Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1983-06-10
1985-05-21
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 65EB, C22B 400
Patent
active
045184186
ABSTRACT:
It has been discovered that suprisingly effective removal of impurities from copper can be achieved using electron beam distillation, especially with respect to relatively low amounts of impurities such as Ag, Se, Te, S, Bi and Pb. Certain pretreatments of unrefined metal prior to electron beam irradiation significantly improve overall results. These include iron and/or oxygen removal treatments. In a particularly advantageous embodiment, these impurity removal treatments and combinations thereof are achieved in conjunction with a new method of electron beam distillation of metals which involves a horizontal multistage system with recycle of the condensed vapor phases.
REFERENCES:
patent: 1840946 (1932-01-01), Hall
patent: 2174559 (1939-10-01), Anderson et al.
patent: 2698297 (1954-12-01), Bowden et al.
patent: 2823111 (1958-02-01), Davey et al.
patent: 2939783 (1960-06-01), Lundevall
patent: 3005859 (1961-10-01), Candidus
patent: 3151042 (1964-09-01), Koshoot
patent: 3183077 (1965-05-01), Kraus
patent: 3210454 (1965-10-01), Morley
patent: 3219435 (1965-11-01), Grueber et al.
patent: 3234606 (1966-02-01), Smith, Jr.
patent: 3235647 (1966-02-01), Hanks
patent: 3288594 (1966-11-01), Smith, Jr.
patent: 3342250 (1967-09-01), Trepschuh et al.
patent: 3343828 (1967-09-01), Hunt
patent: 3409729 (1968-11-01), Hanks et al.
patent: 3450824 (1969-06-01), Hanks et al.
patent: 3484233 (1969-12-01), Bonilla
patent: 3494804 (1970-02-01), Hanks et al.
patent: 3496159 (1970-02-01), Spence
patent: 3607222 (1971-09-01), Kennedy
patent: 3632334 (1972-01-01), Quintin
patent: 3778044 (1973-12-01), Brown et al.
patent: 3785944 (1974-01-01), Atwood et al.
patent: 3879272 (1975-04-01), Atwood et al.
patent: 3948495 (1976-04-01), Semenovich et al.
patent: 4035574 (1977-07-01), Kennedy
patent: 4043802 (1977-08-01), Esdaile et al.
patent: 4190404 (1980-02-01), Drs
patent: 4265644 (1981-05-01), Gammon
L. K. Bigelow and I. S. Servi, "Quality of Cathode Copper", AIME Annual Meeting, New York, Feb. 19, 1975.
Gilchrist, Extraction Metallurgy, 2nd Edition, Pergamon Press (1980), p. 132.
Olette, "Vacuum Distillation of Minor Elements from Liquid Ferrous Alloys", Physical Chemistry of Process Metallurgy, part 2', G. R. St. Pierre, Ed., Interscience, New York (1961), pp. 1065-1087.
Santala et al., The Journal of Vacuum Science and Technology, vol. 7, No. 6, (1970), p. 22.
Hunt et al., "Metal Refining in High Vacuum by Distillation of Electron Beam Hearths", Southwest Minerals Conference, San Francisco, Mar. 25-28, 1979, Abstract.
Hunt et al., "Proposed Program for Sales of a Copper-Silver Separation Process Based upon Volativity Differences", Southwest Mineral Conference, San Francisco, Mar. 25-28, 1979, Handout.
Schiller et al., "Deposition by Electron Beam Evaporation with Rates of up to 50 .mu.m/s", 3rd Conference on Metallurgical Coatings, Apr. 3-7, 1978, San Francisco, Calif.
Schiller et al., Thin Solid Films, vol. 54 (1978) 1.S, pp. 9-21.
Fletcher Archibald W.
Hunt Charles D'A.
Duval Corporation
Rosenberg Peter D.
LandOfFree
Electron beam refinement of metals, particularly copper does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electron beam refinement of metals, particularly copper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron beam refinement of metals, particularly copper will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1536416