Case Overview
Full-process case study: carbon fiber micro-powder pelletized to improve compaction density. Demonstrates the pelletizing process and compaction density optimization for carbon fiber fine powder.
1. Material and Target
| Material Type | Carbon fiber powder (micron-scale) |
|---|---|
| Initial Condition | Carbon fiber micro-powder; extremely low bulk density, poor flowability, difficult to transport and feed |
| Material Source | Customer-supplied material |
| Key Challenge | Carbon fiber micro-powder is extremely fluffy — low bulk density drives up transport costs and makes downstream feeding difficult; pelletizing is required to increase compaction density and improve processability |
| Target Output | Pelletized granules (increased compaction density, improved flowability and feeding) |
| Downstream Use | Raw material for lithium battery conductive agents, composite material reinforcement filler, intermediate products for easier transport and storage |
2. Case Visuals
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Raw Material
On-Site
Finished Product
3. Equipment Setup
- Core Equipment: Pelletizing / Compaction Equipment
- Process Route: Carbon fiber micro-powder → pelletizing & compaction → dense granule discharge
- Processing Objective: Convert fluffy micro-powder into granules with defined compaction density and flowability
4. Process Highlights
Why Pelletizing Is Necessary
Carbon fiber powder (especially ultra-fine grades above 300 mesh) has extremely low bulk density, creating difficulties in transport, storage, and downstream feeding. Pelletizing is a critical downstream processing step — compressing micro-powder into dense granules significantly increases bulk density and flowability.
Compaction Density Control
Compaction density during pelletizing is a key quality metric — too low and the improvement is marginal; too high and the granules may be difficult to re-disperse in downstream applications. The compaction parameters must be precisely controlled based on the customer's downstream process requirements.
Partnership with Jiangsu Cnano Technology
Jiangsu Cnano Technology is a publicly listed company in the carbon nanotube and carbon fiber conductive agent sector. This collaboration focused on optimizing the pelletizing compaction density of carbon fiber powder.
5. Result Summary
- Output: Dense carbon fiber granules after pelletizing; bulk density significantly increased
- Pellet Properties: Improved flowability, suitable for pneumatic conveying and automated feeding; re-dispersible in downstream solvents
- Applications: Lithium battery conductive agents, conductive coatings, composite material reinforcement fillers