What is the role of carbon black crushing equipment?

Functions of Carbon Black Crushing Equipment
1.Grinding coarse carbon black into fine powder

The internal grinding disc, hammer, or high‑speed rotor generates impact, shear, and grinding forces on the incoming carbon black, rapidly reducing particle size to the micron or even nano level.
2.Ultra fine classification

The upper section of the equipment is equipped with an ultra‑fine classifier. The classifier’s impeller creates a strong induced airflow that separates fine particles from coarse ones. Qualified fine powder is discharged directly through the outlet pipe, while unqualified coarse powder is drawn back to the feed inlet by the strong suction of a venturi ejector for secondary crushing, forming a closed‑loop cycle.
3.Control of particle size and oversize

The speed of the classification wheel is adjustable; higher speeds produce finer particles and reduce oversize, meeting different product specifications.
4.Energy reduction and efficiency improvement

Through the one‑to‑one customized design, the equipment achieves the required fineness while minimizing power consumption, delivering high efficiency and energy savings.
5.Integrated dust removal

The system is often paired with pulse or simple dust‑removal units that use water mist or airflow to suppress dust, complying with environmental regulations.
Carbon Black Processing Flow
1.Raw material pre‑treatment

Carbon black feedstock (e.g., furnace carbon black, waste rubber carbon black) is introduced via the feed system. Some processes employ wet grinding, adding water mist or spray inside the grinding chamber to reduce dust and enhance grinding efficiency.
Coarse → Fine → Ultra‑fine classification

Coarse grinding: The primary grinding chamber uses the first and second grinding rollers for the initial breakage of coarse carbon black.
Fine grinding: After passing through the first screen, the coarse particles enter a second set of rollers for secondary fine grinding.
Ultra‑fine classification: The finely ground carbon black enters the classifier, where a high‑speed impeller separates particles that meet the target size, sending them directly to the discharge pipe. Particles that do not meet the criteria are returned to the feed inlet via a screw conveyor and re‑crushed until they meet specifications. The classifier speed can be adjusted to control fineness and reduce oversize.
2.Dust removal and recovery

Dust generated during grinding is captured by pulse, bag, or electrostatic dust‑removal devices, preventing environmental release. Collected dust can be recycled back into the process.
3.Post‑treatment and application

The fine powder can be directly used as a filler or pigment in rubber, plastics, inks, and coatings, or mixed with water or other additives for wet granulation to produce carbon black granules or powders.
For carbon black containing ash or impurities, vibration screening, thermal treatment, or chemical cleaning may be employed to remove contaminants and improve purity, enabling resource reutilization.
4.Closed‑loop recycling

The production line adopts a sealed screw‑conveyor and pressure‑induced suction system to return unqualified particles to the grinding stage, achieving a “grind‑classify‑return” loop that minimizes waste and energy consumption.
Key Technical Highlights