媒体攪拌ミルによる石炭の微粉砕 [in Japanese] Fine Grinding of Coal with a Stirred Ball Mill [in Japanese]
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In production of super-clean coal by any physical coal-cleaning process, the feedcoal must be micronized to liberate finely disseminated mineral matter. One of the most efficient devices for micronizing coal is a stirred ball mill. Using the laboratory mill with a relatively high media loading (80 % filling), small grinding media (less than 1 mm diameter), and three coals, effects of some parameters such as media size, stirring speed, and pulp density on the grinding of coals have been studied. The product with a mediansize of 2μm was obtained at a suitable operating conditions with a mean residence time of 6 min. The wear loss of the grinding media and vessel depended strongly on the amount of the hard minerals disseminated in coal, such as quartz, pyrite and iron oxide.
- Journal of MMIJ
Journal of MMIJ 113(8), 619-623, 1997-08
The Mining and Materials Processing Institute of Japan