Critical review of current industrial scale lignite drying ...
2017-1-1u2002·u2002Rotary-tube (indirect) dryers. The second type of rotary dryers is the so-called indirect or rotary-tube dryer. This kind of dryers is widely used for drying of lignite in briquetting plants and drying of hard coal. The drying medium used is saturated steam, whose pressure ranges between 0.15 MPa and 0.55 MPa. In the most common configuration ...
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