Apparatus and method for making mineral wool from coal-ash

Details Apparatus and method for making mineral wool from coal-ash Apparatus and method for making mineral wool from coal-ash

1990-01-05

1990-11-13

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 15, 65 28, 65 992, 65134, 65136, 65DIG4, 65347, 373 27, C03B 3704

Patent

active

049699407

ABSTRACT:
An apparatus and method which provides for controlled melting of both components of coal-ash, as well as the melting of selected additives, the melted coal-ash with additive being immediately available to a conventional fiberizing spinner stage. An arc furnace provides a shallow vat for molten pig iron. A first chute allows for introduction of coal-ash into the vat, and a second chute allows for the introduction of selected additives into the vat. The molten pig iron quickly melts any coal-ash and additive entering the vat, and the molten coal-ash/additive thereupon spreads out across the surface of the molten pig iron (the molten pig iron having a much higher specific gravity). In order to ensure that the molten coal-ash/additive has a predetermined fluidity at an adjacent spinner stage, the furnace is provided with a specially structured spout located above the spinner stage. The spout provides a weir to skim melted coal-ash and additive, a dam to block unmelted coal-ash/additive, and a heat reservoir for heating the melted coal-ash/additive.

REFERENCES:
patent: 2300930 (1942-11-01), Johnson
patent: 3499743 (1970-03-01), Fanica et al.
patent: 3626072 (1971-12-01), Haralampiev et al.
patent: 4079185 (1978-03-01), Collin
patent: 4098603 (1978-07-01), Roth et al.
patent: 4650510 (1987-03-01), Tuovinen
Power: "Convert Ash to Insulation?", Mar. 1978, p. 141.
Detroit Edison Co. Internal Memo dated 9/11/80, 8 pages, Title: "Mineral Wool Spun Fibers from Coal Ash".

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