Process of making silicon, iron and ferroalloys

Details Process of making silicon, iron and ferroalloys Process of making silicon, iron and ferroalloys

1985-12-11

1986-09-23

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 3, 75 1063, C22B 400

Patent

active

046133631

ABSTRACT:
The present invention relates to the use of self-reducing compacts as a feed material for a submerged electric arc furnace. The compacts are comprised of finely-divided carbon-reducible oxide materials, such as, the oxides of silicon, iron, manganese, chromium or nickel, or mixtures thereof, and a carbonaceous source material. The compacts may also contain a slag-forming additive. The particle size of the components is less than about 0.2 mm. The particles are mixed in appropriate weight ratios to yield the desired product, for example, silicon, iron, or iron alloy. Water is incorporated into the mixture by alternately stirring and pressing to produce densified agglomerates. Sufficient water is added that the subsequent compaction step squeezes out at least about 1% of the incorporated water. The agglomerates are compacted, suitably by means of a double rolls, which exert a maximum momentary pressure of from about 300 to about 4000 kg per linear cm of roll width, to form a compacted product. The resultant compacted product is eminently suited to use as a feed material for a submerged arc furnace.

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patent: 3215522 (1965-11-01), Kuhlmann
patent: 3224871 (1965-12-01), Collin
patent: 3276859 (1966-10-01), Collin

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