Some Problems in the Melting and Casting of Uranium and Its Alloys
F. H. Hueston and R. S. Barclay Eldorado Mining & Refining Ltd., Refining Division, Port Hope, Ontario
Depending on the application, zirconia, fused magnesia and graphite have been found to be the most suitable crucible materials for melting uranium metal and its alloys. Although graphite has been found to be satisfactory for uranium and uranium alloy castings with cross sections of 4 square inches or greater, ceramic-type molds are superior for small sections and those shaped castings which prohibit the economic use of machined graphite molds. Heating cycles, addition mechanisms and furnace conditions for melting are discussed.