Dry coal cleaning in a MagMill
- EXPORTech Co., Inc., New Kensington, PA (United States)
- Central Illinois Public Service Co., Springfield, IL (United States); and others
Precombustion cleaning of coal is one of the most effective methods of removing unwanted minerals and pollutants. Coals are wet-cleaned at the mine to remove non-combustible minerals and to lower the concentration of pollutants such as sulfur. Because of the high cost of pulverizing, cleaning, dewatering, and shipping fine sized coal, wet cleaning is carried out at the coarsest size practicable which limits the effectiveness of the wet coal cleaning process. As an alternative to wet coal cleaning at the mine mouth, a practical and economically sound dry coal cleaning technology called the MagMill has been developed by EXPORTech Company, Inc. (ETCi). A portion of the development effort has been focused on sampling a variety of pulverizers. Three (3) different types of pulverizers (ball, roller, and bowl mill) which are commonly used by the utility industry have been tested in operation. Results of this testing and preliminary results of magnetic separation of the mill samples are reported in this paper.
- OSTI ID:
- 490293
- Report Number(s):
- CONF-970310--
- Country of Publication:
- United States
- Language:
- English
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