Glass manufacturing – Processes – Fining or homogenizing molten glass
Patent
1990-08-17
1991-11-26
Lindsay, Robert L.
Glass manufacturing
Processes
Fining or homogenizing molten glass
65 325, 65136, 422168, 501155, C03B 508
Patent
active
050679783
ABSTRACT:
A process for the removal of lead from a waste product comprising the steps of delivering silica to a combustion chamber, heating the silica within the combustion chamber to a temperature of greater than 1500.degree. F., mixing a lead-containing waste with the heated silica so as to form a leaded glass, and removing the leaded glass from the combustion chamber. The silica material is sand. The process further includes the step of removing oxygen from the chamber prior to the step of heating. The oxygen is removed by injecting an inert gas into the chamber so as to displace oxygen from the chamber. The silica is heated to a temperature suitable for forming molten glass. The remaining constituents of the waste product are heated so as to become diassociated gaseous components.
REFERENCES:
patent: 4149866 (1979-04-01), Austin et al.
patent: 4666490 (1987-05-01), Drake
patent: 4678493 (1987-07-01), Roberts
patent: 4820325 (1989-04-01), Wheeler
patent: 4944785 (1990-07-01), Sorg et al.
patent: 4988376 (1991-01-01), Mason et al.
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