Pulverizing lignite in a ring roller mill.
Ellman-RC; Dockter-L; Belter-JW
Grand Forks, ND: U.S. Department of the Interior, Bureau of Mines, RI 7631, 1972 Jan; :1-25
The Bureau of Mines studied lignite pulverization in a laboratory ring-roller mill. Both moisture content and the source of lignite were found to be important factors in pulverizer operation. Reduction of moisture content increased capacity and reduced power consumption, but predrying is more effective than in-the-mill drying in improving pulverizer operation. A combination predrier-crusher system produced significant improvements but other efforts to improve in-the-mill drying in the test mill were unsuccessful. Pulverization of frozen lignite was found to seriously reduce pulverizer capacity and increase power requirements.
IH; Report of Investigations
NTIS Accession No.
Grand Forks, ND: U.S. Department of the Interior, Bureau of Mines, RI 7631