Treatment of indium dusts

Details Treatment of indium dusts Treatment of indium dusts

1990-09-05

1992-04-28

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75688, 75693, 75695, 75706, 75961, 423 87, C22B 1300

Patent

active

051084970

ABSTRACT:
Indium-containing feedstocks, such as flue dusts from a refining or smelting process, are treated to increase the concentration of indium and at the same time to reduce the concentrations of lead, copper, and arsenic. The flue dusts are treated in a sodium-doped lead bath at temperatures of 675.degree. to 800.degree. C. Soda ash in the amount of 15 to 35 weight percent is blended with the feed stock and added to the sodium-doped lead bullion. The sodium reacts with the dusts to form a liquid dross, which is removed, cooled, and crushed. The powdered dross is water leached to remove the sodium salts. The indium remains in the filler cake and can be processed by conventional methods for the recovery of indium. About 95% of the indium reports to the filter cake, while lead retention in the filter cake is only about 5-15% of the initial lead content in the dust. A majority of the zinc also reports to the filter cake. A majority of the lead, copper, and silver report to the bullion, and a majority of the arsenic reports to the filtrate. Sodium consumption is about one pound of sodium for each five to ten pounds of feedstock.

REFERENCES:
patent: 1827821 (1931-10-01), Kirsebom
patent: 2433770 (1947-12-01), Lebedeff
patent: 4244734 (1981-01-01), Reynolds et al.
patent: 4404026 (1983-09-01), Di Martini et al.

Affiliated with

Also associated with

Rating

Treatment of indium dusts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Treatment of indium dusts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Treatment of indium dusts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1245640