Production of SYNROC through melting in ``cold crucible``
- SIA Radon, Moscow (Russian Federation)
- Univ. of Electric Engineering, St. Petersburg (Russian Federation)
SYNROC is titanate-based material consisting of congruently melting minerals. Experiments on production of SYNROC-C composition under oxidizing and reducing conditions were performed. The SYNROC melts at temperatures close to 1,400 C. A high frequency with {approximately} 60 kW of vibrating power operated at 5.28 or 1.76 MHz was applied. Internal crucible diameter was 80--160 mm. It is necessary to overheat a melt for melting process stabilization. The operating temperature was determined to depend on operating frequency and crucible dimensions and ranged between 1,320--1,330 and 1,600--1,700 C. Continuous and semi-continuous modes of operation were tested. A melt capacity was widely varied depending on crucible dimensions, operating frequency and power. For a crucible with a round cross-section, 100 mm in diameter, operating at a frequency of 1.76 MHz with 60 kW of output power of hf generator, the capacity measured was approximately 10--15 kg/h at semi-continuous mode of operation. In SYNROC-C produced in cold crucible under reducing conditions only the same crystalline phases as hot-pressed SYNROC-C were found. Production of SYNROC-C under oxidizing conditions yielded a minor additional powellite phase. The basic properties of melted and hot-pressed SYNROC-C were established to be similar.
- OSTI ID:
- 182979
- Report Number(s):
- CONF-950917--; ISBN 0-7918-1219-7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
CERAMICS
CESIUM
CHEMICAL COMPOSITION
CORROSION RESISTANCE
EXPERIMENTAL DATA
HIGH-LEVEL RADIOACTIVE WASTES
INDUCTION FURNACES
LEACHING
MELTING
MOLYBDENUM
NEODYMIUM
OXIDIZERS
PERFORMANCE TESTING
PHASE STUDIES
PRODUCTION
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTE PROCESSING
REDUCING AGENTS
SPENT FUELS
STRONTIUM
SYNTHETIC ROCKS
WASTE FORMS
X-RAY DIFFRACTION