Glass manufacturing – Processes – Slag – utilization
Patent
1998-08-25
1999-10-12
Silverman, Stanley S.
Glass manufacturing
Processes
Slag, utilization
651348, 501155, C03B 518, C03B 1908, C03B 516
Patent
active
059649119
ABSTRACT:
A process for making an abrasive composition. In the first step of this process, from about 50 to about 85 weight percent electric arc furnace dust is mixed with at least about 10 weight percent of silica to prepare a thermally crystallizable mixture; the electric arc furnace dust has a particle size distribution such that at least about 70 weight percent of its particles are smaller than about 20 microns, and it contains from about 35 to about 65 weight percent of at least an iron material selected from iron, iron oxide, and mixtures thereof. Thereafter the mixture is melted by subjecting it to a temperature of from about 2,300 to about 2,900 degrees Fahrenheit to form a glass melt, the glass melt is quenched by reducing its temperature at least 1,000 degrees Fahrenheit in less than about 5 seconds to form a quenched glass, and the quenched glass is crushed by subjecting it to a pressure of at least 1.0 MegaPascal.
REFERENCES:
patent: 4840671 (1989-06-01), Lynn et al.
patent: 5273566 (1993-12-01), Balcar et al.
patent: 5589118 (1996-12-01), Ford, Jr. et al.
patent: 5830251 (1998-11-01), Simpson et al.
Balcar Gerald P.
Morano James
Greenwald Howard J.
Greenwald Howard J.
Ruller Jacqueline A.
Silverman Stanley S.
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