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LIST OF FIGURES (conti_,.'ed) 52. Moisture Reabsorption of Dried Coals versus IFB Drying Temperature for Eagle Butte and Usibelli Coals ....

This project is a major step in the Department of Energy's program to show that ultra-clean coal-water slurry fuel (CWF) can be produced from selected coals and that this premium fuel will be a cost-effective replacement for oil and natural gas now fueling some of the industrial and utility boilers in the United States. The replacement of oil and gas with CWF can only be realized if retrofit costs are kept to a minimum and retrofit boiler emissions meet national goals for clean air. These concerns establish the specifications for maximum ash and sulfur levels and combustion properties of the CWF. This cost-share contract is a 48-month program which started on September 30, 1992. This report discusses the technical progress made during the 4th quarter of the project from July 1 to September 30, 1993. SPECIFIC OBJECTIVES OF PROJECT The project has three major objectives: • The primary objective is to develop the design base for prototype commercial advanced fine coal cleaning facilities capable of producing ultra-clean coals suitable for conversion to coal-water slurry fuel for premium fuel applications. The fine coal cleaning technologies are advanced column flotation and selective agglomeration.

is also acknowledged for their assistance and financial support. The support and interest of Amax Coal Industries is greatly appreciated. Amax Coal purchased virtually ali of the processing equipment used in this test work. AMAX Inc. has also shown interest in the project and provided support by the purchase of analytical instruments. This interest and support is greatly appreciated. We would like to thank BEI Engineers and Constructors of Lakewood, Colorado, for their assistance in the design of the process research unit (PRU) used in this work. TIC of Steamboat Springs, Colorado, built the PRU and their assistance is acknowledged. Roger Nichting of the Materials Processing Department at Amax R&D provided expertise and performed test work with regard to materials oF construction. The PRU was operated by a highly skilled and dedicated group of technicians: Tony Blandon, Dave Meyer, and Mario Robles. They were assisted by Mike Danz, Steve Smith, and Don Thompson. Wendy Kennedy word processed this final report and ali of the reports prepared for this project.

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