Process of making silicon, iron and ferroalloys

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

C - Chemistry, Metallurgy

01

B

53/1, 23/325

C01B 33/02 (2006.01) C01B 33/025 (2006.01) C22B 1/16 (2006.01) C22B 5/10 (2006.01) C22C 33/00 (2006.01)

Patent

CA 1252634

PROCESS OF MAKING SILICON, IRON AND FERROALLOYS 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 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. 1A

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