Description of the preferred embodiments
The composition and concentration of the various feed materials, products, by-products and intermediate by-products, are described in the specification and subjoined claims in terms of percentages by weight unless clearly indicated to the contrary.
Sintered, dense pellets or briquettes of a ferrotungsten alloy of the desired composition are produced in accordance with the present process by forming a substantially uniform mixture of a finely-particulated tungsten ore concentrate, a carbonaceous reducing agent and some supplemental iron-bearing material, if necessary, to adjust the iron content within the desired concentration range. The mixture is agglomerated and thereafter heated at an elevated temperature in an environment devoid of oxygen and in a substantial vacuum in a manner to effect a direct reduction of the tungstic oxide constituent to form metallic tungsten and an alloying thereof with the iron constituent present to produce the ferrotungsten alloy.
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