Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1979-07-30
1981-01-27
Hearn, Brian E.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 68R, 423132, C22B 2100
Patent
active
042473250
ABSTRACT:
A technique for controlling severe chemical reactions which occur when salt containing furnace slags from secondary aluminum melting operations are brought in contact with water is provided. The technique which retards the formation and evolution of hydrogen gas resulting from the reaction of aluminum metal fines with water in the presence of chloride and the formation and evoluation of ammonia gas from the reaction of aluminum nitride with water is accomplished by controlling the pH of the water-solid slurry to be around 8. Consequently, the formation and gaseous evolution of hydrogen is controlled and the evolution of ammonia is eliminated with a concomitant elimination of explosion and fire hazards associated with the uncontrolled chemical reactions.
REFERENCES:
patent: 1262063 (1918-04-01), Lawrie
patent: 1517689 (1924-12-01), Welch
patent: 3660076 (1972-05-01), Williams
patent: 3955969 (1976-05-01), Johnson
patent: 4073644 (1978-02-01), Papafingos
Garst et al., "The Recovery of Metal and Other Valuable Products from Aluminum Dross", U.S. Bureau of Mines, R.I. 3874 (5/1946), pp. 2, 8-12.
Bauer Carl F.
Beese Ronald E.
Parikh Niranjan M.
American Can Company
Auber Robert P.
Bowie Stuart S.
Hearn Brian E.
Passman Aaron
LandOfFree
pH Control during leaching of aluminum slags does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with pH Control during leaching of aluminum slags, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and pH Control during leaching of aluminum slags will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1179933