern is determined by experimentation and may be implemented in any glass fiberization process.