Production of ferroboron by the silicon reduction of boric acid

Details Production of ferroboron by the silicon reduction of boric acid Production of ferroboron by the silicon reduction of boric acid

1985-09-12

1986-07-29

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75129, 751335, C22C 3300

Patent

active

046029508

ABSTRACT:
This is a process for producing a ferroboron containing 0.5-20% silicon and up to 4.5% carbon. This process utilizes the silicon reduction of B.sub.2 O.sub.3 and avoids excessive losses due to volatilization of B.sub.2 O.sub.3. It also results in a ferroboron which is substantially free from aluminum impurity. The process uses a mixture, which includes an iron-containing constituent, a silicon containing constituent, and boric acid. Preferably a molten pool is prepared and controlled to a temperature of 1100-1550 (and preferably 1100.degree.-1450.degree. C.) prior to the addition of the boric acid. At least some of the silicon constituent can also be injected into the molten pool along with the boric acid.

REFERENCES:
patent: 4297135 (1981-10-01), Giessen
patent: 4397691 (1983-08-01), Hamada
patent: 4440568 (1984-04-01), Staggers
patent: 4486226 (1984-12-01), Hildebrand
patent: 4509976 (1985-04-01), Zambrano
patent: 4536215 (1985-08-01), Coad

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