Method for leaching nickel-copper matte employing substantially

Details Method for leaching nickel-copper matte employing substantially Method for leaching nickel-copper matte employing substantially

1995-11-13

1997-05-13

Simmons, David A.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

423 27, 4231504, C22B 306

Patent

active

056288174

ABSTRACT:
The invention relates to a process for leaching nickel and copper from nickel-copper matte formed in pyrometallurgical nickel production by means of a multi-stage process. It is essential of the invention that the leaching of nickel takes place in at least two stages in conditions where free sulfuric acid is essentially absent, and that in these stages, the leaching of the nickel content of the matte is mainly carried out with copper as the oxidizer.

REFERENCES:
patent: 3218161 (1965-11-01), Kunda et al.
patent: 4093526 (1978-06-01), Blanco et al.
patent: 4571262 (1986-02-01), Kerfoot et al.
patent: 5344479 (1994-09-01), Kerfoot et al.

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