Vacuum smelting process for producing ferrotungsten

Details Vacuum smelting process for producing ferrotungsten Vacuum smelting process for producing ferrotungsten

C - Chemistry, Metallurgy

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C

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C22C 38/22 (2006.01) B22F 9/20 (2006.01)

Patent

CA 1097950

Abstract of the Disclosure A process for producing ferrotungsten alloys by forming a uniform mixture comprised of a finely-particulated tungsten- containing mineral, such as wolframite, scheelite, ferberite, and/or huebnerite; a supplemental quantity of a particulated iron-bearing material and a controlled amount of a carbonaceous reducing agent which is agglomerated into a plurality of pellets which are heated to an elevated temperature under a controlled vacuum for a period of time sufficient to effect a reduction of the tungstic oxide constituent to the metallic state and volatilization and extraction of the volatile constituents in the pellets, and an alloying of the metallic tungsten with the iron constituent, producing substantially dense sintered ferrotungsten alloy pellets. The pellets are suitable for use as an alloying addition agent in iron and steel-making operations.

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