Ultrafine coal single stage dewatering and briquetting process
- Univ. of Missouri, Rolla, MO (United States). Mining Engineering Dept.
The primary goal of the current physical coal cleaning process is to reduce the ash and sulfur content from the coal, that is, to remove the mineral particles from the coal. In order to separate mineral from coal particles efficiently, the finely disseminated mineral matter must be liberated from the coal matrix with the help of an ultrafine grinding operation. The coal becomes very difficult to dewater because of the small particle size produced. Difficulty in coal transportation as well as in its storage and handling at the utility plants are also problems associated with the small coal particles resulting from ultrafine grinding. During this project, several types of coal samples with various particle size distributions have been tested for use in the dewatering and briquetting processes. Furthermore, various bitumen emulsions have been tested to determine the optimum dewatering reagent. These dewatering and pelletizing tests were carried out using a lab-scale hydraulic compacting device. Discharge from the dewatering and briquetting processes was tested to determine compliance with current federal and state requirements. The influence of bitumen emulsion on the sulfur content of coal pellets made were also examined. In addition, a ram extruder which can be operated continuously to simulate a rotary press operation, has been built and is currently being tested for use in the fine coal dewatering and pelletizing process.
- OSTI ID:
- 257111
- Report Number(s):
- CONF-950952--
- Country of Publication:
- United States
- Language:
- English
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Ultrafine coal single stage dewatering and briquetting process. Technical report, December 1, 1994--February 28, 1995
Ultrafine coal single stage dewatering and briquetting process. Technical report, September 1--November 30, 1994