Increasing the leaching rate of bulk superalloy scrap by melting with aluminum. Report of investigations/1983
Technical Report
·
OSTI ID:6834371
The Bureau of Mines investigated a method for increasing the leaching rate of bulk superalloy scrap to facilitate recycling and recovery of critical metals such as Ni, Co, and Cr. Three superalloys were investigated, the cast-nickel-base superalloy IN-738, the wrought-nickel-base superalloy Rene-41, and the cast-cobalt-base superalloy Mar-M-509. Superalloys melted with 20, 30, 40, and 50 pct Al metal to form intermetallic compounds were easily crushed to a convenient particle size and reacted rapidly with acid solutions which dissolved the metals. For example, leaching 1/2-in pieces of unalloyed IN-738 with excess 6N HC1 at 95 degree C for 2 h dissolved about 0.5 pct, while leaching 10 g of minus 20-mesh 30 pct Al-70 pct IN-738 with excess 6N HC1 at 95 degrees C for 2 h dissolved 96.2 pct.
- Research Organization:
- Bureau of Mines, Reno, NV (USA). Reno Research Center
- OSTI ID:
- 6834371
- Report Number(s):
- PB-84-152156; BM-RI-8833
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
COBALT ALLOYS
DISSOLUTION
ELEMENTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
LEACHING
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
METALS
NICKEL ALLOYS
PROCESSING
RECOVERY
SCRAP
SCRAP METALS
SEPARATION PROCESSES
SOLID WASTES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
COBALT ALLOYS
DISSOLUTION
ELEMENTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
LEACHING
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
METALS
NICKEL ALLOYS
PROCESSING
RECOVERY
SCRAP
SCRAP METALS
SEPARATION PROCESSES
SOLID WASTES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES