Abstract
Development of a joule-heated ceramic melter, sponsored by the Energy Research and Development Administration, has been progressing for nearly 3 years. In January 1975, a ceramic-lined, direct joule-heated glass melter was started up and operated continuously for nearly 11 months. During this period, process testing was completed both while feeding simulated high-level waste calcine and while feeding simulated high-level liquid waste. While feeding waste calcine and frit, the unit was demonstrated at a production rate in excess of 45 kg of glass/hour, which meets the needs of a reference 5 MTU/day reprocessing plant. When the simulated liquid waste and frit slurry were fed to the system, a 25-liter/hr process rate was demonstrated. This capacity is equivalent to the needs of a 1.5 MTU/day reprocessing plant. Evaluation of the melter after 10.8 months of operation suggests that a melter life in excess of 2 years is likely. The operation of the engineering-scale ceramic melter has been encouraging. The high capacity of the melter with the capability for direct liquid feeding and a long operating life suggests that a joule-heated ceramic melter will play a major role in future waste solidification processes.
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