Bureau of Mines / Minerals yearbook metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Magnesium, pp. 735-745 ff. PDF (829.8 KB)
MAGNESIUM 745 vanadium dichloride with magnesium.4 The resultant vanadium metal product has a purity greater than 99.8%. The high efficiencies in the individual process steps indicated that vanadium produced with snagnesium as the reductant has an excellent potential from an economic standpoint. Other investigations by the Bureau of Mines demonstrated that nitrogen was an effective medium for quenching magnesium vapor produced in the carbothermic process.5 Contrary to prior belief, the formation of magnesium nitride was not a major problem. For the carbothermic process to be cost competitive with the electrolytic process, large volumes of the quenching agent must be available at low cost. Nitrogen is available in abundant supply, and as a byproduct of oxygen production in steel and other metallurgical plants, should be relatively inexpensive. According to the American Cast Iron Pipe Company (Acipco), Birmingham, Ala., magnesium-impregnated coke (MagCoke) is an effective desulfurizing agent for steel.6 Acipco estimated that 1 pound of Mag-Coke would remove 0.018% of sulfur per ton of iron; the removal of 0.01% of sulfur per ton of iron would cost 25 to 30 cents. Spokesmen for several steel producers confirmed experimenting with MagCoke. Republic Steel Corp. reported that the use of Mag-Coke was beyond the research stage and was being used in regular iron production at its Warren, Ohio, and Gadsden, Ala., facilities. Campbell, T. T., J. L. Schaller, and F. E. Block. Preparation of High-Purity Vanadium by Magnesium Reduction of Vanadium Dichloride. Metallurgical Trans., v. 4, No. 1, January 1973, pp. 237—241. ' Dean, K. C., V. E. Edlund, and A. G. Lawrence. Quenching Carbothermic Magnesium With Nitrogen. Light Metal Age, v. 30, Nos. 5—6, June 1972, pp. 21—23. 6American Metal Market. Steelmakers Confirm Magnesium Used as Sulfur Removing Agent. V. 79, No. 113, June 16, 1972, p. 4.
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