Thermite smelting of ferromolybdenum

Details Thermite smelting of ferromolybdenum Thermite smelting of ferromolybdenum

1976-09-29

1977-09-13

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 27, C22B 504

Patent

active

040479420

ABSTRACT:
A process for producing ferromolybdenum alloys by thermite smelting of a particulated reaction mixture composed of a molybdenum oxide concentrate, an iron bearing material, a reductant and a slag fluxing agent present in controlled proportions. The reaction mixture is progressively charged into a refractory crucible and is exothermically reacted to produce a molten mass of ferromolybdenum alloy having a molten layer of slag floating on the upper surface thereof. The charging of the reaction mixture is interrupted for prescribed time intervals to permit the mass of ferromolybdenum alloy to solidify, and optionally, to permit a withdrawal of the major portion of the molten slag layer from the upper stratum thereof, whereby a multi-layered ingot is produced comprising layers of metallic ferromolybdenum separated by intervening residual slag layers.

REFERENCES:
patent: 1437272 (1922-11-01), Skelley et al.
patent: 3740199 (1973-06-01), Gammill et al.

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