Rotary process for making mineral fiber insulation material

A method of manufacturing mineral fibers comprising:

• rotating an orificed spinner and supplying molten mineral material to the spinner to centrifuge steams of molten mineral material;
• directing a downward annular flow of attenuating gases to attenuate the streams of molten mineral material into mineral fibers;
• supplying a mixture of combustion air and combustion gas to an annular burner positioned around the spinner;
• directing hot gases from the annular burner 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;
• sensing the temperature of the combustion air with a temperature sensor prior to the introduction of the combustion air to the burner;
• and
• controlling the temperature of the combustion air in response to the sensed temperature to maintain the temperature of the combustion air at a specific temperature.

A method of manufacturing mineral fibers comprising:

• rotating an orificed spinner and supplying molten mineral material to the spinner to centrifuge steams of molten mineral material;
• directing a downward annular flow of attenuating gases to attenuate the streams molten mineral material into mineral fibers;
• directing heat and combustion gases toward the spinner and the streams of molten mineral material;
• supplying combustion gases to the burner;
• supplying air for combustion to the burner;
• and
• drying the combustion air prior to its introduction to the burner.