Alpine roller mill AWM

Vertical roller mills work on the principle of pressure comminution, which makes them suitable for brittle-elastic materials to be ground. The material to be ground is subjected to pressure between the grinding table and the grinding rollers. The specific grinding force (contact force divided by the cross-sectional area of ​​the grinding roller) ranges from around 0.5 to 1 N/mm², the effective pressures in the material bed are of course many times higher. The grinding table is set in rotation by a motor and a corresponding gearbox, with peripheral speeds of 2 – 6 m/s being used as a rule. Since the gearbox has to absorb the forces of the grinding rollers, it is equipped with an axial plain bearing (pad bearing).

• Vertical roller mill for final product fineness approx. 10 µm – 100 µm
• Preferred fineness range d ₉₇ = 50 µm
• Grinding roller bandages and grinding table made of wear-resistant special cast iron
• Conical grinding rollers, can be swiveled out hydraulically
• Turboplex fine classifier integrated in the upper part of the mill

Possible Applications

Vertical roller mills are robust and proven mills for soft to medium-hard mineral raw materials and industrial bulk goods. The advantages of the vertical roller mill are easy fineness adjustment and quick product changes. Vertical roller mills are used where high flexibility is required in production, for example for:

• limestone
• plaster
• dolomite
• talc
• petroleum coke
• bentonite
• quicklime