Method of treating dusts containing oxides

Details Method of treating dusts containing oxides Method of treating dusts containing oxides

1996-05-30

1999-02-16

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75324, 75661, 75694, 75695, 75962, C22B 1904, C22B 1300

Patent

active

058715614

ABSTRACT:
Dusts containing zinc and/or lead in the form of oxides and one or more reducing agents are mixed with each other before or after being introduced into a heat treatment furnace. The mixture is heated to a given temperature range under a substantial vacuum so that the zinc and/or lead in the form of oxides are reduced to zinc and/or lead in the state of pure metals and evaporated in the furnace. The evaporated zinc and/or lead are introduced into a retrieving container also under a substantial vacuum and at a given temperature where the evaporated zinc and/or lead pure metals are condensed and retrieved.

REFERENCES:
patent: 2127632 (1938-08-01), Najarian
patent: 2920951 (1960-01-01), Bretschneider et al.
patent: 4227922 (1980-10-01), Laws et al.
patent: 5350438 (1994-09-01), Okada et al.

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