Test studies on hot-water drying of lignites from China
Conference
·
OSTI ID:324609
- Heilongjiang Mining Inst. (China)
The high inherent moisture in lignite is responsible for its low heating value and difficulties in its processing and utilization. The Clean Coal Technology Institute of the Heilongjiang Mining Institute has been investigating lignite beneficiation by hot-water drying (HWD). HWD tests have been performed on lignites from the Dayan Mineral Bureau and Yiminhe Coal and Power Company in Inner Mongolia, and the Shulan Mineral Bureau in Jilin Province. Although lignite specific differences were noted following HWD, all lignites showed significant decreases in the equilibrium moisture level and corresponding increases in heating value. HWD increased the hydrophobicity of the lignite surface to such an extent that the hot-water dried lignites could be concentrated by froth flotation with good separations. After HWD these lignites could also be formulated into coal-water fuels with commercially viable solids concentrations. The high volatile matter content and non-agglomerating tendency of lignite is preserved in these LWFs giving excellent combustion characteristics. Burning as LWF also reduces flame temperatures leading to lower NOx emissions.
- OSTI ID:
- 324609
- Report Number(s):
- CONF-970931--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Preparation and combustion of Yugoslavian lignite-water fuel, Task 7.35. Topical report, July 1991--December 1993
Hot-water drying of a lignite slurry in water. [M. Sc. Thesis]
Production and combustion of hot-water-dried lignite slurries
Technical Report
·
Mon Feb 28 23:00:00 EST 1994
·
OSTI ID:10168030
Hot-water drying of a lignite slurry in water. [M. Sc. Thesis]
Technical Report
·
Sun May 01 00:00:00 EDT 1983
·
OSTI ID:6294716
Production and combustion of hot-water-dried lignite slurries
Conference
·
Thu Feb 28 23:00:00 EST 1985
·
OSTI ID:5964537