Method for manufacturing low carbon ferrochrome with high chromi

Details Method for manufacturing low carbon ferrochrome with high chromi Method for manufacturing low carbon ferrochrome with high chromi

1989-10-30

1992-06-23

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

148208, 148513, 148668, 420 71, 420104, 75623, C21D 148

Patent

active

051239574

ABSTRACT:
A method for manufacturing a low carbon ferrochrome with a high chromium content of at least 70 weight % Cr comprising the steps of at least once nitriding and crushing a low carbon ferrochrome to form a crushed ferrochrome nitride and subjecting the crushed ferrochrome nitride to an acid treatment comprising introducing the crushed ferrochrome nitride into an acid solution and stirring the resultant mixture of the ferrochrome nitride and the acid solution, to remove iron. The acid treated ferrochrome nitride is denitrided by heating in a vacuum.

REFERENCES:
patent: 3384455 (1968-05-01), Fuchs
patent: 3525608 (1970-08-01), Bryk
patent: 4417927 (1983-11-01), Fullman

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