V. M. Osterman, Solar Atmospheres, Souderton, PA
Increased usage in the aerospace and electronics industries of refractory metals, titanium, and their alloys has led to the use of the HDH process for recycling spent materials. Gaseous hydrogenation of spent parts containing tantalum, niobium, vanadium, or titanium provides a process in which unwanted end use material can be converted to a crushed aggregate, including fine powder, and later degassed to provide clean material for new applications. Parts arriving in various forms from sponge to waste clippings to ingots require different reaction parameters in the vacuum furnace. Development of hydrogenation production cycles depend on the reaction kinetics of the particular metal or alloy and its starting configuration, as well as the degree of embrittlement desired. Economical dehydrogenation cycles require care in order to prevent product sintering and/or reaction with the work fixturing while removing the hydrogen to sufficient levels for end use.
Summary: Vacuum furnace utilization of the hydride/dehydride process for recycling refractory metals, titanium, and their alloys will be discussed. Gaseous hydrogenation of spent parts containing tantalum, niobium, vanadium, or titanium provides a process in which unwanted end use material can be converted to a crushed aggregate, including fine powder, and later degassed to provide clean material for new applications.
