Purification of particulate glass by mag separation of impuritie

Details Purification of particulate glass by mag separation of impuritie Purification of particulate glass by mag separation of impuritie

1977-08-31

1980-08-19

Halper, Robert

Classifying, separating, and assorting solids

Magnetic

Paramagnetic

209 3, 209223R, B03C 126

Patent

active

042183103

ABSTRACT:
The present invention relates to the purification of glass, obtained by froth flotation from shredded municipal trash; more particularly, the present invention relates to a process for removing aluminum oxide, especially corundum, and silicon carbide particles or stones, of a size greater than 60 mesh, as impurities from the glass. The process comprises subjecting the froth-floated glass to magnetic separation, especially high intensity magnetic separation, such as that produced by employing a high intensity induced roll magnetic separator. Since such impurities function unexpectedly as magnetics in relation to glass, the refractory impurities are removed from the glass during such magnetic separation. The resulting purified glass can then be employed as glass cullet for production of finished glass articles.

REFERENCES:
patent: 805854 (1905-11-01), Medburg
patent: 994871 (1911-06-01), Payne
patent: 1071838 (1913-09-01), Weatherby
patent: 1999825 (1935-04-01), Saklytwalla
patent: 2065460 (1936-12-01), Johnson
patent: 2094440 (1937-09-01), Weis
patent: 2975897 (1961-03-01), Presgrave
patent: 3045821 (1962-07-01), Cavanagh
patent: 3289836 (1966-12-01), Weston
patent: 3877578 (1975-04-01), Morey
E and MJ, 165, No. 7, Neumann, Jul. 1964-pp. 88-91.

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