Specialized metallurgical processes – compositions for use therei – Processes
Patent
1990-02-08
1991-04-16
Dean, R.
Specialized metallurgical processes, compositions for use therei
Processes
75507, 75528, 75539, 75558, 75560, 75568, 75570, C21C 702, C21C 704
Patent
active
050079581
ABSTRACT:
A lime-based injection powder for use in steel-refining, having excellent waterproofing and desulphurization effects, consists of (a) more than 65% by weight of calcium oxide, (b) less than 30% by weight of fluorite, and 5-10% by weight of Al powder, 5%-7% by weight of the calcium oxide being converted into CaCO3 by reacting the calcium oxide with carbon dioxide in a multi-stage fluidized bed reactor.
REFERENCES:
patent: 4154606 (1979-05-01), Freissmuth et al.
D. R. Glasson, "Reactivity of Lime and Related Oxides, IV, Carbonatation of Lime", J. Appl. Chem., 10, Jan. 1960, pp. 42-48.
Cheng Der-Shyang
Chung Yeong-Huei
China Steel Corporation
Dean R.
Koehler Robert R.
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