1.lower consumption 2. high thermal efficiency 3. high performance 4. easy to operate Application:dry the materials such as ore slag, sand, coal, coal ash, iron power, ore ,quartz sand and so on Features:1.High technical content, self insulation cylinder body, 80% thermal efficiency (single- cylinder dryer is only 35%), coal saving is 68% than single-cylinder dryer and output increases 100%2. The ...