Process for combined production of ferrosilicozirconium and zirc

Details Process for combined production of ferrosilicozirconium and zirc Process for combined production of ferrosilicozirconium and zirc

1979-05-30

1980-10-21

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 10R, 75134R, 75134F, 75135, C22B 500, C22C 2800

Patent

active

042292140

ABSTRACT:
A process for a combined production of ferrosilicozirconium and zirconium corundum comprising melting of a zirconic concentrate, an iron ore and aluminium taken in a weight ratio therebetween of 51-69:9.9-16.5:19.8-34.8 respectively at a temperature of 1,950.degree. to 2,000.degree. C. and separately casting the resulting desired products; prior to casting zirconium corundum, alumina is added thereto in an amount ranging from 0.5 to 50% by weight of zirconium concentrate and alumina is melted at a temperature of 1,950.degree. to 2,000.degree. C. The process according to the present invention makes it possible to jointly produce high-quality ferrosilicozirconium and zirconium corundum using single technology. Incorporation of alumina makes it possible to reduce the content of silica in zirconium corundum to 0.6% by weight, that of calcium oxide--down to 0.4% by weight, total iron content--to 0.2% by weight. Furthermore, incorporation of alumina makes it possible to increase productivity of process equipment (i.e. increase the output of zirconium corundum per one melting).

REFERENCES:
patent: 2905548 (1959-09-01), Taylor
patent: 2905549 (1959-09-01), Taylor
patent: 3021562 (1962-02-01), Chisholm
patent: 3101267 (1963-08-01), Dunn
patent: 3425826 (1969-02-01), Schmidt
patent: 4080194 (1978-03-01), Fey

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