Engineering development of advanced physical fine coal cleaning technologies: Froth flotation. Quarterly technical progress report No. 12, July 1, 1991--September 30, 1991
The design criteria for each unit operation have been developed based upon a number of variables. These variables, at this time, are based upon the best engineering design information available to industry. A number of assumptions utilized in the design criteria are uncertain. The uncertainties of inert atmospheres for grinding and flotation as well as pyrite depressants were answered by the Surface Control Project. It was determined that inerting was not required and no ``new`` reagents were presented that improved the flotation results. In addition, Tasks 5 and 6 results indicated the required reagent dosage for conventional flotation and advanced flotation. Task 5 results also indicated the need for a clean coal,thickener, the flocculent dosages for both the clean coal and refuse thickeners, and final dewatering requirements. The results from Tasks 5 and 6 and summarized in Task 7 indicate several uncertainties that require continuous long duration testing. The first is the possibility of producing a grab product for both the Pittsburgh and Illinois No. 6 coals in conventional flotation. Second what does long-term recirculation of clarified water do to the product quality? The verification process and real data obtained from Tasks 5 and 6 greatly reduced the capital and operating costs for the process. This was anticipated and the test work indeed provided confirming data.
- Research Organization:
- ICF Kaiser Engineers, Inc., Pittsburgh, PA (United States); Ohio Dept. of Development, Columbus, OH (United States). Coal Office; Babcock and Wilcox Co., New Orleans, LA (United States); Consolidation Coal Co., Pittsburgh, PA (United States); Center for Research on Sulfur in Coal, Carterville, IL (United States); EIMCO Processed Equipment Co., Salt Lake City, UT (United States); Illinois State Geological Survey, Champaign, IL (United States); Kentucky Energy Cabinet Lab., Lexington, KY (United States); Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-88PC88881
- OSTI ID:
- 10139519
- Report Number(s):
- DOE/PC/88881-T12; ON: DE93011456
- Resource Relation:
- Other Information: PBD: 1991
- Country of Publication:
- United States
- Language:
- English
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