Most new cement plants utilise vertical roller mills (VRM) for raw material grinding and preparation. Taking a step-by-step look at the entire roller milling process, Kline Consulting recommends routine measurements and discusses ways to overcome chemical issues to optimise operations.
The vertical raw mill has several advantages over previously-used mill systems including:
• lower power consumption
• less part wear/consumption
• incorporation of drying with waste heat.
Previous technologies included ball mills with higher power consumption and part wear rates, and were not capable of higher levels of raw material drying. Double rotator mills, an off-shoot of ball mill technology, allowed for a higher level of drying, at the expense of good air and material sealing.