Pendulum Mill for Fine Grinding and Drying

The pendulum mill PM is a roller or horizontal mill. It is the further development of the proven Raymond and is suitable for fine grinding and drying soft to medium-hard ground material. Application examples include clay, bentonite, barite, phosphate, coal, quicklime, limestone and talc. Further areas of application include grinding pigments and chemical products.

Pendulum Mill: Proven Grinding Concept, Robust Construction

The pendulum mill consists of a sturdy, cast mill housing and a rotor with a crosshead. The grinding rollers travel at medium speeds on the grinding ring.

The arising centrifugal forces crush the grist between the grinding rollers and the grinding ring. Rotating shovels guide the grist from the mill bottom to the grinding zone. Then, system air transports the ground particles from the grinding zone to the classifier.

The classifier rejects the coarse product and guides it back into the mill for re-grinding. If the particles have achieved the desired fineness, they pass through the mill classifier. A downstream aggregate seperates it out of the air flow.


kg Throughput per hour


kW Output


m³ Air Quantity per hour

Minimal Grinding System Energy Requirements

The input quantities for the various mill sizes range from 0.5 t/h to 150 t/h. The NEA pendulum mill achieves high requirements for grain size distribution easily and extremely energy efficiently, even in case of the highest demands regarding the fineness to be achieved. The achievable upper particle sizes range from 10 μm to 1,000 μm.


  • Combined grinding, deagglomeration, drying and classification
  • Particle size topcut: 10 μm – 1.000 μm
  • Throughput: 0,1 t/h – 150 t/h
  • Mill power: 10 kW – 600 kW
  • Air quantity: 3.000 m³/h – 210.000 m³/h
  • Feed material particle size: 0 – 50 mm
  • Feed material moisture: 0 – 35 %
  • Grinding ring diameter: 500 mm – 2.700 mm
  • Number of pendulums: 1 – 5


  • Extremely robust and durable design, ideal for very hard feed material
  • High energy efficiency
  • Continuous and easy operation
  • Low noise and low vibration
  • Unique NEA classification technology for narrow particle size distribution and upper particle sizes.
  • Optional: “tailor-made” wear protection, maintainability via direct drive


  • Fertilizers: phosphates, sulfur, calcium, carbonate, ammonium sulfate
  • Oil field minerals: bentonite, barite
  • Pigments & paint: calcium carbonate, talc, iron oxide, chrome oxide, titanium dioxide, ultramarine
  • Clay & ceramics: tiles and roof tiles, bentonite, kaolin, china clay, bauxite, ceramic source material
  • Technical limestone cycle: GCC, CaCO3, CaO, Ca(OH)2
  • Fossil fuels: coal, lignite, coke and petroleum coke
  • Minerals: talc, graphite, sodium bicarbonate, crystalline silicic acid
  • Gypsum: autoclaved alpha gypsum, natural gypsum, calcined gypsum

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