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Bureau of Mines / Minerals yearbook metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)

Chin, E.
Magnesium,   pp. 735-745 ff. PDF (829.8 KB)

Page 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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