Method for producing high-purity metallic chromium

Details Method for producing high-purity metallic chromium Method for producing high-purity metallic chromium

1992-08-03

1995-02-21

Walsh, Donald P.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C22B 3432

Patent

active

053912152

ABSTRACT:
There is proposed a novel method for manufacturing high-purity metallic chromium that can eliminate the problems of reduced heating capability of the furnace, contamination of produced metallic chromium and other disadvantages related to the operation of the furnace. According to the invention, one or more than one of easily sulfidable metals selected from Sn, Ni and Cu are added to crude metallic chromium containing impurities and the mixture is loaded into a vacuum furnace equipped with heating elements of graphite and heated to 1,200.degree. to 1,500.degree. C. in an atmosphere with reduced pressure of between 0.1 and 5 torr.

REFERENCES:
patent: 2834671 (1958-05-01), Nachtman et al.
patent: 2850378 (1958-09-01), Cooper
patent: 2939784 (1960-06-01), Brennan et al.
patent: 3502461 (1970-03-01), Guttler et al.
patent: 3794482 (1974-02-01), Anderson et al.
patent: 3945863 (1976-03-01), Precht
patent: 4662939 (1987-05-01), Reinshagen
patent: 4722826 (1988-02-01), Poole
patent: 5092921 (1992-05-01), Kobayashi et al.

Affiliated with

Also associated with

Rating

Method for producing high-purity metallic chromium does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for producing high-purity metallic chromium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing high-purity metallic chromium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1927504