1. Coarse Foreign Matter Removal
- Use overband cross-belt magnet to remove bulk steel wires and iron fragments directly from raw rCB output.
- Apply rotary vibrating screen to sieve out large rubber chunks, textile fibers, tire cord debris and oversized agglomerates.
2. Air Classification Winnowing
- Adopt dry airflow winnowing machine to separate light impurities like fluff, dust and loose ash.
- Remove floating light waste without changing carbon black physical properties.
3. Material De-Agglomeration Loosening
- Use low-speed dispersing crusher to break hard rCB blocks into loose powder.
- Eliminate caking caused by pyrolysis cooling and stacking, ensure uniform feeding for grinding.
4. Pre-Grinding Fine Magnetic Iron Removal
- Install high-strength neodymium magnetic separator before feeding bin.
- Remove fine micro iron powder and magnetic wear impurities in advance, protect grinding roller, liner and classifier.
5. Low-Temperature Moisture Drying
- Control raw rCB moisture below 3% via hot air drying.
- Avoid sticky material blocking grinding chamber and reduce finished product moisture content.
6. Heavy Impurity Gravity Sorting
- Remove sand, stone and heavy inorganic ash by specific gravity separation.
Core Cleaning Purpose
- Protect grinding equipment from wear and damage
- Improve finished rCB purity and reduce ash content
- Stabilize grinding efficiency and uniform particle size distribution
- Cut later refining and purification costs
Simplified Standard Flow
Raw rCB → Coarse iron removal → Vibrating sieving → Air winnowing → Block loosening → Fine magnetic separation → Drying → Feeding to grinding mill
