Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1977-09-26
1978-08-29
Dean, R.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75101R, 423DIG12, 423 41, 423 45, 423 49, 423 62, 423 68, 423146, 423150, C22B 106
Patent
active
041101065
ABSTRACT:
Process for quantitatively converting non-ferrous metals chosen from the group consisting of copper, nickel, cobalt, vanadium, and manganese in an ore concentrate to soluble sulfates and simultaneously convert the ferrous values in the ore to insoluble oxides. The process comprises roasting finely divided ore particles at a temperature in excess of 650.degree. C. in the presence of a roaster gas comprising at least a stoichiometric amount of oxygen and at least 1% SO.sub.2. The roasting is performed in the presence of a sufficient amount of a mixture of salts to allow the formation of a liquid coating on the ore particles. In a preferred embodiment, the mixed salt which forms the liquid coating comprises Na.sub.2 SO.sub.4 and K.sub.2 SO.sub.4 with the ratio of sodium to potassium being between 1.0 and 2.0.
REFERENCES:
patent: 1364804 (1921-01-01), Ramkin
patent: 2719082 (1955-09-01), Sproule et al.
patent: 2813016 (1957-11-01), Thornhill
patent: 2930687 (1960-03-01), Thornhill et al.
patent: 3232750 (1966-02-01), Kazimietz
patent: 3367740 (1968-02-01), Zrbryckyj et al.
patent: 3451804 (1969-06-01), Malmstrom et al.
patent: 3880650 (1975-04-01), Pemsler
Delarue, G.; Chime Analytique, vol, 44, No. 3, 3/62, pp. 91-102.
Flood, H.; "The Acidic and Basic Properties of Oxides", Acta Chemica, Scandinavica, vol. 1, (1947), pp. 781-789.
Zubryckyj, N., et al.; "Preferential Sulfation of Nickel and Cobalt in Lateritic Ores", Journals of Metals; (5/65) pp. 478-486.
Weast, R. C. ed., Handbook of Chemistry and Physics 52nd ed.; The Chemical Rubber Co., Cleveland, Ohio. p. B62,140 (1971).
Hodgman C. D. ed., Handbook of Chemistry and Physics 43rd ed.; The Chemical Rubber Co. pp. 519, 604, 605 (1961).
Dean R.
Kennecott Copper Corporation
Lewis Michael L.
Lorusso Anthony M.
Sniado John L.
LandOfFree
Selective sulfation process for partitioning ferrous and non-fer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Selective sulfation process for partitioning ferrous and non-fer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective sulfation process for partitioning ferrous and non-fer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1630919