Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1978-09-20
1980-04-29
Rosenberg, P. D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 60, 75 82, 75129, C21C 534
Patent
active
042004535
ABSTRACT:
The process for production of a nickel alloy having a maximum sulphur content of 0.05% in a converter by treatment of a crude ferro-nickel melt having a sulphur content of about 0.10% to 0.50% with oxygen and lime to form a slag and removal of the slag is improved by introducing at least a part of the required amount of lime as lime powder, together with oxygen, by injection tuyeres under the surface of the melt using tuyeres consisting of concentric pipes wherein the oxygen is surrounded by hydrocarbons. This improvement reduces to a maximum of two, the slag changes required to reduce the sulfur content to 0.05% or lower.
REFERENCES:
patent: 3771998 (1973-11-01), Knuppel
patent: 3909245 (1975-09-01), Brotzmann
Hatzinicolaides John A.
Papamantellos Demetrios C.
Eisenwerk-Gesellschaft Maximilianshutte m.b.H.
Larco Societe Miniere et Metallurgique de Larymna S.A.
Rosenberg P. D.
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