Molten-caustic-leaching system integration project. Technical progress report, quarter ending September 25, 1992
The overall strategy for the project Tasks 1 through 6 was to allow for the earliest startup of the Task 6 integrated operations with a minimum of up front costs attributed to plant modifications. The necessary modifications were those affecting the operation of the vacuum filters and the evaporator which were critical for integrated operation. Those modifications were completed and, after a series of off-line tests were performed to verify the operation of the vacuum filters and the evaporator, a week of continuous around-the-clock shakedown test operations was conducted starting on June 3, 1991. Problems with filtration during the June 1991 test run (high level of coal fines) indicated that the Pittsburgh coal in our inventory might be weathered. Coal sample analysis showed an increase in sulfate sulfur and a decrease in heating value, also indicative of weathering. Although TRW had more than enough coal in inventory to complete the planned test matrix, TRW obtained fresh coal to avoid the problems associated with weathering and disposed of the weathered coal in inventory. TRW also disposed of the remaining liquids and coal/caustic solids from the previous program. Repairs to centrifuges and plant modifications required to resume test operations were made. Additional off-line tests of plant component equipment were performed, and a second week of continuous around-the-clock integrated test operations was conducted starting on May 14, 1992 using fresh coal. An integrated unit-by-unit test of the entire MCL wash train was conducted in June 1992, and in July 1992 a series of MCL coal and water separation tests were performed in a 9-inch solid bowl centrifuge to obtain scaleup data.
- Research Organization:
- TRW, Inc., Redondo Beach, CA (United States). Applied Technology Div.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-86PC91257
- OSTI ID:
- 10109350
- Report Number(s):
- DOE/PC/91257-T13; ON: DE93006003
- Resource Relation:
- Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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