Pyrometallurgical process for forming tungsten carbide

Details Pyrometallurgical process for forming tungsten carbide Pyrometallurgical process for forming tungsten carbide

1995-06-07

1999-03-16

Bos, Steven

Chemistry of inorganic compounds

Carbon or compound thereof

Binary compound

423439, 423 53, 423 61, C01B 3134, C22B 3400

Patent

active

058826203

ABSTRACT:
A process for forming a salt, such as sodium tungstate, using a pyrometallurgical operation is provided. A slagging operation is performed in which a metal-containing material is melted in the presence of slag formers such as sodium metasilicate and silica. The metal predominantly reports to a denser metal-containing phase. The denser metal-containing phase may then be subjected to gas sparging with a carbon-containing gas in order to form metal carbide, preferably tungsten carbide.

REFERENCES:
patent: Re32612 (1988-02-01), Gomes et al.
patent: 667705 (1901-02-01), Holloway et al.
patent: 1839518 (1932-01-01), Woods et al.
patent: 3012877 (1961-12-01), Foos et al.
patent: 3077385 (1963-02-01), Robb
patent: 3256057 (1966-06-01), Burwell
patent: 3266875 (1966-08-01), Romeo
patent: 3330646 (1967-07-01), Heinen et al.
patent: 3373097 (1968-03-01), Gomes et al.
patent: 3589987 (1971-06-01), Gomes et al.
patent: 3676105 (1972-07-01), McLeod et al.
patent: 3716627 (1973-02-01), Middelhoek
patent: 3800025 (1974-03-01), Fox
patent: 4190439 (1980-02-01), Gortsema
patent: 4353881 (1982-10-01), Quatrini et al.
patent: 4402737 (1983-09-01), Kronenwetter et al.
patent: 4489044 (1984-12-01), Gomes et al.
patent: 4504461 (1985-03-01), Carpenter et al.
patent: 4534956 (1985-08-01), Arendt et al.
patent: 4603043 (1986-07-01), Douglas et al.
patent: 4629503 (1986-12-01), Fruchter et al.
patent: 4752456 (1988-06-01), Yoda et al.
patent: 5096689 (1992-03-01), Terry et al.
patent: 5102646 (1992-04-01), Bienvenu
patent: 5188810 (1993-02-01), Sommers
patent: 5372797 (1994-12-01), Dunmead et al.
Kirk-Othmer Encyclopedia of Chemical Technology, Edition 3, vol. 23, 1987, Wiley & Sons, New York XP002062951, pp. 417-419.
John M. Gomes, Kenji Uchida, Don H Baker, Jr., "A High-temperature, Two-phase Extraction Technique for Tungsten Minerals", United States Department of the Interior, Bureau of Mines, Report of Investigations 7106, 1968, no month.
J.M. Gomes, A.E. Raddatz, T.G. Carnahan, "Preparation of Tungsten Carbide by Gas Sparging Tungstate Melts", Reno Research Center, Bureau of Mines, United States Department of the Interior, Presented at the 3rd International Tungsten Symposium, Madrid, Spain, May 13-17, 1985.
J.M. Gomes, A.E. Raddatz, T.G. Carnahan, "Preparation of Tungsten Carbide by Gas Sparging Tungstate Melts", Journal of Metals, pp. 29-32, Dec., 1985.
John M. Gomes, M.M. Wong, "Preparation of Tungsten Carbide by Electrodeposition", United States Department of the Interior, Bureau of Mines Report of Investigations 7247, 1969, no month.
John H. Gomes, Kenji Uchida, M.M. Wong, "Electrolytic Preparation of Tungsten Metal and Tungsten Carbide from Wolframite", United States Department of the Interior, Bureau of Mines Report of Investigations 7344, 1970, no month.
S. Hessel, B. Shpigler, O. Botstein, "A New Process for Production of Tungsten , Tungsten Carbide, and Tungsten Oxide Powders", Reviews in Chemical Engineering, vol. 9, pp. 345-364, No. 3-4, 1993, no month.
E. Vil'nianski and Z.L. Persits, "The Theory of the Soda-Silica Process for the Production of Sodium Tungstate From Scheelite", Journal of Applied Chemistry of the USSR, vol. 21, No. 5, pp. 663-667, May, 1958.
Metallurgy of Rare Metals, 2nd Ed., pp. 12-18, 24, 25, 1964, no month.

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