Preparation of Tungsten Carbide by Gas Sparging Tungstate Melts.
Gomes JM; Raddatz AE; Carnahan TG
Pres At Metall Soc AIME 113th Annual Mtg Los Angeles, California, 1984 Feb; :12 pages
The Bureau of Mines is investigating a novel method for the separation of tungsten carbide from concentrates. The method eliminates several steps in the conventional method. Wolframite or scheelite is decomposed in a two-phase chloride-silicate melt. Tungsten is concentrated in the chloride phase as sodium tungstate, and the iron, manganese, or calcium oxides are retained in the silicate phase. After separating the phases, the molten chloride- tungstate phase is sparged with hydrocarbon gas and yields tungsten monocarbide. The paper discusses bench-scale research that delineates operating variables.
Pres. At Metall. Soc. AIME 113th Annual Mtg., Los Angeles, California, Feb. 26-Mar. 1, 1984, 12 PP.