MÖLLER Airlift

If you want to transport bulk material safely and with low maintenance you'd make the right choice with the FLSmidth-Airlift. This economically pneumatic conveying system is particularly suitable for high capacities and strongly abrasive bulk materials.

  • Product profile
  • Applications
  • High availability
  • Equipment variants
  • Vertical conveying up to 800 t/h of powdery and finegrained bulk materials
  • Conveying height more than100 m
  • Maintenance-free (no rotating parts)
  • Compact, space-saving design
  • Low specific energy consumption
  • Temperature resistant up to 300°C
  • Completely dust-free operation
  • High reliability
  • Very low wear



The MÖLLER® Airlift has been developed for vertical transportation of powdery and fine-grained bulk materials.

It is used world-wide for hundreds of applications in the cement-, lime-, gypsum industry, in metallurgical plants, in ash removal installations of power stations, in the aluminium industry and in all other industries where bulk materials have to be conveyed without any problems.

Throughputs up to 800 t/h are possible. A conveying height of more than 100 m can be achieved.

The Airlift basically consists of the elevator housing (transmitter), the conveying line and the expansion separator (receiver). The communicating effect between the material column in the elevator housing and the flowing material-air mixture in the conveying line is utilised for material conveyance.

When the elevator housing is filled, the fluidised bulk material is pressed towards the booster nozzle by the pressure of the material column, and the air jet escaping there conveys the bulk material into the pickup pipe of the conveying line arranged directly above the nozzle.

The material contained in the elevator housing seals off the plant towards the material inlet. The throughput increases with rising material level. The cylindrical part of the elevator housing is available in different heights depending on the bulk material to be conveyed and the conveying height.

The booster nozzle is centrally arranged in the bottom of the nozzle. Around it are fluidising areas to ensure material flow. A non-return valve prevents that bulk material enters into the air pipe.

At the upper end of the conveying line, material and air flows are separated by the expansion separator

The MÖLLER Airlift does not use any mechanical or drive elements and is therefore not subject to wear to these elements like conventional vertical conveyors.

This means high availability at low specific energy consumption. The bottom part of the conveying line centrally arranged above the booster nozzle can be exchanged.

Inspection glasses are placed in the cylinder for control of the filling level. A control circuit is built up between the Airlift filling level and the feeding dosing unit for fully automatic operation.


If extremely abrasive materials are conveyed, the exchangeable pickup pipe will be made of particularly wear resisting material.

The Airlift can be equipped with fluidisation fabric for bulk material temperatures of up to 300°C.

The material can be fed into the upper cylindrical part of the elevator housing vertically or horizontally.

Should the bulk material contain large contaminants the Airlift can be equipped with a grating to remove these contaminants from the conveying process. When the plant is shut down, they can be removed through the manhole.