Mikro ACM classifier mill – superfine grinding
The Mikro ACM was launched on the market in 1962 as the first classifier mill and has been continuously improved since then to accommodate changing market needs. It is suitable for the size reduction of a great variety of products such as cocoa, chocolate mixes, lactose, fish food, etc. The combination of impact grinding with the integrated dynamic classifier constitutes the perfect solution especially for the fine and ultrafine comminution of soft to medium-hard products. The crystallised sugar is fed into the Mikro ACM pneumatically. Size reduction is a result of the feed product impacting against the rotating grinding elements and against the stationary liner. At beater tip speeds of more than 130 m/s, fineness values of d99 < 20 µm (635 mesh) can be achieved for icing sugar. The product becomes entrained in the cooling, conveying and classifying air drawn through the mill by the downstream fan. Characteristic for the Mikro ACM is the integrated dynamic classifier. The product/air mixture is distributed uniformly by the guide vane ring to the rotating classifying wheel. Because of the two opposing forces and the different masses of the particles, the product is separated in the classifying zone into a coarse fraction and a fine fraction. The coarse material is rejected by the classifying wheel and returned to the grinding zone for further comminution. The fines pass through the classifying wheel and exit the mill. The cut point is a function of the classifying wheel speed, which can be steplessly adjusted even during operation.
The Mikro ACM is available in almost 20 sizes with drive capacities ranging between 3 and 450 kW.