Method of refining mattes containing nickel

Details Method of refining mattes containing nickel Method of refining mattes containing nickel

1976-05-03

1977-08-30

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C22B 2300

Patent

active

040452158

ABSTRACT:
Nickel-containing mattes are desulphurized down to low sulphur levels (less than 1%) in a multi-stage process effected in a single converter vessel. In the first stage, an oxidizing gas is blown into the molten matte to reduce the sulphur level to about 4 to 7% and in one or more subsequent stages, oxygen and a diluent are blown into the matte, with a peripheral flow of protective fluid to protect the tuyeres against wear. The diluent, which may be argon or steam for example, dilutes the sulphur dioxide in the matte.

REFERENCES:
patent: 1623797 (1927-04-01), Lellep
patent: 1680155 (1928-08-01), Lellep
patent: 1828752 (1931-10-01), Shoffstall
patent: 3069254 (1962-12-01), Queneau et al.
patent: 3706549 (1972-12-01), Knuppel et al.

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