Roller Mills
These have been used for many years for the less exacting raw-milling process, but recently roller mills, in combination with high-efficiency separators, have been used for cement grinding. The grinding action employs much greater stress on the material than in a ball mill, and is therefore more efficient. Energy consumption is typically half that of a ball mill. However, the narrowness of the particle size distribution of the cement is problematic, and the process has yet to receive wide acceptance.
Read more about this topic: Cement Mill
Famous quotes containing the words roller and/or mills:
“And thus Snow White became the prince’s bride.
The wicked queen was invited to the wedding feast
and when she arrived there were
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—Anne Sexton (1928–1974)
“They give us a pair of cloth shorts twice a year for all our clothing. When we work in the sugar mills and catch our finger in the millstone, they cut off our hand; when we try to run away, they cut off our leg: both things have happened to me. It is at this price that you eat sugar in Europe.”
—Voltaire [François Marie Arouet] (1694–1778)