The Mikro® E-ACM is specially designed for the grit reduction of carbon black. It is a hybrid product that possesses many of the same design features of the Mikro® ACM Air Classifying Mill, which is an industry workhorse for a wide range of applications. In addition, the Mikro® E-ACM features various improvements that overcome the challenges of milling carbon black.
Enhancements lower grit levels The video describes many of the key features of the Mikro® E-ACM. Unlike standard air classifying milling systems, the carbon black feed material is fed in the primary air-stream from below the rotor of the Mikro® E-ACM. The internal parts and geometry of the grinding and classification sections have been modified to meet the particle characteristics and quality specification of carbon black. The internal re-circulation working principle of the air classifying mill has been replaced with our patented external coarse recycle system. All these enhancements yield product grit levels that are lower than competitive milling technologies.
The Model E-ACM has an external coarse recycle system which extracts oversize material and returns it to the grinding chamber for additional processing. The feed design introduces product from under the main rotor, ensuring that 100% of the feed material comes in contact with the impact rotor for optimal grinding efficiency. The processing of light density materials can be problematic because lighter material will float in the classifier zone and will not be easily recycled to the impact zone of the mill. The external re-circulation system of the Model E and the bottom feed ensure that all material is returned to the grinding chamber for more efficient size reduction.
Cohesive materials can sometimes stick and build up in the standard Mikro ACM® - Air Classifying Mill, due to the expanded surface area of the shroud and baffle assembly and the reduced tangential air velocity. The Model E has no internal shroud and baffle and therefore has no internal components where product could accumulate.
The Mikro® E-ACM can be installed in existing reactor lines at minimal capital cost. It can operate at process temperatures up to 200°C and processes up to 10 tons/hr. The unit offers better economics than the incumbent hammer and screen mill technology. Grit levels are reduced to as low as < 1 ppm+ 325 mesh. The Mikro® E-ACM is available with a drive motor ranging from 10 to 300 HP.