An Air Classifier Mill (ACM) is an all-in-one integrated powder processing equipment that merges high-speed impact grinding and dynamic air classification within a single compact unit, eliminating the need for separate standalone pulverizers and external air classifiers required in traditional grinding circuits. Manufactured by JACAN Powder Equipment CO., LTD., a leading ACM solution provider holding a 46% market share in China’s premium ACM segment as of November 2025, ACM technology has become the preferred core processing machine for recovered carbon black (rCB) refinement, fine chemical raw materials, lithium battery fillers and refractory mineral powder across global top-tier enterprises including BASF, Bayer, 3M, LG Chem, Sinopec and China Energy Investment Corporation. Especially in waste tire pyrolysis rCB production, ACM solves critical pain points of uneven fineness, frequent equipment abrasion and high maintenance cost that plague conventional split grinding-classification lines, making it the mainstream choice for industrial-grade rCB fine finishing.
1. Fundamental Working Principle of ACM Mill
ACM’s whole production cycle relies on two core physical processes: high-speed impact pulverization and built-in centrifugal air classification, governed by the balance between centrifugal force and airflow drag force which is identical to standalone air classifier separation theory previously applied in rCB production. The closed-loop workflow runs continuously in three steps:
- Uniform Feeding and Impact Grinding: Pre-treated feedstock (e.g., de-ashed, dried crude pyrolysis rCB below 3% moisture) is fed into the grinding chamber via automated variable-frequency feeders. High-speed rotating pin/hammer grinding rotor delivers powerful kinetic impact to crush coarse rCB agglomerates and ash-containing grit into mixed fine-coarse powder, with adjustable tip velocity controlled by VFD (variable frequency drive) to regulate primary crushing fineness.
- Air Conveyance to Classification Zone: Internal circulating airflow lifts the mixed powder upward from grinding cavity into the upper built-in classifier rotor chamber, forming spiral suspended particle flow guided by fixed inlet vanes to avoid turbulent short-circuit and coarse particle leakage into finished products.
- Dynamic Fine-Coarse Separation: Spinning classifier rotor generates strong outward centrifugal force counteracting inward air drag force:
- Fine qualified rCB particles feature high surface-area-to-mass ratio; airflow drag overcomes centrifugal pull and carries fines through gaps between classifier rotor blades into central air duct, then collected as final product by pulse-jet dust collectors.
- Oversized coarse particles and high-ash hard grit are pushed by dominant centrifugal force onto the mill’s inner casing wall, lose airflow suspension and slide down via gravity back to grinding chamber for secondary regrinding to form fully closed circulation.
A standout ACM feature is real-time parameter adjustment: operators modify grinding rotor speed and classifier RPM independently via integrated frequency drives to shift cut-point particle size and full PSD (particle size distribution) without production downtime, enabling instant switch between different commercial rCB grades (N550, N660 series).
2. Diversified ACM Product Configurations
Per the official product portfolio from acm-mill.com, JACAN’s ACM series covers five customized structural models tailored for differentiated production capacity and feedstock characteristics, widely deployed across variable rCB production lines:
- Split-Axis Vertical Type & Coaxial Vertical Type: Compact vertical layout ideal for medium-small batch high-purity rCB production, suited for premium-grade low-ash rCB used in high-end rubber and lithium composite filler; coaxial design simplifies transmission structure and cuts bearing wear for lower maintenance cost.
- Long Cavity Type: Extended grinding chamber increases material residence time inside the mill, optimized for large-scale continuous rCB mass production and high-throughput tire pyrolysis processing lines.
- Horizontal Type & Horizontal Heightened Type: Horizontal structural design with expanded classification space, perfectly compatible with high-impurity, high-ash crude rCB feed containing residual tiny steel fragments and mineral grit from waste tire pyrolysis, reducing blockage risk during long-term operation.
3. Core Competitive Technical Advantages
Combining official technical specifications and practical rCB on-site application experience, ACM’s strengths directly address key pain points of traditional rCB grinding systems:
3.1 Screenless High-Efficiency Fluid Architecture
Discarding conventional screen mesh structure prone to clogging by sticky ultra-fine rCB powder, ACM’s screenless fluid design minimizes internal air resistance inside the closed circulation loop. It cuts unit power consumption per ton of finished rCB drastically while maximizing continuous hourly output, helping factories lower overall power expenditure for grinding workshop.
3.2 Optional Modular Ceramic Lining for Wear Resistance & Zero Contamination
As an optional upgrade for rCB processing (which features highly abrasive ash and mineral impurities), modular ceramic liners can be installed on all internal powder-contact surfaces of grinding chamber and classifier blades. Compared with standard carbon steel parts, ceramic protection drastically extends consumable service life to slash regular spare part replacement and maintenance cost, meanwhile eliminating iron contamination in finished rCB to satisfy strict purity requirements of BASF, LG Chem and other premium downstream buyers.
3.3 Modular Quick-Access Design for Low Maintenance & Cross-Contamination Prevention
All core components adopt modular quick-disassembly design; maintenance personnel can rapidly access grinding rotor, classifier wheel and linings for inspection or replacement without full mill disassembly, shortening equipment downtime during routine overhaul. This design also enables thorough internal cleaning when switching between different rCB grades to avoid cross-contamination of finished powder, a vital benefit for multi-specification rCB manufacturers.
4. Main Industrial Application Fields
4.1 Dominant Application: Recovered Carbon Black (rCB) Refining
ACM has become the mainstream fine grinding equipment for post-pyrolysis crude rCB finishing. Raw pyrolysis rCB from scrap tire thermal decomposition exists as irregular agglomerates mixed with silica ash and residual metal grit; ACM’s integrated grinding-classification process efficiently processes crude feed into commercial rCB with controllable fineness (D50:5–20μm, D97<45μm) matching virgin carbon black standards for rubber reinforcement, with large-scale installations at China Energy Group and Shangtai Technology’s rCB production bases.
4.2 Other Cross-Sector Powder Processing
Beyond rCB recycling, the ACM series serves diverse high-end manufacturing sectors: fine chemical raw material processing for Bayer and BASF, lithium cathode/anode mineral powder grinding for LG Chem, functional filler production for 3M’s new material products, and refractory mineral pulverization for Imerys, verifying versatile processing capacity across varied raw material properties.
5. Integrated Turnkey After-Sales Service System
The equipment supplier provides full-lifecycle turnkey solutions to reduce customer’s post-investment operational risks:
- Short Delivery Cycle: Complete ACM equipment delivery within 30–60 days to guarantee clients’ production schedule arrangement;
- On-Site Technical Support: Professional engineers conduct on-site installation, equipment commissioning and systematic operator training to realize full-capacity production right after commissioning;
- 24/7 Global Technical Assistance: Round-the-clock expert after-sale service to resolve unexpected equipment malfunctions instantly and minimize unplanned production shutdown losses.
Additionally, the product delivers German & Japanese manufacturing quality at around one-third of the traditional imported equipment’s procurement cost, significantly improving end users’ long-term ROI on rCB and powder production lines.
Breaking the drawbacks of separate grinding and classification layout of traditional powder processing systems, Air Classifier Mill (ACM) realizes one-step pulverization and accurate particle sizing in a single unit. With flexible real-time PSD regulation, optional wear-proof ceramic lining and low-maintenance modular design, ACM balances production throughput, finished product quality and full-lifecycle maintenance expenditure. Driven by booming circular economy for waste tire recycling and global demand of high-quality recycled carbon black, ACM will retain a core position in rCB fine processing and premium precision powder manufacturing in the long run.
