Atritor Dryer-Pulveriser
External fan Atritor Dryer-Pulveriser
The Atritor Dryer-Pulveriser has been in continuous manufacture for over 90 years. It has a unique design with pulverising occurring predominantly by attrition. The mill is a very compact air-swept flash dryer and temperature differentials of over 500°C ensure high evaporative capacity and thermal efficiency.
Internal wear parts are manufactured from specially-formulated abrasion resistant irons produced in our own foundry. They are extremely quick and easy to change through the hinged door of the mill.
The size of the feed can be up to 50mm with grinding capacities as high as 20 tonnes per hour.
The mill incorporates an integral product particle size controller for consistent product quality, which, unusually, is unaffected by processing rate.
The 'B'-series extends the evaporative capacity of a single unit to six tonnes per hour. 'B'-series machines are of lighter construction, designed for operation on non-abrasive materials and where drying is the major function.
Cross section of Atritor Dryer-Pulveriser, showing the flow of material through the mill
Brochure and Publication Downloads
Atritor Dryer-Pulveriser
Languages: German [515 KB] English [561 KB] French [609 KB] 
Production of Pulverised Fuels
Languages: English [2.66 MB]
Typical Feed Materials
| Activated earth | Alumina trihydrate (ATH) | Barytes | Bentonite | Burnt lime |
| Calcium carbonate | Calcium hydroxide | Cellulose acetate | Chalk | Chicken manure |
| Clay | Coal | Cocoa | Coffee grounds | Cuprous oxide |
| Dolomite | Dyes | Fertiliser | Fish meal | Fluorspar |
| Graphite | Gypsum | Industrial sludges | Iron oxides | Kaolin (china clay) |
| Lignite | Limestone | Magnetite | Paper waste | PCC |
| Petroleum coke | Pigments | Potassium sulphate | Sewage sludge | Slaked lime |
| Starch | Talc | Tricalcium phosphate | Ultramarine | Wood pulp |
| Zinc borate | Zinc dioxide |
Technical Data
| Units | 1B | 4A/B | 6A/B | 8A/B | 11A/B | 16A/B | 17A/B | 18A/B | 20A/B | |
|---|---|---|---|---|---|---|---|---|---|---|
| Max. speed | rpm | 5,000 | 2,000 | 1,750 | 1,500 | 1,350 | 1,210 | 1,075 | 970 | 850 |
| Max. power | kW | 2.2 | 15 | 30 | 37 | 45 | 75 | 110 | 160 | 250 |
| Min. power | kW | 1.1 | 5.5 | 11 | 15 | 22 | 37 | 45 | 75 | 132 |
| Max. airflow 'A' | m3/h | - | 1,250 | 2,500 | 3,400 | 5,000 | 8,500 | 12,500 | 20,000 | 34,000 |
| Max. airflow 'B' | m3/h | 200 | 1,750 | 3,500 | 5,000 | 7,500 | 13,000 | 20,000 | 30,000 | 50,000 |
| Max. evaporation 'A' | kg/h H2O | - | 140 | 300 | 410 | 600 | 1,020 | 1,500 | 2,400 | 4,000 |
| Max. evaporation 'B' | kg/h H2O | 25 | 200 | 420 | 600 | 900 | 1,560 | 2,400 | 3,600 | 6,000 |
| Max. capacity | kg/h | 100 | 1,500 | 3,000 | 4,000 | 6,000 | 10,000 | 15,000 | 24,000 | 40,000 |